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WO2010052848A1 - Dispositif de purification de l’air - Google Patents

Dispositif de purification de l’air Download PDF

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Publication number
WO2010052848A1
WO2010052848A1 PCT/JP2009/005667 JP2009005667W WO2010052848A1 WO 2010052848 A1 WO2010052848 A1 WO 2010052848A1 JP 2009005667 W JP2009005667 W JP 2009005667W WO 2010052848 A1 WO2010052848 A1 WO 2010052848A1
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WO
WIPO (PCT)
Prior art keywords
photocatalytic member
photocatalyst
titanium oxide
air purification
photocatalytic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/005667
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English (en)
Japanese (ja)
Inventor
黒羽智宏
谷口昇
徳弘憲一
徳満修三
西口昌志
稲垣純
辻由浩
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Panasonic Corp
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Panasonic Corp
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Filing date
Publication date
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Publication of WO2010052848A1 publication Critical patent/WO2010052848A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/80—Self-contained air purifiers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39—Photocatalytic properties
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B01D53/885—Devices in general for catalytic purification of waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • B01J37/0246—Coatings comprising a zeolite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/22—Halogenating
    • B01J37/26—Fluorinating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/12—Lighting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/92—Dimensions
    • B01D2255/9205—Porosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light

Definitions

  • the present invention relates to an air purification device using a photocatalytic member.
  • the organic substance decomposition action of the photocatalyst was found about 30 years ago.
  • a certain type of semiconductor such as titanium oxide
  • electrons and holes are generated, and the generated electrons and holes generate superoxide anions and hydroxy radicals on the semiconductor surface.
  • the generated superoxide anion and hydroxy radical attack the organic molecule, and the organic matter is decomposed.
  • a semiconductor material having this kind of action is called a photocatalyst.
  • a typical photocatalyst is titanium oxide.
  • an object of the present invention is to provide an air purification device that can improve the deodorization rate.
  • an air purification device of the present invention is an air purification device comprising a housing and a photocatalytic member disposed in the housing, wherein the photocatalytic member includes a base A photocatalyst supported on the base material, and an adsorbent supported on the base material.
  • the photocatalyst includes at least titanium oxide containing fluorine as a constituent element, and opens the photocatalytic member.
  • the porosity is 0% or more and 22% or less
  • the photocatalytic member is an air purification device disposed along an air flow in the casing.
  • the air purification apparatus of the present invention it is possible to improve the deodorization speed of the odor gas in the gas phase.
  • FIG. 1 is a perspective view showing a configuration of a measuring apparatus used in one embodiment of the present invention.
  • FIG. 2 is a perspective view showing a configuration of an air purification device used in another embodiment of the present invention.
  • FIG. 3 is a graph showing the deodorization characteristics of acetaldehyde measured in the same example.
  • FIG. 4 is a perspective view showing the arrangement of photocatalytic members and light sources in the air purification apparatus according to Embodiment 1 of the present invention.
  • FIGS. 5A and 5B are schematic diagrams for explaining a method for measuring the area of the opening of the photocatalytic member and the area of the photocatalytic member used for calculating the aperture ratio of the photocatalytic member, and
  • FIG. It is a schematic diagram for demonstrating the measuring method of the opening part of a base material used for calculation of an aperture ratio, and the area of a base material.
  • air purification includes adsorption and / or decomposition of organic substances floating in the air and harmful substances such as ammonia and nitrogen oxides, preferably adsorption of organic substances / toxic substances. And / or purifying the air by decomposition.
  • deodorization refers to adsorption and / or decomposition of odor components and organic substances in the gas phase.
  • concentration of odorous components and organic substances in the gas phase is reduced.
  • the odorous components and organic substances in the gas phase are adsorbed by the adsorption action of the adsorbent, and the titanium oxide photocatalyst is irradiated with ultraviolet light. Is used to decompose odor components and the like to reduce the concentration of odor components and organic substances.
  • the odor component examples include acetaldehyde, acetic acid, ammonia, sulfur compound gas (hydrogen sulfide, methyl mercaptan, etc.), and among others, the photocatalytic member of the present invention is suitable for deodorization of acetaldehyde.
