CN1075742C - Process for removing components from mixed gas with microporous membrane of hollow fibres - Google Patents
Process for removing components from mixed gas with microporous membrane of hollow fibres Download PDFInfo
- Publication number
- CN1075742C CN1075742C CN99104230A CN99104230A CN1075742C CN 1075742 C CN1075742 C CN 1075742C CN 99104230 A CN99104230 A CN 99104230A CN 99104230 A CN99104230 A CN 99104230A CN 1075742 C CN1075742 C CN 1075742C
- Authority
- CN
- China
- Prior art keywords
- membrane
- mixed gas
- components
- absorption liquid
- gas
- 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.)
- Expired - Fee Related
Links
- 239000012982 microporous membrane Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- 239000012510 hollow fiber Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- -1 polypropylene Polymers 0.000 claims description 7
- 229910000069 nitrogen hydride Inorganic materials 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- BESJRHHIPGWPTC-UHFFFAOYSA-N azane;copper Chemical compound N.[Cu] BESJRHHIPGWPTC-UHFFFAOYSA-N 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 2
- 230000002427 irreversible effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 37
- 238000000926 separation method Methods 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- JZRWCGZRTZMZEH-UHFFFAOYSA-N Thiamine Natural products CC1=C(CCO)SC=[N+]1CC1=CN=C(C)N=C1N JZRWCGZRTZMZEH-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- KYMBYSLLVAOCFI-UHFFFAOYSA-N thiamine Chemical compound CC1=C(CCO)SCN1CC1=CN=C(C)N=C1N KYMBYSLLVAOCFI-UHFFFAOYSA-N 0.000 description 1
- 229960003495 thiamine Drugs 0.000 description 1
- 235000019157 thiamine Nutrition 0.000 description 1
- 239000011721 thiamine Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The present invention relates to a method for removing components from mixed gas by a microporous membrane made of hollow fiber. The microporous membrane made of hydrophobic hollow fiber is adopted. The mixed gas is at one side of the membrane, and corresponding absorption liquid is at the other side. The components which need to be removed from the mixed gas pass through a membranous wall and create an irreversible chemical reaction with the absorption liquid. Thus, an air pressure difference is formed at both sides of the membrane by the components and pushes the absorption liquid to continuously enter the other side of the membrane from one side of the mixed gas, and the rest of the components in the mixed gas can not create a chemical reaction with the absorption liquid so that no pressure difference is formed at both sides of the membrane. Therefore, the components in the mixed gas, which create the chemical reaction with the absorption liquid, are separated. Moreover, new useful products can be generated from the reaction of the components and the absorption liquid.
Description
The invention belongs to a technology for separating components from mixed gas, and relates to a membrane method for separating the components of the mixed gas.
The existing membrane method for separating mixed gas components is applied in a wide field. The commonly used membrane materials are all dense membranes, such as polyimide, polyethersulfone and the like. The separation of the components of the mixed gas is realized by utilizing the dissolution and diffusion mechanism of the membrane material to the gas according to different selectivities of the membrane material to the gas.
This technique for separating the gaseous components with a dense membrane has the following disadvantages:
1. the large pressure difference between the two sides of the membrane is needed, which makes the equipment complicated and increases the production cost.
2. The selective separation factor of the dense membrane material to gas is often in inverse proportion to the gas permeation rate, namely, if the gas permeation rate is high, the separation factor is low, so that the gas separation efficiency is limited;
3. the compact membrane material has different selective permeability to gas, and if the gas is changed, different compact membranes are required to be selected, which brings inconvenience to production and use.
The invention aims to provide a membrane gas separation technology under the normal pressure condition aiming at the defects of the prior art, and the membrane gas separation technology has the advantages of high separation efficiency, simple structure and low cost.
In order to achieve the purpose, the technical scheme of the invention is as follows:
adopting a hydrophobic polypropylene or polyethylene hollow fiber microporous membrane, connecting mixed gas of which components (particularly acid and alkaline gases) are required to be removed on one side of the membrane, and arranging corresponding absorption liquid on the other side of the membrane; both sides of the membrane are at normal pressure; due to the hydrophobic nature of the membrane, the absorbed liquid cannot pass through the microporous membrane wall; although all components in the mixed gas can pass through the microporous membrane wall to one side of the absorption liquid, the gas components which do not require separation and removal do not react with the corresponding absorption liquid, only the components which require removal from the mixed gas immediately react with the absorption liquid irreversibly through the microporous membrane wall, so that the components form a large gas pressure difference on two sides of the membrane, and the component gas continuously enters the other side of the membrane from one side of the mixed gas and continuously reacts with the absorption liquid irreversibly. In this way, the removal of the gas components to be separated from the mixed gas can be achieved. At the same time, the component can produce new useful substances together with the absorption liquid.
The invention has prominent substantive characteristics and remarkable progress:
1. the microporosity and the air permeability of the polypropylene or polyethylene hollow fiber microporous membrane are utilized to ensure that gas can pass through the membrane wall at a large permeation rate;
2. the technology takes the membrane as a boundary, the gas phase and the liquid phase respectively flow, the two-phase flow and the pressure can be respectively controlled, the environmental pressure adopts normal pressure, a complex pressurizing device is not needed, the structure is simple, the cost is low, and the popularization and the use are convenient;
3. the gas component to be separated and the absorption liquid are subjected to irreversible chemical reaction, so that the gas pressure difference on two sides is used as a driving force, the component can be separated in a high selectivity manner, the removal rate of acidic components or alkaline gas components in the mixed gas can reach 90-98%, the purity of a product obtained on one side of the absorption liquid can be high, and the product can be used for preparing reagent-grade products.
