skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Method of CO.sub.2 removal from a gasesous stream at reduced temperature

Abstract

A method for the removal of H.sub.2O and CO.sub.2 from a gaseous stream comprising H.sub.2O and CO.sub.2, such as a flue gas. The method initially utilizes an H.sub.2O removal sorbent to remove some portion of the H.sub.2O, producing a dry gaseous stream and a wet H.sub.2O removal sorbent. The dry gaseous stream is subsequently contacted with a CO.sub.2 removal sorbent to remove some portion of the CO.sub.2, generating a dry CO.sub.2 reduced stream and a loaded CO.sub.2 removal sorbent. The loaded CO.sub.2 removal sorbent is subsequently heated to produce a heated CO.sub.2 stream. The wet H.sub.2O removal sorbent and the dry CO.sub.2 reduced stream are contacted in a first regeneration stage, generating a partially regenerated H.sub.2O removal sorbent, and the partially regenerated H.sub.2O removal sorbent and the heated CO.sub.2 stream are subsequently contacted in a second regeneration stage. The first and second stage regeneration typically act to retain an initial monolayer of moisture on the various removal sorbents and only remove moisture layers bound to the initial monolayer, allowing for relatively low temperature and pressure operation. Generally the applicable H.sub.2O sorption/desorption processes may be conducted at temperatures less than about 70.degree. C. and pressures less than 1.5 atmospheres, with certainmore » operations conducted at temperatures less than about 50.degree. C.« less

Inventors:
; ; ;
Issue Date:
Research Org.:
U.S. Department of Energy, Washington, DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1164037
Patent Number(s):
8,888,895
Application Number:
14/022,708
Assignee:
U.S. Department of Energy (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 20 FOSSIL-FUELED POWER PLANTS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION

Citation Formats

Fisher, James C, Siriwardane, Ranjani V, Berry, David A, and Richards, George A. Method of CO.sub.2 removal from a gasesous stream at reduced temperature. United States: N. p., 2014. Web.
Fisher, James C, Siriwardane, Ranjani V, Berry, David A, & Richards, George A. Method of CO.sub.2 removal from a gasesous stream at reduced temperature. United States.
Fisher, James C, Siriwardane, Ranjani V, Berry, David A, and Richards, George A. Tue . "Method of CO.sub.2 removal from a gasesous stream at reduced temperature". United States. https://www.osti.gov/servlets/purl/1164037.
@article{osti_1164037,
title = {Method of CO.sub.2 removal from a gasesous stream at reduced temperature},
author = {Fisher, James C and Siriwardane, Ranjani V and Berry, David A and Richards, George A},
abstractNote = {A method for the removal of H.sub.2O and CO.sub.2 from a gaseous stream comprising H.sub.2O and CO.sub.2, such as a flue gas. The method initially utilizes an H.sub.2O removal sorbent to remove some portion of the H.sub.2O, producing a dry gaseous stream and a wet H.sub.2O removal sorbent. The dry gaseous stream is subsequently contacted with a CO.sub.2 removal sorbent to remove some portion of the CO.sub.2, generating a dry CO.sub.2 reduced stream and a loaded CO.sub.2 removal sorbent. The loaded CO.sub.2 removal sorbent is subsequently heated to produce a heated CO.sub.2 stream. The wet H.sub.2O removal sorbent and the dry CO.sub.2 reduced stream are contacted in a first regeneration stage, generating a partially regenerated H.sub.2O removal sorbent, and the partially regenerated H.sub.2O removal sorbent and the heated CO.sub.2 stream are subsequently contacted in a second regeneration stage. The first and second stage regeneration typically act to retain an initial monolayer of moisture on the various removal sorbents and only remove moisture layers bound to the initial monolayer, allowing for relatively low temperature and pressure operation. Generally the applicable H.sub.2O sorption/desorption processes may be conducted at temperatures less than about 70.degree. C. and pressures less than 1.5 atmospheres, with certain operations conducted at temperatures less than about 50.degree. C.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {11}
}

Patent:

Save / Share:

Works referenced in this record:

Technology for removing carbon dioxide from power plant flue gas by the physical adsorption method
journal, June 1996

  • Ishibashi, Michio; Ota, Hiromitsu; Akutsu, Nobuo
  • Energy Conversion and Management, Vol. 37, Issue 6-8, p. 929-933
  • DOI: 10.1016/0196-8904(95)00279-0