JP2002361037A - Method and apparatus for decomposing n2o gas - Google Patents
Method and apparatus for decomposing n2o gasInfo
- Publication number
- JP2002361037A JP2002361037A JP2001169104A JP2001169104A JP2002361037A JP 2002361037 A JP2002361037 A JP 2002361037A JP 2001169104 A JP2001169104 A JP 2001169104A JP 2001169104 A JP2001169104 A JP 2001169104A JP 2002361037 A JP2002361037 A JP 2002361037A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- decomposing
- photocatalyst
- rod
- shaped electrode
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 12
- 239000011941 photocatalyst Substances 0.000 claims abstract description 11
- 239000012212 insulator Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 9
- 238000000354 decomposition reaction Methods 0.000 claims description 8
- 239000008188 pellet Substances 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 5
- 230000033116 oxidation-reduction process Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 73
- 239000003994 anesthetic gas Substances 0.000 abstract description 3
- 239000012789 electroconductive film Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 6
- 239000011888 foil Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 101001062854 Rattus norvegicus Fatty acid-binding protein 5 Proteins 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Catalysts (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は医療用の麻酔ガス等
に用いられるＮ2 Ｏガスを無害化するためのＮ2Ｏガス
の分解方法および分解装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for decomposing N 2 O gas for detoxifying N 2 O gas used for medical anesthesia gas and the like.
【０００２】[0002]
【従来の技術】医療用の麻酔ガスとしてＮ2 Ｏガスが用
いられている。このＮ2 Ｏガスの使用量は６５％濃度の
Ｎ2 Ｏガスの場合６００ｌ／ｈｒ程度の流量で約１時間
程度使用されており、１回の使用量としては可なりの量
となる。2. Description of the Related Art N 2 O gas is used as a medical anesthetic gas. This N 2 O gas is used for about 1 hour at a flow rate of about 600 l / hr in the case of 65% concentration N 2 O gas, which is a considerable amount for one use.
【０００３】このように多量のＮ2 Ｏガスを廃棄する場
合、吸着により処理すると装置が大掛かりとなり、吸着
した部材は有害廃棄物であるため、廃棄のためのコスト
が高くなるという問題があった。When such a large amount of N 2 O gas is discarded, if the treatment is carried out by adsorption, the equipment becomes large-scale, and the adsorbed member is a hazardous waste, so that the cost for disposal is high. .
【０００４】従って、現状ではパイプで高所に導き、大
気中に放出して拡散させることが一般に行われている
が、Ｎ2 Ｏガスは空気より重いため、高所より沈み込
み、場合によっては、人のいる所で濃度が高くなるとい
う恐れがあった。Therefore, at present, it is generally practiced to guide the pipe to a high place, discharge it into the atmosphere and diffuse it. However, since N 2 O gas is heavier than air, it sinks from a high place and sometimes sinks. However, there was a risk that the concentration would increase where people were present.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記問題を解
決するためになされたものであり、その目的は医療用の
麻酔ガス等に用いられるＮ2 Ｏガスを低コストで無害化
するためのＮ2 Ｏガスの分解方法および分解装置を提供
することである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to make N 2 O gas used for medical anesthetic gas etc. harmless at low cost. An object of the present invention is to provide a method and an apparatus for decomposing N 2 O gas.
【０００６】[0006]
【課題を解決するための手段】本発明のＮ2 Ｏガスの分
解方法は、Ｎ2 Ｏガスにコロナ放電を印加することを特
徴とするものである。The method for decomposing N 2 O gas according to the present invention is characterized in that a corona discharge is applied to N 2 O gas.
【０００７】また、本発明のＮ2 Ｏガスの分解方法は、
Ｎ2 Ｏガスを活性化された光触媒と接触させるものであ
る。The method for decomposing N 2 O gas of the present invention
The N 2 O gas is brought into contact with the activated photocatalyst.
【０００８】また、本発明のＮ2 Ｏガスの分解方法は、
Ｎ2 Ｏガスと水蒸気の混合気体を活性化された光触媒と
接触させるものである。The method for decomposing N 2 O gas according to the present invention
The mixed gas of N 2 O gas and water vapor is brought into contact with the activated photocatalyst.
