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Type: Journal article
Title: The relative performance of alternative oxygen carriers for liquid chemical looping combustion and gasification
Author: Sarafraz, M.
Jafarian, M.
Arjomandi, M.
Nathan, G.
Citation: International Journal of Hydrogen Energy, 2017; 42(26):16396-16407
Publisher: Elsevier
Issue Date: 2017
ISSN: 0360-3199
Statement of
M. M. Sarafraz, Mehdi Jafarian, Maziar Arjomandi, Graham J. Nathan
Abstract: The relative performance of different potential liquid oxygen carriers within a novel system that can be configured for either chemical looping gasification or combustion is assessed. The parameters considered here are the melting temperature, the Gibbs free energy, reaction enthalpy, exergy and energy flows, syngas quality and temperature difference between the two reactors. Results show that lead, copper and antimony oxides are meritorious candidates for the proposed systems. Antimony oxide was found to offer strong potential for high quality syngas production because it has a reasonable oxygen mass ratio for gasification. A sufficiently low operating temperature to be compatible with concentrated solar thermal energy and a propensity to generate methane. In contrast, copper and lead oxides offer greater potential for liquid chemical looping combustion because they have higher oxygen mass ratio and a higher operating temperature, which enables better efficiency from a power plant. For all three metal oxides, the production of methane via the undesirable methanation reaction is less than 2% of the product gasses for all operating temperatures and an order of magnitude lower for lead.
Keywords: Chemical looping combustion; chemical looping gasification; energetic analysis; thermodynamic equilibrium analysis; syngas production
Rights: © 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
DOI: 10.1016/j.ijhydene.2017.05.116
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Chemical Engineering publications

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