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Technologies 2016, 4(2), 11; doi:10.3390/technologies4020011

The Effects of Thermal Treatment and Steam Addition on Integrated CuO/CaO Chemical Looping Combustion for CO2 Capture

1
Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
2
CanmetENERGY, Natural Resources Canada, 1 Haanel Drive, Ottawa, ON K1A 1M1, Canada
3
Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Street, Ottawa, ON K1N 6N5, Canada
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Gustavo A. Fimbres Weihs
Received: 26 February 2016 / Revised: 24 March 2016 / Accepted: 31 March 2016 / Published: 7 April 2016
(This article belongs to the Special Issue Carbon Capture and Storage (CCS) Technologies)
View Full-Text   |   Download PDF [3521 KB, uploaded 7 April 2016]   |  

Abstract

The combination of Chemical Looping Combustion (CLC) with Calcium Looping (CaL) using integrated pellets is an alternative CO2 capture process to the current amine-based sorbent processes, but the pellets lose sorption capacity over time. In this paper, the deactivation behavior of CaO, CuO and CuO/CaO integrated pellets used for multiple (16–20) cycles in a thermogravimetric analyzer was studied. The impact of thermal treatment and the presence of steam on the deactivation were also investigated. Nitrogen physisorption and scanning electron microscopy/energy-dispersive X-ray analysis were used to characterize the pellets. The analysis revealed significant migration of the copper to the surface of the composite pellets, which likely suppressed carbonation capacity by reducing the accessibility of the CaO. While thermal pre-treatment and steam addition enhanced the performance of the base CaO pellets, the former led to cracks in the pellets. In contrast, thermal pretreatment of the CuO/CaO composite pellets resulted in worse CLC and CaL performance. View Full-Text
Keywords: carbon capture; calcium oxide; copper oxide; calcium looping combustion; thermal treatment; steam carbonation carbon capture; calcium oxide; copper oxide; calcium looping combustion; thermal treatment; steam carbonation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Recio, A.; Liew, S.C.; Lu, D.; Rahman, R.; Macchi, A.; Hill, J.M. The Effects of Thermal Treatment and Steam Addition on Integrated CuO/CaO Chemical Looping Combustion for CO2 Capture. Technologies 2016, 4, 11.

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