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Methods of separating gases

一种分离气体、膜分离的技术，应用在分离方法、气体燃料、气体处理等方向

Active Publication Date: 2022-07-29
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] 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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  • Methods of separating gases
  • Methods of separating gases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1: Separation of a mixture of methane and carbon dioxide with a 50:50 mixing ratio using a highly selective polyimide membrane

[0079] use Figure 11 connection shown. Each stage consists of a hollow fiber membrane module consisting of approximately 5 m 2 A highly selective hollow polyimide fiber for the separation area of ​​the component is constructed. These hollow polyimide fibers were prepared according to example 19 of Austrian patent application A1164 / 2009, but where the operation was performed with a precipitation bath temperature of 40°C instead of 10°C. will 1m 3 A crude gas mixture of 50% methane and 50% carbon dioxide per hour, which roughly corresponds to the gas mixture of biogas, was introduced into the mixing chamber and then compressed to 25 bar together with the recycle gas consisting of gas streams 9 and 10 . The gas that has been compressed and cooled to 20° C. is applied to the feed stream separation stage 1 . The retentate of this stag...

Embodiment 2

[0081] Example 2: Separation of a mixture of methane and carbon dioxide with a mixing ratio of 50:50 with a highly selective polyimide membrane at a methane content of less than 0.5% in the permeate stream

[0082] In order to meet various legislator requirements, methane losses into the atmosphere must be kept as low as possible. use Figure 11 The connections shown are to reduce the concentration of methane in the third permeate stream 11 to less than 0.5% by volume. Each stage consists of a hollow fiber membrane module consisting of approximately 5 m 2 A highly selective polyimide composition for the separation area / components. These hollow polyimide fibers were prepared according to example 19 of Austrian patent application A1164 / 2009, but where the operation was performed with a precipitation bath temperature of 40°C instead of 10°C. will 1m 3A crude gas mixture of 50% methane and 50% carbon dioxide per hour, which roughly corresponds to the gas mixture of biogas, was...

Embodiment 3

[0084] Example 3: Separation of methane and carbon dioxide with a 50:50 mix by means of a vacuum pump for the permeate of stage 2 with a highly selective polyimide membrane with a methane content of less than 0.5% in the permeate stream mixture of ratios

[0085] In order to meet various legislator requirements, the loss of methane into 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 consists of a hollow fiber membrane module consisting of approximately 5 m 2 A highly selective hollow polyimide fiber for the separation area of ​​the component is constructed. These hollow polyimide fibers were prepared according to example 19 of Austrian patent application A1164 / 2009, but where the operation was performed with a precipitation bath temperature of 40°C instead of 10°C. will 1m 3...

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Abstract

The present invention relates to a method of separating gases, a specific apparatus for separating a gas mixture into two parts of increased purity, and more particularly a chain of gas separation membrane modules.

Description

[0001] This application is a Chinese national phase application of PCT application PCT / EP2011 / 058636 filed on May 26, 2011, the application number is 201180032140.1, and a divisional application entitled "Method for Separating Gas". technical field [0002] The present invention relates to a specific apparatus, more particularly a chain of gas separation membrane modules, for separating a gas mixture into two parts of increased purity respectively. Background technique [0003] With gas separation membranes, gas mixtures can be separated on the basis of 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 membranes are characterized by a very thin separation layer at the membrane surface, so that the permeability (mass flow per unit time, unit area and differential pressure) of the membrane is as high as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/22C10L3/10
CPCB01D53/226B01D53/227C10L3/104B01D2257/504B01D2256/24Y02C20/40B01D63/02B01D63/08B01D71/64B01D61/58B01D53/225
Inventor M·昂格兰克G·鲍姆加腾M·普利斯克H·勒格
Owner EVONIK OPERATIONS GMBH
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