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Dolomite study for in situ CO 2 capture for chemical looping reforming
Pimenidou, Panagiota Dupont, V.
Pimenidou, Panagiota
Dupont, V.
Publication Date
2015
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Peer-Reviewed
yes
Open Access status
Accepted for publication
2013-09-10
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Abstract
The non-isothermal kinetic and thermal behaviour of a naturally formed dolomite in conditions that approach in situ CO2
capture in chemical looping reforming, were investigated. The performance of this dolomite was studied at micro-scale in
‘dry’ conditions, as well as at macro-scale in ‘dry’ and ‘wet’ conditions to investigate the effects of scale (3 mg, 2.5 g), partial
pressures of CO2 (<15 kPa) and steam, and deactivation upon limited cycling. The carbonation and calcination kinetics
were modelled using an improved iterative Coats–Redfern method. Increasing CO2 partial pressures on the ‘dry’ macroscale
exacerbated the experimental carbonation conversions in an inversely proportional trend when compared with those
at micro-scale. The presence of steam had a positive effect on CO2 chemisorption. Steam had a negligible influence on the
calcination activation energies. The activation energies of carbonation were increased for the experiments at the highest CO2
partial pressures under wet conditions.
Version
Accepted manuscript
Citation
Pimenidou P and Dupont V (2015) Dolomite study for in situ CO 2 capture
for chemical looping reforming. International Journal of Ambient Energy. 36(4): 170-182.
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Article