【０００９】また、本発明のＮ2 Ｏガスの分解方法は、
Ｎ2 Ｏガスと通常の水よりも酸化還元電位の低い水を蒸
発させた水蒸気との混合気体を活性化された光触媒と接
触させるものである。Further, the method for decomposing N 2 O gas of the present invention comprises:
A mixed gas of N 2 O gas and water vapor obtained by evaporating water having a lower oxidation-reduction potential than ordinary water is brought into contact with the activated photocatalyst.
【００１０】また、本発明のＮ2 Ｏガスの分解装置は、
絶縁体で形成されガス入り口およびガス出口を有する絶
縁体のパイプの内部に棒状電極を挿通させ、前記棒状電
極の周囲に光触媒を配置し、前記パイプの周囲に導体膜
を設け、前記棒状電極と導体膜の間に電圧を印加させる
と共に前記ガス入り口と出口の間にＮ2 Ｏガスと水蒸気
の混合気体を流すように構成したものである。The apparatus for decomposing N 2 O gas of the present invention
A rod-shaped electrode is inserted inside an insulating pipe formed of an insulator and having a gas inlet and a gas outlet, a photocatalyst is arranged around the rod-shaped electrode, a conductor film is provided around the pipe, and the rod-shaped electrode and A voltage is applied between the conductor films, and a mixed gas of N 2 O gas and water vapor flows between the gas inlet and the gas outlet.
【００１１】また、本発明のＮ2 Ｏガスの分解装置は、
前記Ｎ2 Ｏガスの分解装置において、前記光触媒を酸化
チタン（Ｔi Ｏ2 ）ペレットとし、前記棒状電極と導体
膜にパルス電圧を印加するように構成したたものであ
る。Further, the apparatus for decomposing N 2 O gas of the present invention comprises:
In the decomposition apparatus of the N 2 O gas, the photocatalyst and titanium oxide (T i O 2) pellets, in which is configured to apply a pulse voltage to the rod-shaped electrode and the conductor film.
【００１２】[0012]
【発明の実施の形態】以下本発明の実施例であるＮ2 Ｏ
ガス分解装置を図面に基づいて説明する。図１に本発明
の実施例であるＮ2 Ｏガス分解装置を示す。図１に示す
ガラス管１はその両端に絶縁碍子２、２が詰められ、絶
縁碍子２、２には棒状のコロナ電極３が挿通している。DESCRIPTION OF THE PREFERRED EMBODIMENTS N 2 O according to an embodiment of the present invention will be described below.
The gas decomposition apparatus will be described with reference to the drawings. FIG. 1 shows an N 2 O gas decomposition apparatus according to an embodiment of the present invention. A glass tube 1 shown in FIG. 1 is filled with insulators 2 at both ends, and a rod-shaped corona electrode 3 is inserted through the insulators 2.
【００１３】ガラス管１の周囲には外部電極としてアル
ミホイル等の金属箔６が貼付けられ、さらに、両端近傍
にガス入り口１ａおよびガス出口１ｂが設けられてい
る。ガラス管１の内部でコロナ電極３の周囲には直径数
ミリメートルの酸化チタン（Ｔi Ｏ2 ）ペレット５が充
填されている。この酸化チタンペレットはアナターゼ型
の結晶構造を持つものが好ましい。コロナ電極３と金属
箔６はパルス高圧電源４に接続されている。A metal foil 6 such as an aluminum foil is adhered as an external electrode around the glass tube 1, and a gas inlet 1a and a gas outlet 1b are provided near both ends. Few millimeters in diameter of the titanium oxide around the corona electrode 3 in the interior of the glass tube 1 (T i O 2) pellet 5 is filled. The titanium oxide pellet preferably has an anatase type crystal structure. The corona electrode 3 and the metal foil 6 are connected to a pulse high voltage power supply 4.