  • the present invention is characterized in that in a device for air purification, a substrate carrying a photocatalyst is disposed along an air stream.
  • a substrate carrying a photocatalyst is disposed along an air stream.
  • a sheet-like member is used as the base material, and the main surface of the base material is arranged so as to be substantially parallel to the airflow.
  • the air purification device of the present invention is an air purification device comprising a housing and a photocatalytic member disposed in the housing, wherein the photocatalytic member is attached to a base material and the base material. It has a supported photocatalyst and an adsorbent supported on the base material, and the photocatalyst includes at least titanium oxide containing fluorine as a constituent element, and the porosity of the photocatalytic member is 0% or more 22% or less, and the photocatalytic member is disposed along the air flow in the housing.
  • the photocatalytic member has a porosity of 0% or more and 22% or less, and the photocatalytic member carries a photocatalyst containing at least titanium oxide containing fluorine as a constituent element. Deodorizing speed can be improved. Moreover, since the aperture ratio of the photocatalytic member is 0% or more and 22% or less, for example, irregularities can be formed on the surface of the photocatalytic member.
  • the contact surface between the air passing through the air purification device and the photocatalyst and / or the adsorbent can be increased, and the photocatalyst carried on the surface of the photocatalytic member can be uniformly irradiated with light. It can be done.
  • the deodorizing effect by a photocatalyst can further be improved.
  • the air purification apparatus of the present invention since the photocatalytic member is disposed along the air flow in the housing, it is not necessary to provide holes in the base material for the air flow to pass through. Therefore, more photocatalysts can be supported as compared with conventional substrates, and the deodorization rate can be improved.
  • the photocatalytic member is disposed in the housing, and preferably disposed in the housing, so that the air flow in the housing and the main surface of the photocatalytic member are substantially parallel to each other. It includes that the photocatalytic member is disposed so that the air outlet of the blower and the main surface of the photocatalytic member are substantially perpendicular.
  • the hole area ratio of the photocatalytic member is 0% or more and 22% or less, and preferably more than 0% and less than 20% from the viewpoint of further improving the deodorization rate, and more preferably. Is 5% or more and less than 20%, more preferably 5% or more and 10% or less, and still more preferably about 5%.
  • the aperture ratio of the photocatalytic member can be calculated from the following equation using, for example, the area of the photocatalytic member and the area of the opening of the photocatalytic member.
  • the total supported amount of the photocatalyst and the adsorbent per unit area of the base material is preferably 10 to 50 mg / cm 3 from the viewpoint of further improving the deodorization rate and extending the life of the photocatalytic member, More preferably, it is more than 30 mg / cm 3 and 50 mg / cm 3 or less, more preferably more than 35 mg / cm 3 and 50 mg / cm 3 or less.
  • the total supported amount (mg / cm 2 ) of the photocatalyst and the adsorbent is, for example, the weight of the photocatalyst and the adsorbent supported on a 200 cm 2 photocatalytic member, and the total weight (mg) of the photocatalyst and the adsorbent. Is divided by the area (200 cm 2 ).
  • the photocatalyst is titanium oxide containing fluorine as a constituent element.
  • titanium oxide containing fluorine as a constituent element includes a titanium oxide photocatalyst containing at least titanium oxide and fluorine. Titanium oxide containing fluorine as a constituent element preferably has a chemical bond between titanium oxide and fluorine from the viewpoint of effectively expressing the electron withdrawing action of fluorine and improving the promoting action of the photocatalytic reaction.
  • the deodorization rate coefficient of the photocatalyst is increased, and the deodorization rate can be further improved, so that the fluorine weight ratio is more preferably 2.5% to 3.5%, and 90% by weight of fluorine
  • the fluorine weight ratio is more preferably 2.5% to 3.5%, and 90% by weight of fluorine
  • titanium oxide examples include anatase type titanium oxide, rutile type titanium oxide, and brookite type titanium oxide.
  • anatase-type titanium oxide is preferable because it has high photocatalytic activity.
