Calcium looping for CO2 capture at a constant high temperature

Yin, Junjun and Qin, Changlei and Feng, Bo and Ge, Lei and Luo, Cong and Liu, Wenqiang and An, Hui (2013) Calcium looping for CO2 capture at a constant high temperature. Energy & Fuels, 28 (1). pp. 307-318. ISSN 0887-0624

Abstract

A calcium looping process using calcium-oxide-based sorbent for CO2 capture was demonstrated to operate at a constant high temperature in this work. First the operating temperature window of the process was determined by investigating the quasi-equilibrium and kinetics of carbonation/calcination of synthetic CaO-based sorbents. The results indicate that the process would be suitable to operate within 750−840 °C when the CO2 concentration is higher than 15%. Subsequently, the process was demonstrated in a lab-scale fixed-bed reactor in 20% CO2 (N2 balance) by examining the temperature variations in the synthetic CaO-based sorbent particles. The effects of operating variables (such as operating temperature, switching time, and sample type) on the cyclic temperature variation were investigated. It was observed that the process operated in a highly stable manner over 100 cycles at 770 °C with the switching time of 1 min in both carbonation and calcination modes. The cost of calcium looping could be reduced significantly by operating at a constant high temperature.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: No Faculty
Date Deposited: 08 May 2017 04:35
Last Modified: 08 May 2017 04:35
Uncontrolled Keywords: carbonation and calcinations; cyclic temperatures; fixed-bed reactors; Operating temperature; Operating variables; quasi-equilibrium; sorbent particles; temperature variation calcium; temperature distribution; carbon dioxide
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090401 Carbon Capture Engineering (excl. Sequestration)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/ef401399c
URI: http://eprints.usq.edu.au/id/eprint/31140

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