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제목 High temperature pressure swing adsorption for advanced sorption enhanced water gas shift
작성자 KCRC 등록일 2019-07-22 조회수 236

High temperature pressure swing adsorption for advanced sorption enhanced water gas shift

문헌번호

US 10350538 B2 (2019.07.16)

출원번호

15/653833 (2017.07.19)

출원인

EXXONMOBIL RESEARCH AND ENGINEERING COMPANY

발명자

Narasimhan Sundaram | Hans Thomann | David C. Calabro | Frank Mittricker

Current IPC
(Main)

B01D-053/047

 

 

우선권번호

-

 

 

요약

In various aspects, methods are provided for hydrogen production while reducing and/or mitigating emissions during various refinery processes that produce syngas, such as power generation. Syngas can be effectively separated to generate high purity carbon dioxide and hydrogen streams, while reducing and/or minimizing the energy required for the separation, and without needing to reduce the temperature of the flue gas. In various aspects, the operating conditions, such as high temperature, mixed metal oxide adsorbents, and cycle variations, for a pressure swing adsorption reactor can be selected to minimize energy penalties while still effectively capturing the CO2 present in syngas.

대표청구항

1. A method for production of H2 and CO2 from a gaseous stream, comprising: passing a gaseous stream comprising at least about 60 vol % H2 and at least about 10 vol % CO2 into a pressure swing adsorption reactor comprising a plurality of adsorbent beds containing an adsorbent material, the gaseous stream having a pressure between about 10 bara (about 1.0 MPaa) to about 40 bara (about 4.0 MPaa);in a first adsorbent bed, adsorbing CO2 on the adsorbent material at an adsorption temperature of at least 400° C.; wherein the adsorbent material comprises an one of an (i) alkali metal carbonate and an oxide of an alkaline earth metal or a transition metal and (ii) alkaline earth metal carbonate and an oxide of a transition metal;recovering an H2 stream with a purity of at least about 99 vol % from a forward end of the first adsorbent bed, the recovered H2 stream having a pressure that differs from the pressure of the gaseous stream by about 0.5 bar (about 50 kPa) or less;reducing the pressure in the first adsorbent bed to a pressure from about 5 bara (about 500 kPaa) to about 15 bara (1.5 MPaa) by equalizing the first adsorbent bed with other adsorption beds of the plurality of adsorbent beds via equalization piping;further reducing the pressure in the first adsorbent bed to a pressure from about 1.0 bara (about 0.1 MPaa) to about 4.0 bara (about 0.4 MPaa) by outputting a blow downstream from at least one end of the first adsorbent bed; andpurging the first adsorbent bed with a steam purge at a pressure from about 1.0 bara (about 0.1 MPaa) to about 4.0 bara (about 0.4 MPaa) to generate a CO2 recovery stream, the CO2 recovery stream comprising at least about 90% of the CO2 present in the gaseous stream, the steam purge containing less than about 1.0 moles of H2O per mole of CO2 recovered; wherein the passing, the adsorbing, the recovering, the reducing, further reducing, and the purging comprise a pressure swing adsorption cycle; and wherein one of the plurality of adsorption beds is used solely as a storage vessel at any one point in the pressure swing adsorption cycle.

WIPS 패밀리

US10350538B2 | US62/370890 | WOWO2018-026518A1

 

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