  • the weight ratio of fluorine (hereinafter also referred to as “fluorine content”) is 2 because the deodorization rate coefficient of the photocatalyst is increased and the deodorization rate can be further improved. It is preferably from 5% to 3.5%, more preferably from 2.7% to 3.3%.
  • fluorine content is 2.5% by weight or more, for example, fluorine having a large electronegativity comes to be located on the titanium oxide surface. Due to the electron withdrawing action of fluorine, adjacent hydroxyl groups are activated and hydroxyl radicals are easily generated. As a result, it is considered that the photocatalytic reaction is promoted and the deodorization rate can be improved. Moreover, if the fluorine content is 3.5% by weight or less, for example, it is considered that the number of hydroxyl groups necessary for the photocatalytic reaction on the titanium oxide surface can be secured and the deodorization rate can be maintained.
  • the “weight ratio of fluorine in titanium oxide (fluorine content)” refers to the weight ratio of fluorine to titanium (F / Ti).
  • spectrophotometric analysis JIS K 0102 is used. Can be obtained.
  • the fluorine contained in the photocatalyst is chemically bonded to titanium oxide, more preferably 95% by weight or more. More preferably, 100% by weight, that is, the total amount of fluorine contained in the titanium oxide photocatalyst is chemically bonded to titanium oxide.
  • the fluorine content chemically bonded to titanium oxide is, for example, 2.35 to 3.5% by weight, preferably 2.5 to 3.5% by weight, more preferably 2.5 to 3.3% by weight. %.
  • “chemical bond between titanium oxide and fluorine” means that titanium oxide and fluorine are chemically bonded. Preferably, it refers to a state in which titanium oxide and fluorine are bonded at the atomic level, not supported or mixed, and more preferably it means that titanium oxide and fluorine are ionically bonded.
  • titanium oxide and fluorine are ion-bonded means that the peak top of fluorine 1s orbital (F 1s ) is in the range of 683 eV to 686 eV when titanium oxide is analyzed with a photoelectron spectrometer. This is the case. This is because the value of the peak top of titanium fluoride in which fluorine and titanium are ion-bonded is within the above range.
  • fluorine-containing titanium oxide for example, a titanium oxide photocatalyst described in International Publication No. 2008/132824 can be used.
  • fluorine-containing titanium oxide for example, an anatase-type titanium oxide aqueous dispersion having an adsorption amount of n-butylamine of 8 ⁇ mol / g or less and a fluorine compound are mixed, and the pH of the mixed solution exceeds 3.
  • the step of reacting the titanium oxide and the fluorine compound in the mixed solution by adjusting the pH to 3 or less using an acid, and the step of washing the reactant obtained by the reaction are performed. You may use the fluorine-containing titanium oxide which can be obtained with the manufacturing method containing.
  • anatase type titanium oxide having an n-butylamine adsorption amount of 8 ⁇ mol / g or less for example, SSP-25 manufactured by Sakai Chemical Industry Co., Ltd. can be used.
  • anatase-type titanium oxide aqueous dispersion for example, CSB-M manufactured by Sakai Chemical Industry Co., Ltd. can be used.
  • the fluorine compound include ammonium fluoride, potassium fluoride, sodium fluoride, hydrofluoric acid, and the like.
  • Fluorine-containing titanium oxide may contain sodium, but it is preferable not to contain sodium from the viewpoint of improving photocatalytic activity and deodorization rate.
  • the ratio (A / B) of the sodium content (A wt%) in the entire photocatalyst to the fluorine content (B wt%) in the entire photocatalyst improves the photocatalytic activity and deodorization rate. From the above point, it is preferably 0.01 or less, more preferably 0.005 or less, and still more preferably 0.001 or less.
  • the specific surface area of the photocatalyst is preferably 200 to 350 m 2 / g, more preferably 250 to 350 m 2 / g, from the viewpoint of increasing the contact surface between the photocatalyst and the odor component and improving the photocatalytic reaction efficiency.
  • the specific surface area means a surface area value per 1 g of the photocatalyst powder measured by the BET method (nitrogen adsorption / desorption method).
