The CO₂ and SO₂ capture capability of two Greek limestones during repeated thermal cycles
by P. Basinas, P. Grammelis, J.R. Grace, C.J. Lim, G. Skodras, E. Kakaras, G.P. Sakellaropoulos
International Journal of Global Warming (IJGW), Vol. 1, No. 1/2/3, 2009

Abstract: In the present study, two Greek limestones from the Megalopolis and Florina areas were used to capture CO₂ and SO₂. The regeneration ability and decay of the limestone samples were investigated through sorption-calcination cycles in a thermogravimetric analyser operated at ambient pressure. The effects of the sorption time (3, 8 and 30 min), reaction temperature (750°C and 850°C) and particle size (38-53, 150-250 and 500-800 μm) on the sorbent performance were examined. The two limestones demonstrated similar CO₂ capture capability. Florina limestone decayed less after a specific number of cycles. When the particle size of the samples increased and the carbonation temperature was reduced, less CO₂ capture was observed for both samples. The presence of SO₂ inhibited the sorption ability of both limestones. Florina limestone was found to exhibit a higher sorption ability and lower decay when CO₂ and SO₂ were present simultaneously.

Online publication date: Tue, 14-Jul-2009

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