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Title: Method and system for capturing carbon dioxide and/or sulfur dioxide from gas stream

Abstract

The present invention provides a system for capturing CO.sub.2 and/or SO.sub.2, comprising: (a) a CO.sub.2 and/or SO.sub.2 absorber comprising an amine and/or amino acid salt capable of absorbing the CO.sub.2 and/or SO.sub.2 to produce a CO.sub.2- and/or SO.sub.2-containing solution; (b) an amine regenerator to regenerate the amine and/or amino acid salt; and, when the system captures CO.sub.2, (c) an alkali metal carbonate regenerator comprising an ammonium catalyst capable catalyzing the aqueous alkali metal bicarbonate into the alkali metal carbonate and CO.sub.2 gas. The present invention also provides for a system for capturing SO.sub.2, comprising: (a) a SO.sub.2 absorber comprising aqueous alkali metal carbonate, wherein the alkali metal carbonate is capable of absorbing the SO.sub.2 to produce an alkali metal sulfite/sulfate precipitate and CO.sub.2.

Inventors:
; ;
Issue Date:
Research Org.:
Univ. of California, Oakland, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1143636
Patent Number(s):
8771403
Application Number:
13/757,550
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02A - TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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DOE Contract Number:  
AC02-05CH11231
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Feb 01
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Chang, Shih-Ger, Li, Yang, and Zhao, Xinglei. Method and system for capturing carbon dioxide and/or sulfur dioxide from gas stream. United States: N. p., 2014. Web.
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Chang, Shih-Ger, Li, Yang, & Zhao, Xinglei. Method and system for capturing carbon dioxide and/or sulfur dioxide from gas stream. United States.
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Chang, Shih-Ger, Li, Yang, and Zhao, Xinglei. Tue . "Method and system for capturing carbon dioxide and/or sulfur dioxide from gas stream". United States. https://www.osti.gov/servlets/purl/1143636.
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@article{osti_1143636,
title = {Method and system for capturing carbon dioxide and/or sulfur dioxide from gas stream},
author = {Chang, Shih-Ger and Li, Yang and Zhao, Xinglei},
abstractNote = {The present invention provides a system for capturing CO.sub.2 and/or SO.sub.2, comprising: (a) a CO.sub.2 and/or SO.sub.2 absorber comprising an amine and/or amino acid salt capable of absorbing the CO.sub.2 and/or SO.sub.2 to produce a CO.sub.2- and/or SO.sub.2-containing solution; (b) an amine regenerator to regenerate the amine and/or amino acid salt; and, when the system captures CO.sub.2, (c) an alkali metal carbonate regenerator comprising an ammonium catalyst capable catalyzing the aqueous alkali metal bicarbonate into the alkali metal carbonate and CO.sub.2 gas. The present invention also provides for a system for capturing SO.sub.2, comprising: (a) a SO.sub.2 absorber comprising aqueous alkali metal carbonate, wherein the alkali metal carbonate is capable of absorbing the SO.sub.2 to produce an alkali metal sulfite/sulfate precipitate and CO.sub.2.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {7}
}
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