Calcium oxide based sorbents for adsorption of CO2 at high temperatures

Hong Lu, Ettireddy P. Reddy, Panagiotis Smirniotis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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).

Original languageEnglish (US)
Title of host publication05AIChE
Subtitle of host publication2005 AIChE Annual Meeting and Fall Showcase, Conference Proceedings
PublisherAmerican Institute of Chemical Engineers
ISBN (Print)0816909962, 9780816909964
StatePublished - Jan 1 2005
Externally publishedYes
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Publication series

NameAIChE Annual Meeting Conference Proceedings
Volume2005

Other

Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
CountryUnited States
CityCincinnati, OH
Period10/30/0511/4/05

ASJC Scopus subject areas

  • Energy(all)

Fingerprint Dive into the research topics of 'Calcium oxide based sorbents for adsorption of CO<sub>2</sub> at high temperatures'. Together they form a unique fingerprint.

  • Cite this

    Lu, H., Reddy, E. P., & Smirniotis, P. (2005). Calcium oxide based sorbents for adsorption of CO2 at high temperatures. In 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase, Conference Proceedings (AIChE Annual Meeting Conference Proceedings; Vol. 2005). American Institute of Chemical Engineers.