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Process for separation of gases

A technology for separating gas and membrane separation, applied in separation methods, gas fuel, gas treatment, etc.

Inactive Publication Date: 2013-04-24
EVONIK FIBERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] A disadvantage of the methods known from the prior art is that a high purity of the permeate gas or a high purity of the retentate gas can be achieved

Method used

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  • Process for separation of gases
  • Process for separation of gases
  • Process for separation of gases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1: Separation of a mixture of methane and carbon dioxide with a mixing ratio of 50:50 using a highly selective polyimide membrane

[0078] use Figure 11 connections shown. Each stage is composed of hollow fiber membrane modules with about 5m 2 The separation area of ​​the components / components is constructed of highly selective hollow polyimide fibers. These hollow polyimide fibers were prepared according to example 19 of Austrian patent application A1164 / 2009, but where operating with a precipitation bath temperature of 40°C instead of 10°C. will be 1m 3 A raw gas mixture of 50% methane and 50% carbon dioxide per h (which roughly corresponds to the gas mixture of biogas) is introduced into the mixing chamber and then compressed to 25 bar together with the recycle gas consisting of streams 9 and 10. The gas, which has been compressed and cooled to 20° C., is applied to feed stream separation stage 1 . The retentate of this stage is fed to the retentate sep...

Embodiment 2

[0080] Example 2: Separation of a mixture of methane and carbon dioxide with a mixing ratio of 50:50 using a highly selective polyimide membrane with a methane content of less than 0.5% in the permeate stream

[0081] In order to meet the requirements of various legislators, the loss of methane to the atmosphere must be kept as low as possible. use Figure 11 The connection shown is to reduce the concentration of methane in the third permeate stream 11 to less than 0.5% by volume. Each stage is composed of hollow fiber membrane modules with about 5m 2 Highly selective polyimide composition of / component separation area. These hollow polyimide fibers were prepared according to example 19 of Austrian patent application A1164 / 2009, but where operating with a precipitation bath temperature of 40°C instead of 10°C. will be 1m 3 A raw gas mixture of 50% methane and 50% carbon dioxide per h (which roughly corresponds to the gas mixture of biogas) is introduced into the mixing cha...

Embodiment 3

[0083] Example 3: Separation of methane and carbon dioxide with a 50:50 mixture by means of a vacuum pump for the permeate of stage 2 with a highly selective polyimide membrane at a methane content of less than 0.5% in the permeate stream mixture of ratios

[0084] In order to meet the requirements of various legislators, the loss of methane to the atmosphere must be kept as small as possible. use Figure 11 connections shown (supplemented with Figure 11 vacuum pump not shown) to reduce the concentration of methane in the third permeate stream 11 to less than 0.5% by volume. Each stage is composed of hollow fiber membrane modules with about 5m 2 The separation area of ​​the components / components is constructed of highly selective hollow polyimide fibers. These hollow polyimide fibers were prepared according to example 19 of Austrian patent application A1164 / 2009, but where operating with a precipitation bath temperature of 40°C instead of 10°C. will be 1m 3 A raw gas mi...

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Abstract

The invention relates to a specific apparatus, more particularly a chain of gas separation membrane modules, for separation of gas mixtures into two fractions each of elevated purity.

Description

technical field [0001] The present invention relates to specific apparatus, and more particularly to a chain of gas separation membrane modules, for separating a gas mixture into two fractions each of increased purity. Background technique [0002] With gas separation membranes, gas mixtures can be separated based on the different permeation rates (= mass flow per unit time, unit area, pressure difference and layer thickness) of the individual gases in the plastic. Plastics are generally processed to obtain hollow fibers or flat membranes. The membrane is characterized by a very thin separation layer at the membrane surface, so that the permeability (substance flow per unit time, unit area and pressure difference) of the membrane is as large as possible. [0003] The separation result that can be achieved with a membrane in one breakthrough depends not only on the selectivity of the membrane but also on the pressure ratio between the high-pressure side and the low-pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22C10L3/10
CPCY02C10/10B01D2257/504B01D53/227B01D53/225B01D2256/24C10L3/104B01D53/226Y02C20/40B01D63/02B01D63/08B01D71/64B01D61/58
Inventor M·昂格兰克G·鲍姆加腾M·普利斯克H·勒格
Owner EVONIK FIBERS
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