Examples of the inventive scheme:
example 1: the mixed gas at one side of the membrane is synthetic ammonia copper washing regeneration gas as an example, and the components of the mixed gas comprise Co and NH3、CO2、N2、H2And the absorption liquid on the other side of the membrane adopts sulfuric acid, and the NH is required to be removed from the mixed gas3。NH3The gas enters the sulfuric acid solution through the hollow fiber microporous membrane to perform the following chemical reactions:
After treatment in this way, NH3The content of (A) can be reduced from 18.4% to below 0.01%.
Example 2: the mixed gas at one side of the membrane is methane or natural gas, wherein the main component is CH4、H2S、CO2And the like. The polypropylene hollow fiber microporous membrane is used as a separation membrane material, and NaOH is used as absorption liquid. H2S and CO2Can react with NaOH to remove CO2、H2S, etc. to realize CH4Purification of (4).
Claims (2)
1. A method for removing the components from gas mixture by the use of hollow-fibre microporous membrane features that a hydrophobic polypropylene or polyethylene hollow-fibre microporous membrane is used, one side of said membrane is communicated with gas mixture, and the other side of said membrane is filled with absorbing liquid.
2. The method for removing components from mixed gas by using a hollow fiber microporous membrane as claimed in claim 1, wherein the mixed gas on one side of the membrane is regenerated gas washed with synthetic ammonia copper, the absorption liquid on the other side of the membrane is sulfuric acid, and the components in the mixed gas comprise CO and NH3、CO2、N2、H2Removal of NH therefrom3,NH3The permeable hollow fiber microporous membrane and sulfuric acid solution are subjected to chemical reaction: obtaining ammonium sulfate solution, and removing NH3At the same time, refined ammonium sulfate can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99104230A CN1075742C (en) | 1999-04-26 | 1999-04-26 | Process for removing components from mixed gas with microporous membrane of hollow fibres |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99104230A CN1075742C (en) | 1999-04-26 | 1999-04-26 | Process for removing components from mixed gas with microporous membrane of hollow fibres |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1240672A CN1240672A (en) | 2000-01-12 |
| CN1075742C true CN1075742C (en) | 2001-12-05 |
Family
ID=5271576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99104230A Expired - Fee Related CN1075742C (en) | 1999-04-26 | 1999-04-26 | Process for removing components from mixed gas with microporous membrane of hollow fibres |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1075742C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2810484C1 (en) * | 2023-05-03 | 2023-12-27 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) | Method for separating ammonia from circulating gas for ammonia synthesis and device for its implementation |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003287916A1 (en) * | 2002-12-18 | 2004-07-09 | Bioscent | A system and apparatus for removal of unwanted substances in a gas flow |
| CN101670243B (en) * | 2009-09-30 | 2011-11-09 | 浙江工业大学 | Preparation method of polyethylene hollow fiber membrane with aperture in gradient distribution |
| GB2506689A (en) * | 2012-10-08 | 2014-04-09 | Odour Services Internat Ltd | Air pollution control apparatus and method of use |
| CN106554833A (en) * | 2015-09-24 | 2017-04-05 | 中国石油化工股份有限公司 | A kind of removing of hydrogen sulfide in natural gas and recycling processing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS541284A (en) * | 1977-06-03 | 1979-01-08 | Kanegafuchi Chem Ind Co Ltd | Method of separating gas |
| JPS6118419A (en) * | 1984-07-05 | 1986-01-27 | Agency Of Ind Science & Technol | Permselective method of gas |
-
1999
- 1999-04-26 CN CN99104230A patent/CN1075742C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS541284A (en) * | 1977-06-03 | 1979-01-08 | Kanegafuchi Chem Ind Co Ltd | Method of separating gas |
| JPS6118419A (en) * | 1984-07-05 | 1986-01-27 | Agency Of Ind Science & Technol | Permselective method of gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2810484C1 (en) * | 2023-05-03 | 2023-12-27 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) | Method for separating ammonia from circulating gas for ammonia synthesis and device for its implementation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1240672A (en) | 2000-01-12 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUA FILTER FILM ENGINERING CO., LTD., ZHEJIANG UNI Free format text: FORMER NAME OR ADDRESS: MEMBRANE SEPARATION ENGRG. UNITED CO., ZHEJIANG UNIV. |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Hangzhou Zhedahua Filter Membrane Engineering Co., Ltd. Patentee before: Membrane Separation Engrg. United Co., Zhejiang Univ. |
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| C56 | Change in the name or address of the patentee |
Owner name: KAIHUA MEMBRANE TECHNOLOGY CO., LTD., ZHEJIANG UNI Free format text: FORMER NAME OR ADDRESS: HUA FILTER FILM ENGINERING CO., LTD., ZHEJIANG UNIV., HANGZHOU |
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| CP03 | Change of name, title or address |
Address after: 310023, No. 398, Tianmu Road, Hangzhou, China (4 building, Ancient Industrial Park) Patentee after: Zhejiang University of Hangzhou Kai Hua Membrane Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province 310027 Ancient Jade Road 20, Zhejiang University Department of polymer. Patentee before: Hangzhou Zhedahua Filter Membrane Engineering Co., Ltd. |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |