CN1240672A - 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
- CN1240672A CN1240672A CN 99104230 CN99104230A CN1240672A CN 1240672 A CN1240672 A CN 1240672A CN 99104230 CN99104230 CN 99104230 CN 99104230 A CN99104230 A CN 99104230A CN 1240672 A CN1240672 A CN 1240672A
- Authority
- CN
- China
- Prior art keywords
- membrane
- mixed gas
- gas
- microporous membrane
- components
- 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.)
- Granted
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Gas Separation By Absorption (AREA)
Abstract
A process for removing some component from mixed gas features use of the microporous membrane of hollow fibres. Said mixed gas is at one side of said microporous membrane and the correspondent absorbing liquid is at another side. The component to be removed from mixed gas passes through the membrane and then is subjected to irreversible chemical reaction with the absorbing liquid. A pressure difference for the component is generated between both sides of the membrane, so the component continuously passes through the membrane. For other components in mixed gas, there is no said pressure difference. The separated component reacts with the absorbing liquid to generate useful product.
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 isused 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 hollow-fibre microporous membrane of polypropylene or polyethylene is used, which has one side connected to gas mixture and another side with absorption liquid, and both sides of said membrane are at ordinary pressure.
2. The method as claimed in claim 1, wherein the mixed gas at one side of the membrane is regenerated gas washed with synthetic ammonia copper, the absorption liquid at the other side of the membrane is sulfuric acid, and the components of the mixed gas include 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 true CN1240672A (en) | 2000-01-12 |
| CN1075742C 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004054688A1 (en) * | 2002-12-18 | 2004-07-01 | 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 |
Family Cites Families (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
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004054688A1 (en) * | 2002-12-18 | 2004-07-01 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1075742C (en) | 2001-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Park et al. | Absorption of SO2 from flue gas using PVDF hollow fiber membranes in a gas–liquid contactor | |
| Henis et al. | The developing technology of gas separating membranes | |
| US5407466A (en) | Sour gas treatment process including membrane and non-membrane treatment steps | |
| US5558698A (en) | Acid gas fractionation process | |
| Park et al. | Absorption of nitrogen dioxide by PVDF hollow fiber membranes in a G–L contactor | |
| Chatzidaki et al. | New polyimide–polyaniline hollow fibers: synthesis, characterization and behavior in gas separation | |
| Seong et al. | Optimization of pilot-scale 3-stage membrane process using asymmetric polysulfone hollow fiber membranes for production of high-purity CH4 and CO2 from crude biogas | |
| EP0641244A1 (en) | Treatment of acid gas using hybrid membrane separation systems | |
| JPH0691130A (en) | High pressured promotion film for selective separation and its usage | |
| DE3851367T2 (en) | Ammonia separation using semipermeable membranes. | |
| JP2010500272A (en) | Hydrogen purification method | |
| US20040091409A1 (en) | Removal of acid gases from a feed gas | |
| CN110697655A (en) | Method and system device for recovering hydrogen through membrane separation and concentration | |
| CN102989268A (en) | Method for processing Claus tail gas through membrane separation | |
| KR20180050450A (en) | Separation and recovery process of carbon monoxide from by-product gas of steel industry | |
| CA1128316A (en) | Process for synthesis gas mixtures | |
| CN1075742C (en) | Process for removing components from mixed gas with microporous membrane of hollow fibres | |
| US20130319231A1 (en) | Integrated system for acid gas removal | |
| CN111821818A (en) | Method and device for inorganic membrane multistage gas separation | |
| US5693121A (en) | Semi-permeable membrane separation process for the production of very high purity nitrogen | |
| CN104857742A (en) | Water removal method of dichloromethane | |
| CN114159954A (en) | Phase change solvent coupling membrane separation flue gas CO2System and method | |
| KR20220010550A (en) | Hydrogen Sulfide-Carbon Dioxide Membrane Separation System and Separation | |
| WO2020236675A1 (en) | Process of improved sulfur capture from a syngas mixture involving absorption and membrane diffusion steps | |
| CN111467914A (en) | Process and equipment for enriching low-concentration fast gas in mixed gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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. |
|
| 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. |
|
| 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 |
|
| 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. |
|
| 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 |