TY - GEN
T1 - Calcium oxide based sorbents for adsorption of CO2 at high temperatures
AU - Lu, Hong
AU - Reddy, Ettireddy P.
AU - Smirniotis, Panagiotis
PY - 2005
Y1 - 2005
N2 - Ca(NO3)2·4H2O, CaO, Ca(OH)2, CaCO3, and Ca(CH3COO)2·H2O were used as precursors for synthesis of calcium oxide sorbents of CO2. Calcium acetate based sorbents led to the best adsorption performance of CO2. At 600°-800°C, this sorbent exhibited high adsorption of CO2, 90% of which were achieved at the first 15 min of adsorption period. Calcium acetate based sorbents also showed great regenerability in multi adsorption-desorption cycles. After 25 cyclic adsorptions/desorption, the sorbent still had a conversion of 64% during adsorption of CO2. High conversion and good regenerability of calcium acetate based sorbents are due to relatively large volume of mesopores and macropores produced during multi steps decomposition of synthesis. Sorbents from other precursors showed poorer performance since they had smaller pores, less pore volume and lower BET surface area. These high performance calcium oxide sorbents have great potential for numerous high temperature applications such as fuel cells, carbon sequestration, novel reactors, and coal gasification etc. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).
AB - Ca(NO3)2·4H2O, CaO, Ca(OH)2, CaCO3, and Ca(CH3COO)2·H2O were used as precursors for synthesis of calcium oxide sorbents of CO2. Calcium acetate based sorbents led to the best adsorption performance of CO2. At 600°-800°C, this sorbent exhibited high adsorption of CO2, 90% of which were achieved at the first 15 min of adsorption period. Calcium acetate based sorbents also showed great regenerability in multi adsorption-desorption cycles. After 25 cyclic adsorptions/desorption, the sorbent still had a conversion of 64% during adsorption of CO2. High conversion and good regenerability of calcium acetate based sorbents are due to relatively large volume of mesopores and macropores produced during multi steps decomposition of synthesis. Sorbents from other precursors showed poorer performance since they had smaller pores, less pore volume and lower BET surface area. These high performance calcium oxide sorbents have great potential for numerous high temperature applications such as fuel cells, carbon sequestration, novel reactors, and coal gasification etc. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).
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M3 - Conference contribution
AN - SCOPUS:84916885080
SN - 0816909962
SN - 9780816909964
T3 - AIChE Annual Meeting Conference Proceedings
BT - 05AIChE
PB - American Institute of Chemical Engineers
T2 - 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
Y2 - 30 October 2005 through 4 November 2005
ER -