Thermal and mechanical behaviour of oxygen carrier materials for chemical looping combustion in a packed bed reactor

M. Jacobs, J. Van Noyen, Y. Larring, M. Mccann, M. Pishahang, S. Amini, M. Ortiz, F. Galluci, M.V. Sint-Annaland, D. Tournigant, E. Louradour and F. Snijkers

Applied Energy, 2015, vol. 157, issue C, 374-381

Abstract: Chemical looping combustion (CLC) is a promising carbon capture technology where cyclic reduction and oxidation of a metallic oxide, which acts as a solid oxygen carrier, takes place. With this system, direct contact between air and fuel can be avoided, and so, a concentrated CO2 stream is generated after condensation of the water in the exit gas stream. An interesting reactor system for CLC is a packed bed reactor as it can have a higher efficiency compared to a fluidized bed concept, but it requires other types of oxygen carrier particles. The particles must be larger to avoid a large pressure drop in the reactor and they must be mechanically strong to withstand the severe reactor conditions. Therefore, oxygen carriers in the shape of granules and based on the mineral ilmenite were subjected to thermal cycling and creep tests. The mechanical strength of the granules before and after testing was investigated by crush tests. In addition, the microstructure of these oxygen particles was studied to understand the relationship between the physical properties and the mechanical performance.

Keywords: Chemical looping combustion; Packed bed reactor; Oxygen carrier; Mechanical behaviour (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1016/j.apenergy.2015.04.053

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