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Gas separation membrane for dme production process

A technology of gas separation membrane and production process, which is applied in the fields of hydrogen separation, gas treatment, separation methods, etc.

Inactive Publication Date: 2012-11-28
KOREA GAS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can be used in a process for separating hydrogen from a gas mixture of carbon dioxide and hydrogen, but it is difficult to apply it to selectively remove only carbon dioxide from a gas mixture of carbon dioxide, hydrogen, and carbon monoxide in a DME process

Method used

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  • Gas separation membrane for dme production process
  • Gas separation membrane for dme production process
  • Gas separation membrane for dme production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (a) Preparation of hollow fiber membrane

[0061] 20g polyetherimide (Sabic-IP company, Ultem TM ), 20 g of tetrahydrofuran (first additive) and 20 g of ethanol (second additive) were sequentially and slowly added dropwise to 40 g of N-methylpyrrolidone (solvent) while stirring the solvent, thus preparing a uniform spinning solution. Subsequently, air bubbles were removed from the spinning solution at room temperature and reduced pressure for 24 hours, and then foreign materials were removed from the spinning solution with a 60 μm filter. Subsequently, the spinning solution was spun at a temperature of 60° C. with a cylinder pump at a flow rate of 7 cc / min. Here, the air gap was 10 cm, a double spinneret was used, and water was used as a coagulant. Further, the inner diameter and the outer diameter of the inner nozzle of the double spinning head were 0.4 mm and 0.8 mm, respectively, and the diameter of the outer nozzle of the double spinning head was 1.2 mm. Subseque...

Embodiment 2

[0069] The hollow fiber membrane prepared in the same manner as in Example 1 was unwound from the bobbin, and then immersed in a 5% polyethylene oxide-urethane coating solution (solvent: n-butane) at room temperature for 5 seconds or longer , while maintaining a constant tension to fabricate a gas separation membrane comprising a composite membrane coated with a separation material. A gas separation membrane module was manufactured using the manufactured gas separation membrane, and then the performance of the gas separation membrane module was evaluated in the same manner as in Example 1. The results are given in Table 2 below.

[0070] 【Table 2】

[0071]

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Abstract

Disclosed herein is a gas separation membrane for a DEM production process, including: a porous support having a carbon dioxide permeability of more than 300 GPU (GPU=1*10-6 cm<3> / cm<2> sec cmHg) and an inner diameter of 100~1000 micrometers; and a composite membrane provided on an inner or outer surface of the porous support and coated with a separating material having a permeation selectivity of carbon dioxide / hydrogen of 4 or more. The gas separation membrane is advantageous in that it can improve efficiency of the separation process by selectively separating and removing carbon dioxide from a gas mixture of carbon dioxide and hydrogen produced during a process of producing DME which is a next-generation clean fuel.

Description

[0001] References to related applications [0002] This application claims priority from Korean Patent Application No. 10-10-2011-0049707 filed on May 25, 2011, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a gas separation membrane for the selective separation of carbon dioxide from a gas mixture comprising carbon dioxide and hydrogen in a DME production process, and to a module comprising the gas separation membrane. Background technique [0004] A process of selectively separating a specific gas using a gas separation membrane having solubility for a specific gas is widely used in the fields of energy and chemical industries. In particular, gas separation membranes are increasingly used in processes such as natural gas reforming reactions, processes for concentrating methane from biogas, and separation of highly concentrated hydrocarbons or carbon dioxide in order to use hydrogen as an energy s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D53/22
CPCC01B3/503C01B2203/0475B01D71/76B01D71/70B01D71/52B01D69/08B01D63/02Y02C10/10B01D2257/504B01D2256/16B01D69/02B01D53/228B01D69/087B01D69/10C01B2203/0405B01D2323/46B01D2325/20Y02C20/40Y02P20/151B01D71/5211B01D69/107B01D71/701B01D69/12B01D71/06
Inventor 郑钟台白英淳赵源俊吴永三河成龙高亨澈李忠燮
Owner KOREA GAS CORPORATION
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