  • the specific surface area is 200 m 2 / g or more, the contact area with the object to be decomposed can be increased.
  • adsorbent examples include aluminosilicate and silica gel. Of these, aluminosilicate is preferable, and examples of the aluminosilicate include zeolite. Among the zeolites, high silica zeolite is preferable from the viewpoint of ultraviolet light permeability and deodorizing performance, and ZSM-5 type zeolite is more preferable from the viewpoint of adsorption of odor components.
  • the molar component ratio of silica and alumina in the zeolite is, for example, 10 or more, preferably 1500 or more.
  • a commercial product may be used as the zeolite.
  • Examples of commercially available products include HSZ-890HOA (manufactured by Tosoh Corporation, ZSM-5 type, silica / alumina ratio: 1500 to 2000 (average: 1890), average particle size of 8 to 14 ⁇ m, cation type: H, specific surface area ( BET): 280 to 330 m 2 / g), HiSiv (TM) -3000 (manufactured by Union Showa Co., Ltd., average particle size: 12.7 ⁇ m, cation type: Na, pore size: 6 angstroms or less, specific surface area (BET): 400 m 2 / g or more).
  • the weight ratio of the photocatalyst to the adsorbent in the photocatalytic member is, for example, 9: 1 to 1: 9, and 8: 2 to 5: 5 from the viewpoint of deodorization performance. Is more preferable, and 7: 3 is more preferable.
  • the photocatalytic member may contain a binder as another component from the viewpoint of improving the adhesion between the titanium oxide and / or the adsorbent and the base material.
  • a binder examples include colloidal silica, colloidal alumina, montmorillonite, and kaolin.
  • the ratio of the binder in the photocatalytic member can be appropriately determined according to the type of binder and the binding force, but it is preferably small from the viewpoint of improving the deodorizing performance.
  • the weight ratio of the total of the photocatalyst and the adsorbent to the binder in the photocatalytic material is, for example, 10: 0 to 5: 5
  • the ratio is preferably 9: 1 to 7: 3.
  • the photocatalytic member preferably further has colloidal silica as a binder. Since colloidal silica transmits ultraviolet light, the use of colloidal silica as a binder ensures that the photocatalyst and adsorbent are supported on the base material and transmits the ultraviolet light necessary for excitation of titanium oxide satisfactorily. it can.
  • a fiber fabric, a punching metal, a lath material, or the like can be used as the base material of the photocatalytic member.
  • the fiber fabric include a knitted fabric, a woven fabric, and a non-woven fabric. Among these, a knitted fabric and a woven fabric are preferable from the viewpoint of pressure loss, and a woven fabric is more preferable.
  • fibers used in the fabric include polyamide fibers, polyester fibers, polyalkylene paraoxybenzoate fibers, polyurethane fibers, polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, and polyacrylonitrile fibers.
  • Synthetic fibers such as fibers, polyolefin fibers and phenol fibers; inorganic fibers such as glass fibers, metal fibers, alumina fibers and activated carbon fibers; natural fibers such as wood pulp, hemp pulp and cotton linter pulp; and recycled fibers Among them, glass fiber is preferable from the viewpoint of light transmittance.
  • a glass fiber fabric is preferably used as the substrate, and more preferably a glass fiber woven fabric.
  • the base material may be used in a sheet shape (flat plate shape). Further, for example, it may be formed into a honeycomb by pleating or corrugating.
  • the porosity of the base material is preferably 0% or more and 25% or less, for example, from the point of setting the porosity of the photocatalytic member within the above range, and it is easy to support the photocatalyst and the adsorbent. From the point that irregularities are formed on the surface of the photocatalytic member to be able to increase the contact between the photocatalyst and / or the adsorbent and the air passing through the air purification device, more preferably 5% to 20%, still more preferably 5 % To 10%.
  • the hole area ratio of a base material can be calculated from the following formula using, for example, the area of the base material and the area of the opening of the base material.
  • the area of a base material and the area of the opening part of a base material are measured by the method as described in an Example.
