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Effects of Multiple-Cycle Operation and SO2 Concentration on CO2 Capture Capacity of Three Limestones in a Fluidized Bed Reactor  

Ryu, Ho-Jung (Clean Energy Research Center, Korea Institute of Energy Research)
Publication Information
Applied Chemistry for Engineering / v.17, no.1, 2006 , pp. 44-51 More about this Journal
Abstract
Effects of multiple-cycle operation and $SO_2$ concentration on $CO_2$ capture characteristics of three limestones were investigated in a fluidized bed reactor. For each of these sorbents, the measured $CO_2$ capture capacity decreased as the number of cycles increased and as the $SO_2$ concentration increased. On the other hand, the $SO_2$ capture increased with the increased number of cycles and the $SO_2$ concentration. The total calcium utilization decreased as the number of cycles increased, but the effect of $SO_2$ concentrations on the total calcium utilization depended on the type of limestone. For Strassburg limestone, the total calcium utillization decreased with increasing $SO_2$ concentration. However, for Luscar and Danyang limestones, the total calcium utilization was almost independent of $SO_2$ concentration for the range investigated. The results showed that $SO_2$ in flue gas reduced the $CO_2$ capture capacity of limestone and that the sulfation pattern affected the $CO_2$ capture capacity.
Keywords
$CO_2$ capture; limestone; $SO_2$; fluidized bed; sulfation pattern;
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