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Title: Method and apparatus for the selective separation of gaseous coal gasification products by pressure swing adsorption

Abstract

Bulk separation of the gaseous components of multi-component gases provided by the gasification of coal including hydrogen, carbon monoxide, methane, and acid gases (carbon dioxide plus hydrogen sulfide) are selectively adsorbed by a pressure swing adsorption technique using activated carbon, zeolite or a combination thereof as the adsorbent. By charging a column containing the adsorbent with a gas mixture and pressurizing the column to a pressure sufficient to cause the adsorption of the gases and then reducing the partial pressure of the contents of the column, the gases are selectively and sequentially desorbed. Hydrogen, the least absorbable gas of the gaseous mixture, is the first gas to be desorbed and is removed from the column in a co-current direction followed by the carbon monoxide, hydrogen and methane. With the pressure in the column reduced to about atmospheric pressure the column is evacuated in a countercurrent direction to remove the acid gases from the column. The present invention is particularly advantageous as a producer of high parity hydrogen from gaseous products of coal gasification and as an acid gas scrubber.

Inventors:
 [1];  [2]
  1. Morgantown, WV
  2. Williamsville, NY
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
OSTI Identifier:
866376
Patent Number(s):
4696680
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02C - CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; selective; separation; gaseous; coal; gasification; products; pressure; swing; adsorption; bulk; components; multi-component; gases; provided; including; hydrogen; carbon; monoxide; methane; acid; dioxide; plus; sulfide; selectively; adsorbed; technique; activated; zeolite; combination; adsorbent; charging; column; containing; gas; mixture; pressurizing; sufficient; reducing; partial; contents; sequentially; desorbed; absorbable; removed; co-current; direction; followed; reduced; atmospheric; evacuated; countercurrent; remove; particularly; advantageous; producer; parity; scrubber; gaseous components; selective separation; activated carbon; gaseous mixture; carbon dioxide; carbon monoxide; coal gasification; hydrogen sulfide; atmospheric pressure; gas mixture; partial pressure; gaseous product; coal gas; gaseous products; pressure swing; column containing; pressure sufficient; swing adsorption; particularly advantageous; acid gas; acid gases; selectively adsorbed; including hydrogen; gasification products; gaseous component; component gases; component gas; /95/

Citation Formats

Ghate, Madhav R, and Yang, Ralph T. Method and apparatus for the selective separation of gaseous coal gasification products by pressure swing adsorption. United States: N. p., 1987. Web.
Ghate, Madhav R, & Yang, Ralph T. Method and apparatus for the selective separation of gaseous coal gasification products by pressure swing adsorption. United States.
Ghate, Madhav R, and Yang, Ralph T. Thu . "Method and apparatus for the selective separation of gaseous coal gasification products by pressure swing adsorption". United States. https://www.osti.gov/servlets/purl/866376.
@article{osti_866376,
title = {Method and apparatus for the selective separation of gaseous coal gasification products by pressure swing adsorption},
author = {Ghate, Madhav R and Yang, Ralph T},
abstractNote = {Bulk separation of the gaseous components of multi-component gases provided by the gasification of coal including hydrogen, carbon monoxide, methane, and acid gases (carbon dioxide plus hydrogen sulfide) are selectively adsorbed by a pressure swing adsorption technique using activated carbon, zeolite or a combination thereof as the adsorbent. By charging a column containing the adsorbent with a gas mixture and pressurizing the column to a pressure sufficient to cause the adsorption of the gases and then reducing the partial pressure of the contents of the column, the gases are selectively and sequentially desorbed. Hydrogen, the least absorbable gas of the gaseous mixture, is the first gas to be desorbed and is removed from the column in a co-current direction followed by the carbon monoxide, hydrogen and methane. With the pressure in the column reduced to about atmospheric pressure the column is evacuated in a countercurrent direction to remove the acid gases from the column. The present invention is particularly advantageous as a producer of high parity hydrogen from gaseous products of coal gasification and as an acid gas scrubber.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

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