  • Opening ratio (%) ⁇ (Area of opening) / (Area of base material) ⁇ ⁇ 100
  • the photocatalytic member can be produced, for example, by applying the above-described photocatalyst and adsorbent to a substrate.
  • the photocatalyst and the adsorbent may be dispersed in a solvent and then applied to the substrate.
  • the solvent for example, water, ethyl alcohol or the like can be used.
  • the coating method include slurry coating, spin coating, spray coating, casting coating, and the like.
  • the air purification apparatus of the present invention may further include a light source that is disposed in the casing and that irradiates the photocatalytic member with ultraviolet rays, and a blower for generating an airflow in the casing.
  • a blower a sirocco fan etc. are mentioned, for example.
  • the light source include a light source that emits light having a wavelength of 400 nm or less.
  • FIG. 4 is a perspective view showing the arrangement of the photocatalytic member 301 and the light source 302 arranged in the casing in the air purification apparatus according to Embodiment 1 of the present invention.
  • an airflow flowing in the direction of arrow B from the arrow A by a blower (not shown) arranged on the arrow B side is provided in the housing (not shown). )).
  • the photocatalytic member 301 and the light source 302 are arranged in the order of the photocatalytic member 301, the light source 302, and the photocatalytic member 301 from the upstream side (arrow A side) of the airflow.
  • a plurality of photocatalytic members 301 form a predetermined space between adjacent photocatalytic members 301 on the upstream side (air inlet side) and the downstream side (air outlet side) of the light source 302. Are arranged in a stacked state.
  • Each photocatalytic member 301 is arranged so that its main surface is substantially parallel to the flow of air generated by a blower (not shown), that is, along the airflow in the housing. Therefore, the air supplied by the blower (not shown) passes between the adjacent photocatalytic members 301 and the photocatalytic members 301, so that the air is supported on the photocatalytic members 301 and / or Contacted with adsorbent and purified.
  • the light source 302 is disposed such that its main axis is orthogonal to the main surface of the photocatalytic member 301 and the air flow (arrows A and B). Thereby, for example, the photocatalytic member 301 can be irradiated with light evenly.
  • the blower (not shown) may be arranged on either the upstream side (arrow A side) of the photocatalytic member 301 or the downstream side (arrow B side) of the photocatalytic member 301, but from the point of maintenance, the arrow It is preferable to arrange on the B side (air outlet side).
  • FIG. 4 shows an example in which the photocatalytic member 301 is arranged so that the main surface of the photocatalytic member 301 is substantially parallel to the air flow, but the arrangement of the photocatalytic member 301 is not limited to this, for example, The photocatalytic member 301 may be disposed at a predetermined angle with respect to the airflow generated by the blower.
  • the example in which the light source 302 is arranged so as to be orthogonal to the main surface of the photocatalytic member 301 is shown, but the arrangement of the light source 302 is not limited to this, for example, with respect to the main surface of the photocatalytic member 301
  • the main axis of the light source 302 may be arranged so as to be inclined at a predetermined angle, or the main surface of the photocatalytic member 301 and the main axis of the light source 302 may be arranged in parallel.
  • the laminated body of the photocatalytic member 301 is disposed on the arrow A side (air inlet side) and arrow B side (air outlet side) of the light source 302 so that the light source 302 is sandwiched therebetween.
  • the laminated body of the photocatalytic member 301 may be either the inlet side or the outlet side.
  • a dust collecting filter may be arranged on the upstream side (arrow A side) of the photocatalytic member 301.
  • Example 1 In Example 1, in the air purification apparatus according to the present invention, the deodorizing performance was evaluated by changing the opening ratios of the base material and the photocatalytic member.
  • FIG. 1 is a perspective view showing the configuration of the measuring apparatus 101 used in the first embodiment.
  • the measuring device 101 includes an acrylic box (internal volume: 100 L) 105, an air purification device 103 and a stirring fan 102 disposed therein.
  • the acrylic box 105 includes an introduction port 108 for introducing an odor component and an exhaust port 109 capable of sampling the air in the acrylic box 105.
