[특허]Hydrogen recovery by pressure swing adsorption integrated with adsorbent membranes

Hydrogen recovery by pressure swing adsorption integrated with adsorbent membranes 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/047 B01D-053/22
출원번호	US-0736846 (1996-10-28)
발명자 / 주소	Sircar Shivaji Waldron William Emil Anand Madhu Rao Madhukar Bhaskara
출원인 / 주소	Air Products and Chemicals, Inc.
대리인 / 주소	Fernbacher
인용정보	피인용 횟수 : 50 인용 특허 : 0

초록 ▼

A method for increasing product recovery or reducing the size of steam methane reformer and pressure swing adsorption systems utilized for hydrogen production. A significant portion of the hydrogen in the PSA depressurization and purge effluent gas, which is otherwise burned as fuel in the reformer, is recovered and recycled to the PSA system to provide additional high purity hydrogen product. This is accomplished by processing selected portions of the depressurization and purge effluent gas in adsorbent membrane separators to increase hydrogen content for recycle to the PSA system. Remaining portions of the depressurization and purge effluent gas which contain lower concentrations of hydrogen are utilized for fuel value in the reformer.

대표청구항 ▼

[ We claim:] [1.] In a pressure swing adsorption process which separates a pressure swing adsorption feed gas mixture comprising one or more primary components and one or more secondary components into a product stream enriched in the primary components and one or more reject streams enriched in the secondary components, wherein the secondary components are more strongly adsorbed on an adsorbent material and the primary components are less strongly adsorbed on the adsorbent material, and wherein the pressure swing adsorption process includes at least the steps of(A) passing the pressure swing adsorption feed gas mixture through an adsorption zone at a first pressure wherein the secondary components are selectively adsorbed on the adsorbent material therein and a product stream enriched in primary components is withdrawn therefrom;(B) isolating the adsorption zone and depressurizing the zone by withdrawing therefrom desorbed and void space gas as a stream of depressurization gas; and(C) purging the resulting depressurized adsorption zone of step (b) with a purge gas stream and withdrawing therefrom a purge gas effluent; ethod for improving the recovery of the primary components in the product stream which comprises:(1) selectively segregating either the depressurization gas or the purge effluent gas by(1a) dividing the depressurization gas into at least a first portion obtained during a first period of the depressurization step and a second portion obtained during a second period of the depressurization step; or(1b) dividing the purge effluent gas into at least a first portion obtained during a first period of the purge step and a second portion obtained during a second period of the purge step;(2) passing either the first portion of depressurization gas or the second portion of the purge effluent gas as a membrane feed gas through a membrane separation zone having a permeable adsorbent membrane which divides the zone into a feed side and a permeate side, wherein the membrane feed gas passes through the feed side of the membrane separation zone and portions of the secondary components selectively adsorb and permeate through the membrane to the permeate side;(3) withdrawing from the permeate side of the membrane separation zone a permeate stream which is further enriched in the secondary components and withdrawing from the feed side of the membrane separation zone a nonpermeate stream which is depleted in the secondary components and enriched in the primary components; and(4) combining the nonpermeate stream with the pressure swing adsorption feed gas mixture and passing the resulting combined gas stream through the adsorption zone.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Hydrogen recovery by pressure swing adsorption integrated with adsorbent membranes 원문보기

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Hydrogen recovery by pressure swing adsorption integrated with adsorbent membranes 원문보기

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