【００１４】上記構成のＮ2 Ｏガス分解装置のガス入り
口１ａからＮ2 Ｏガスと水を加熱しまたは超音波を印加
させることにより発生させた水蒸気との混合ガスが導入
される。そして、コロナ電極３にはアースとしての金属
箔６に対して電圧数キロ〜数十キロボルトで周波数数百
〜数キロヘルツの正極性方形波パルス電圧が印加され
る。水蒸気を発生させる水として酸化還元電位−２５０
ｍＶ以下の還元水を用いることが好ましい。A mixed gas of N 2 O gas and water vapor generated by heating water or applying ultrasonic waves is introduced from the gas inlet 1a of the N 2 O gas decomposing apparatus having the above structure. The corona electrode 3 is applied with a positive square wave pulse voltage having a frequency of several hundreds to several tens of kilovolts and a frequency of several hundreds to several kilohertz with respect to the metal foil 6 serving as the ground. Oxidation-reduction potential -250 as water for generating steam
It is preferable to use reduced water of mV or less.
【００１５】ガラス管１の内部では中心のコロナ電極３
からガラス管１の壁面に向かってパルスコロナ放電が発
生する。このコロナ放電は酸化チタンペレット５が充填
されている空間においても、略一様に全域に亘って発生
する。酸化チタンペレット５の表面は放電により発生す
る強力な紫外線や高電界に曝されるために活性化され触
媒効果が非常に高められる。Inside the glass tube 1, a central corona electrode 3
, A pulse corona discharge is generated toward the wall surface of the glass tube 1. This corona discharge occurs substantially uniformly over the entire area even in the space filled with the titanium oxide pellets 5. Since the surface of the titanium oxide pellet 5 is exposed to strong ultraviolet light or a high electric field generated by electric discharge, it is activated and the catalytic effect is greatly enhanced.
【００１６】また、酸化チタンペレット５の間隙を通過
するＮ2 Ｏガスと水蒸気との混合ガスは直接プラズマ化
され、Ｎ2 Ｏガスの直接分解を含む高効率なプラズマ化
学反応が誘起される。本装置ではプラズマ化学反応によ
るＮ2 Ｏガスの直接分解と同時に、酸化チタンによる光
触媒効果による反応がさらに有効に利用できるために高
濃度のＮ2 Ｏガスを高効率に分解することができる。Further, the mixed gas of N 2 O gas and water vapor passing through the gap between the titanium oxide pellets 5 is directly converted into plasma, and a highly efficient plasma chemical reaction including direct decomposition of N 2 O gas is induced. In the present apparatus, simultaneously with the direct decomposition of the N 2 O gas by the plasma chemical reaction, the reaction by the photocatalytic effect of titanium oxide can be more effectively utilized, so that the high-concentration N 2 O gas can be decomposed efficiently.
【００１７】そして、ガス入り口１ａから導入されたＮ
2 Ｏガスと水蒸気の混合ガス中のＮ 2 Ｏガスは分解され
てＮ2 ガス、Ｏ2 ガス、水蒸気（Ｈ2 Ｏ）となりこれら
の混合ガスがガス出口１ｂより排出される。Then, N introduced from the gas inlet 1a
TwoN in mixed gas of O gas and water vapor TwoO gas is decomposed
And NTwoGas, OTwoGas, water vapor (HTwoO) and these
Is discharged from the gas outlet 1b.
【００１８】Ｎ2 Ｏガス６０％、空気３０％、水蒸気１
０％の混合ガスを毎分５リットル本実施例のＮ2 Ｏガス
分解装置に供給し、周波数３００Ｈｚ、電圧１０ｋｖ、
パルス幅２ｍｓの正極性方形波パルス電圧をコロナ電極
３に印加して排出ガス成分を分析した結果、Ｎ2 Ｏガス
は検出されず略１００％Ｎ2 Ｏガスが分解されることが
判明した。N 2 O gas 60%, air 30%, steam 1
0% of the mixed gas was supplied to the N 2 O gas decomposer of this embodiment at a rate of 5 liters per minute, and the frequency was 300 Hz, the voltage was 10 kv,
Result of positive polarity square wave pulse voltage was analyzed applied to exhaust gas components to the corona electrode 3 of the pulse width 2 ms, N 2 O gas was found that substantially 100% N 2 O gas is not detected is degraded.