  • a gas chromatograph (trade name: GC-14B, manufactured by Shimadzu Corporation) capable of automatic sampling every 3 minutes was connected to the discharge port 109 (not shown).
  • GASCHROPACK 56 (trade name, manufactured by GL Sciences) was used for the column of the gas chromatograph.
  • the air purification device 103 includes a housing 110, a black light 104, a sheet-like photocatalytic member (100 mm ⁇ 200 mm) 106, and a blower 107.
  • the blower 107 can generate an airflow in a direction along the surface of the photocatalytic member 106, that is, in a direction substantially parallel to the surface of the photocatalytic member 106. That is, in the air purification device 103, it can be said that the photocatalytic member 106 is disposed along the air flow in the housing 110.
  • a black light blue fluorescent lamp (product number: FL6BL-B, manufactured by Matsushita Electric, maximum wavelength: 352 nm, rated lamp power: 6 W, ultraviolet radiation output: 0.6 W) was used.
  • the black light 104 was disposed so that the upper surface of the photocatalytic member 106 was irradiated with ultraviolet light (365 nm) having an illuminance of 1.0 mW / cm 2 .
  • the illuminance was measured using an ultraviolet integrated light meter (trade name: UVD-S365, manufactured by USHIO INC.).
  • titanium oxide so that the concentration of titanium oxide (trade name: SSP-25, manufactured by Sakai Chemical Industry Co., Ltd., anatase type, particle size: 5-10 nm, specific surface area: 270 m 2 / g or more) is 150 g / L.
  • Water was added and stirred to prepare a titanium oxide dispersion.
  • hydrofluoric acid made by Wako Pure Chemical Industries, special grade
  • fluorine element
  • the reaction was performed at 25 ° C. for 60 minutes.
  • the resulting reaction product was washed with water. The washing with water was performed until the electric conductivity of the filtrate collected by filtering the reaction product was 1 mS / cm or less. And this was dried in air at 130 degreeC for 5 hours, and the titanium oxide photocatalyst was prepared.
  • titanium oxide photocatalyst When the titanium oxide photocatalyst was analyzed with a photoelectron spectrometer, it showed a spectrum in which the peak top of F 1s was in the range of 683 eV to 686 eV. That is, it was confirmed that titanium oxide and fluorine were ionically bonded in the obtained titanium oxide photocatalyst.
  • the base material with a porosity of 50% was produced by removing some fibers from a glass fiber nonwoven fabric having a trade name of V375H (manufactured by Unitika Ltd.) so that the porosity was 50%.
  • FIGS. 5A and 5B are schematic views for explaining a method for measuring the opening of the photocatalytic member and the area of the photocatalytic member
  • FIG. 5B is an enlarged view of the projection pattern of the photocatalytic member.
  • the photocatalytic member 501 is disposed on the glass plate 504 so that its main surface is substantially parallel to the main surface of the glass plate 504, and is further perpendicular to the photocatalytic member 501.
  • the light 502 was disposed on the photocatalytic member 501.
  • the vertical length (a 1 ) and the horizontal length (b 1 ) of a predetermined range in the projection pattern 503, that is, the length in the horizontal direction (b 1 ) are used. Measured and multiplied ((a 1 ) ⁇ (b 1 )).
  • the area of the opening was determined as follows. First, the presence / absence of a non-shadow portion (a portion irradiated with bright light that passed through the opening of the photocatalytic member) in the projection pattern 503 was confirmed.
  • the area of the opening was set to zero. Also, if confirmed portions not shaded by visually measuring the length of the outer periphery of that portion, and calculates an area (S 1) of the portion (opening) therewith. A plurality of similar measurements were performed, and the average value was defined as the area per opening. The area per one opening (average value) obtained was multiplied by the number of openings included in the predetermined range to determine the area of the opening used for calculating the opening ratio of the photocatalytic member. .
  • the area of the filter substrate and the area of the opening were determined by the method shown in FIG. 5C.
  • the area of the filter substrate was determined.
