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  • Title: Sequential capture of CO2 and SO2 in a pressurized TGA simulating FBC conditions.
    Author: Sun P, Grace JR, Lim CJ, Anthony EJ.
    Journal: Environ Sci Technol; 2007 Apr 15; 41(8):2943-9. PubMed ID: 17533862.
    Abstract:
    Four FBC-based processes were investigated as possible means of sequentially capturing SO2 and CO2. Sorbent performance is the key to their technical feasibility. Two sorbents (a limestone and a dolomite) were tested in a pressurized thermogravimetric analyzer (PTGA). The sorbent behaviors were explained based on complex interaction between carbonation, sulfation, and direct sulfation. The best option involved using limestone or dolomite as a SO2-sorbent in a FBC combustor following cyclic CO2 capture. Highly sintered limestone is a good sorbent for SO2 because of the generation of macropores during calcination/carbonation cycling.
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