【００１９】実施例ではＮ2 Ｏガスと水蒸気との混合ガ
スが分解装置に導入されたがＮ2 Ｏガスのみを分解装置
に導入しても本発明の効果が得られる。その場合Ｎ2 Ｏ
ガスはＮ2 ガスとＯ2 ガスに分解される。In the embodiment, the mixed gas of N 2 O gas and water vapor is introduced into the decomposer, but the effect of the present invention can be obtained by introducing only N 2 O gas into the decomposer. In that case N 2 O
The gas is decomposed into N 2 gas and O 2 gas.
【００２０】[0020]
【発明の効果】以上説明したように、本発明のＮ2 Ｏガ
スの分解方法および分解装置によればＮ2 Ｏガスを安価
に分解処理できる。従って、Ｎ2 Ｏガス排出の規制を可
能とするものである。As described above, according to the present invention, it can be inexpensively decomposing N 2 O gas, according to the decomposition method and apparatus for decomposing N 2 O gas of the present invention. Therefore, it is possible to regulate the emission of N 2 O gas.
【図１】本発明の実施例であるＮ2 Ｏガス分解装置を示
す構成図である。FIG. 1 is a configuration diagram showing an N 2 O gas decomposition apparatus according to an embodiment of the present invention.
１ ガラス管、１ａ ガス入り口、１ｂ ガス出口 ２ 絶縁碍子 ３ コロナ電極 ４ パルス高電圧電源 ５ 酸化チタンペレット ６ 金属箔 DESCRIPTION OF SYMBOLS 1 Glass tube, 1a gas inlet, 1b gas outlet 2 Insulator 3 Corona electrode 4 Pulse high voltage power supply 5 Titanium oxide pellet 6 Metal foil
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｄ 53/74 Ｂ０１Ｄ 53/34 １２９Ｃ 53/86 ＺＡＢ 53/94 53/36 Ｊ Ｂ０１Ｊ 19/08 １０２Ｃ 35/02 Ｆターム(参考） 4C080 AA07 BB05 CC07 CC12 HH05 JJ01 KK08 LL03 MM02 QQ11 4D002 AA12 BA07 CA07 DA11 DA21 DA35 4D048 AA07 AB03 BA07X BA41X BB01 EA01 EA03 4G069 AA02 BA04A BA04B BA48A CA01 CA10 CA13 EA02Y 4G075 AA03 AA37 BA04 BA05 CA18 CA54 DA02 DA12 EB21 EC21 FC11 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B01D 53/74 B01D 53/34 129C 53/86 ZAB 53/94 53/36 J B01J 19/08 102C 35 / 02 F-term (reference) 4C080 AA07 BB05 CC07 CC12 HH05 JJ01 KK08 LL03 MM02 QQ11 4D002 AA12 BA07 CA07 DA11 DA21 DA35 4D048 AA07 AB03 BA07X BA41X BB01 EA01 EA03 4G069 AA02 BA04A BA04 ABAA04 CA03 A04 EB21 EC21 FC11
Claims (6)
を特徴とするＮ2 Ｏガスの分解方法。1. A method for decomposing N 2 O gas and applying a corona discharge to the N 2 O gas.
させることを特徴とするＮ2 Ｏガスの分解方法。2. A method for decomposing N 2 O gas, characterized in that contacting the N 2 O gas activated photocatalyst.
された光触媒と接触させることを特徴とするＮ2 Ｏガス
の分解方法。3. A method for decomposing N 2 O gas, comprising contacting a mixed gas of N 2 O gas and water vapor with an activated photocatalyst.
位の低い水を蒸発させた水蒸気の混合気体を活性化され
た光触媒と接触させることを特徴とするＮ2Ｏガスの分
解方法。4. A method for decomposing N 2 O gas, comprising contacting a mixed gas of N 2 O gas and water vapor obtained by evaporating water having a lower oxidation-reduction potential than ordinary water with an activated photocatalyst. .