  • the vertical length (X ′ 1 ) and the horizontal length (Y ′ 1 ) of one opening located in the measurement region are measured using a ruler and multiplied by (( X ′ 1 ) ⁇ (Y ′ 1 ))
  • the area per opening was determined.
  • a plurality of similar measurements were performed, and the average value was defined as the area per opening in the measurement region.
  • the area per opening (average value) obtained was multiplied by the number of openings included in a predetermined range to obtain the area of the opening. In addition, when the opening could not be confirmed visually, the area of the opening was set to zero.
  • Total supported amount of photocatalyst and adsorbent per unit area of substrate The total supported amount of the photocatalyst and the adsorbent per unit area in the photocatalytic member was calculated from the following equation using the weight and area of the photocatalytic member.
  • Load (mg / cm 2 ) ⁇ (weight of photocatalytic member (mg)) / (area of photocatalytic member (cm 2 )) ⁇
  • the time change of the acetaldehyde concentration 3 minutes to 15 minutes after the start of deodorization was approximated logarithmically, and the absolute value of the slope was taken as the deodorization rate coefficient.
  • rate was calculated
  • the reduction rate of the obtained deodorization rate was compared with the hole opening rate, and the case where the reduction rate was lower than the hole opening rate was judged as ⁇ , and the case where it was the same or higher was judged as ⁇ .
  • the obtained deodorization rate coefficient, the reduction rate of the deodorization rate and the determination result are shown in the following (Table 1).
  • the deodorization rate reduction rate was lower than the aperture ratio. This means that the deodorization rate is maintained even though the area of the photocatalytic member 106 that receives ultraviolet light is reduced by an amount corresponding to the aperture ratio. Furthermore, when the hole area ratio was 10% or less, the deodorization rate reduction rate was significantly smaller than the hole area ratio. From the above results, it was found that the porosity of the photocatalytic member was preferably 0% or more and 22% or less, more preferably 5% or more and 10% or less. In addition, it was found that the opening ratio of the substrate in the photocatalytic member is preferably 0% or more and 25% or less, and the opening ratio of the substrate is more preferably 10% or less.
  • a photocatalytic member was prepared in the same manner as in Example 1 except that fluorine was not contained in titanium oxide (trade name: SSP-25, manufactured by Sakai Chemical Industry Co., Ltd.).
  • a substrate having a hole area ratio of 10% was used as the substrate.
  • Example 1 the produced photocatalytic member was placed in the measuring apparatus 101 shown in FIG. 1, and the deodorizing performance was evaluated by the same method as in Example 1.
  • the deodorization rate coefficient of the air purification device using the photocatalytic member of this reference example was 0.082.
  • Table 1 in the case of an air purification device provided with a photocatalytic member using a titanium oxide photocatalyst having a fluorine content of 3.3% by weight, when using a base material with a porosity of 10% The deodorization rate coefficient of was 0.276. From this result, it was shown that the air purification apparatus using the photocatalytic member of Example 1 using titanium oxide containing fluorine as a photocatalyst has a larger deodorization rate coefficient and is superior in deodorization characteristics.
  • Example 2 the deodorizing performance was evaluated using an air purification device capable of irradiating ultraviolet light from both sides of a sheet-like photocatalytic member.
  • FIG. 2 is a perspective view showing the configuration of the air purification device 203 used in this embodiment.
  • the air purification device 203 includes a casing 210, black lights 204 and 304, a sheet-like photocatalytic member (100 mm ⁇ 200 mm) 206, and a blower 207. Similar to the air purification device 103 used in Example 1, the blower 207 can generate an air flow in a direction along the surface of the photocatalytic member 206, that is, in a direction substantially parallel to the surface of the photocatalytic member 206. It is.
  • the black lights 204 and 304 were the same type as in Example 1.
  • the black light 204 is disposed so that the upper surface of the photocatalytic member 206 is irradiated with ultraviolet rays (365 nm) having an illuminance of 0.5 mW / cm 2 or more.
  • the black light 304 is disposed on the lower surface of the photocatalytic member 206.
  • the ultraviolet rays (365 nm) having an illuminance of 0.5 mW / cm 2 or more were irradiated.
