Calcium precursors for the production of CaO sorbents for multicycle CO2 capture

Liu, Wenqiang, Low, Nathanael W. L., Feng, Bo, Wang, Guoxiong and Diniz da Costa, Joao C. (2010) Calcium precursors for the production of CaO sorbents for multicycle CO2 capture. Environmental Science & Technology, 44 2: 841-847. doi:10.1021/es902426n


Author Liu, Wenqiang
Low, Nathanael W. L.
Feng, Bo
Wang, Guoxiong
Diniz da Costa, Joao C.
Title Calcium precursors for the production of CaO sorbents for multicycle CO2 capture
Formatted title
Calcium precursors for the production of CaO sorbents for multicycle CO2 capture
Journal name Environmental Science & Technology   Check publisher's open access policy
ISSN 0013-936X
1520-5851
Publication date 2010-01-15
Year available 2009
Sub-type Article (original research)
DOI 10.1021/es902426n
Volume 44
Issue 2
Start page 841
End page 847
Total pages 7
Place of publication Washington, DC, U.S.A.
Publisher American Chemical Society
Collection year 2011
Language eng
Subject C1
090401 Carbon Capture Engineering (excl. Sequestration)
859802 Management of Greenhouse Gas Emissions from Electricity Generation
Formatted abstract
A screening of potential calcium precursors for the production of CaO sorbents for CO2 capture at high temperature was conducted in this work. The precursors studied include microsized calcium carbonate (CC-CaO), calcium hydroxide (CH-CaO), nanosized (<70 nm) calcium carbonate (CC70 nm-CaO), nanosized (<160 nm) calcium oxide (CaO160 nm-CaO), calcium acetate hydrate (CA-CaO), calcium L-lactate hydrate (CL-CaO), calcium formate (CF-CaO), calcium citrate tetrahydrate (CCi-CaO), and calcium D-gluconate monohydrate (CG-CaO), The capture capability of these sorbents was investigated using a thermogravimetric analyzer (TGA) for multiple capture cycles. CG-CaO exhibited the best capacity for capturing CO2 with a 1-min conversion of 65.9% and a 30-min conversion of 83.8% at the ninth cycle. Subsequently, a further parametric study was conducted to examine the effect of reaction conditions such as reaction temperature (550-750 degrees C) and CO2 gas concentration (1-15%) on the capture capacity of CG-CaO. The sorbent CG-CaO also showed a much lower decomposition temperature and higher predicted residual conversion after prolonged cycles, compared with CC-CaO.
Copyright © 2009 American Chemical Society


Keyword Carbon-dioxide
Fluidized-bed
Looping cycle
DIifferent limestones
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Publication Date (Web): December 23, 2009

 
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Created: Sun, 24 Jan 2010, 00:04:49 EST