出口を有する絶縁体のパイプの内部に棒状電極を挿通さ
せ、前記棒状電極の周囲に光触媒を配置し、前記パイプ
の周囲に導体膜を設け、前記棒状電極と導体膜の間に電
圧を印加させると共に前記ガス入り口と出口の間にＮ2
Ｏガスと水蒸気の混合気体を流すように構成したＮ2 Ｏ
ガスの分解装置。5. A rod-shaped electrode is inserted into an insulating pipe formed of an insulator and having a gas inlet and a gas outlet, a photocatalyst is arranged around the rod-shaped electrode, and a conductor film is provided around the pipe. A voltage is applied between the rod-shaped electrode and the conductive film, and N 2 is applied between the gas inlet and the gas outlet.
N 2 O configured to flow a mixed gas of O gas and water vapor
Gas decomposition equipment.
レットであり、前記棒状電極と導体膜にパルス電圧を印
加するように構成した請求項５のＮ2 Ｏガスの分解装
置。Wherein said photocatalyst is titanium oxide (T i O 2) is a pellet, the device for decomposing N 2 O gas as claimed in claim 5 which is configured to apply a pulse voltage to the rod-shaped electrode and the conductor film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001169104A JP2002361037A (en) | 2001-06-05 | 2001-06-05 | Method and apparatus for decomposing n2o gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001169104A JP2002361037A (en) | 2001-06-05 | 2001-06-05 | Method and apparatus for decomposing n2o gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002361037A true JP2002361037A (en) | 2002-12-17 |
Family
ID=19011219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001169104A Pending JP2002361037A (en) | 2001-06-05 | 2001-06-05 | Method and apparatus for decomposing n2o gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002361037A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005144445A (en) * | 2003-10-24 | 2005-06-09 | Yamaha Corp | Gas processing method using non-equilibrium plasma, discharge electrode, and gas processing apparatus including the same |
| DE102009002948A1 (en) | 2008-05-19 | 2009-12-03 | DENSO CORPORATION, Kariya-shi | Exhaust gas processing apparatus used in internal combustion engine, has corona discharge device set at downstream side of waste gas flow in exhaust passage to oxidize nitrogen oxide in waste gas irrespective of temperature of waste gas |
| JP2016168581A (en) * | 2015-03-16 | 2016-09-23 | 岩谷産業株式会社 | Nitrous oxide gas decomposition apparatus and method |
| WO2024166213A1 (en) * | 2023-02-07 | 2024-08-15 | 株式会社ナノシード | Carbon dioxide reduction device and carbon dioxide reduction method |
| WO2025234172A1 (en) * | 2024-05-07 | 2025-11-13 | ウシオ電機株式会社 | Gas decomposition method, gas decomposition device, and gas decomposition system |
-
2001
- 2001-06-05 JP JP2001169104A patent/JP2002361037A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005144445A (en) * | 2003-10-24 | 2005-06-09 | Yamaha Corp | Gas processing method using non-equilibrium plasma, discharge electrode, and gas processing apparatus including the same |
| DE102009002948A1 (en) | 2008-05-19 | 2009-12-03 | DENSO CORPORATION, Kariya-shi | Exhaust gas processing apparatus used in internal combustion engine, has corona discharge device set at downstream side of waste gas flow in exhaust passage to oxidize nitrogen oxide in waste gas irrespective of temperature of waste gas |
| JP2016168581A (en) * | 2015-03-16 | 2016-09-23 | 岩谷産業株式会社 | Nitrous oxide gas decomposition apparatus and method |
| WO2024166213A1 (en) * | 2023-02-07 | 2024-08-15 | 株式会社ナノシード | Carbon dioxide reduction device and carbon dioxide reduction method |
| WO2025234172A1 (en) * | 2024-05-07 | 2025-11-13 | ウシオ電機株式会社 | Gas decomposition method, gas decomposition device, and gas decomposition system |
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