  • the base material used had a hole area ratio of 10%, and the hole area ratio of the photocatalytic member 206 was 5%.
  • the produced air purification device 203 was disposed in an acrylic environmental test chamber (internal volume: 1 m 3 ). Next, the water dilution of acetaldehyde was vapor diffused in an environmental test chamber, and the acetaldehyde concentration in the room was 1 ppm. Then, deodorization was started by turning on the black lights 204 and 304 and operating the blower 207. The operation of the blower 207 was adjusted so that the wind speed was about 1 m / s.
  • the odor in the environmental test chamber was collected 10 minutes, 30 minutes, 60 minutes and 90 minutes after the start of deodorization.
  • the collected odor (3 L) was concentrated with DNPH (dinitrophenyl), and the acetaldehyde concentration was measured using liquid chromatography. The obtained results are shown in FIG.
  • the present invention is useful for a purification device used for the purpose of deodorization, deodorization, air purification and the like.

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  • Engineering & Computer Science (AREA)
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  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
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  • Public Health (AREA)
  • Veterinary Medicine (AREA)
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  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Central Air Conditioning (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

La présente invention concerne un dispositif de purification de l’air qui améliore la vitesse de désodorisation. Le dispositif de purification de l’air (103) est doté d’un boîtier (110) et d’un élément photocatalytique (106) placé dans le boîtier (110). L’élément photocatalytique (106) a un matériau de base, un photocatalyseur chargé dans le matériau de base, et un adsorbant chargé dans le matériau de base. Le photocatalyseur comprend au moins de l’oxyde de titane qui contient du fluor en tant qu’élément composant. La porosité de l’élément photocatalytique (106) est de 0 à 22 %, et l’élément photocatalytique (106) est placé le long du courant d’air dans le boîtier (110).
PCT/JP2009/005667 2008-11-05 2009-10-27 Dispositif de purification de l’air Ceased WO2010052848A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108097039A (zh) * 2017-12-26 2018-06-01 北京阳光凯特科技有限公司 一种光催化空气净化器及其光催化净化部件

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JP2014193433A (ja) * 2013-03-28 2014-10-09 Yokohama National Univ 可視光応答型ハイブリッド光触媒及びその製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10286436A (ja) * 1997-04-16 1998-10-27 Toto Ltd 脱臭装置用脱臭体及び脱臭装置
JP2002028494A (ja) * 1997-04-02 2002-01-29 Nippon Sheet Glass Co Ltd 光触媒担持体およびその製造方法
JP2003093486A (ja) * 2001-09-25 2003-04-02 Toto Ltd 光触媒脱臭装置
WO2008132824A1 (fr) * 2007-04-18 2008-11-06 Panasonic Corporation Photocatalyseur oxyde de titane et son procédé de fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002028494A (ja) * 1997-04-02 2002-01-29 Nippon Sheet Glass Co Ltd 光触媒担持体およびその製造方法
JPH10286436A (ja) * 1997-04-16 1998-10-27 Toto Ltd 脱臭装置用脱臭体及び脱臭装置
JP2003093486A (ja) * 2001-09-25 2003-04-02 Toto Ltd 光触媒脱臭装置
WO2008132824A1 (fr) * 2007-04-18 2008-11-06 Panasonic Corporation Photocatalyseur oxyde de titane et son procédé de fabrication

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JONG SUNG PARK ET AL.: "Enhanced Remote Photocatalytic Oxidation on Surface-Fluorinated Ti02", LANGMUIR, vol. 20, no. 26, 19 November 2004 (2004-11-19), pages 11523 - 11527 *
JUNWANG TANG ET AL.: "Photocatalytic Properties and Photoinduced Hydrophilicity of Surface-Fluorinated Ti02", CHEMISTRY OF MATERIALS, vol. 19, no. 1, 10 December 2006 (2006-12-10), pages 116 - 122 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108097039A (zh) * 2017-12-26 2018-06-01 北京阳光凯特科技有限公司 一种光催化空气净化器及其光催化净化部件

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