Sequential capture of CO2 and SO2 in a pressurized TGA simulating FBC conditions.
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.
Sun
Ping
P
Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, Canada.
Grace
John R
JR
Lim
C Jim
CJ
Anthony
Edward J
EJ
D000393:Air Pollutants / Q000737:chemistry*; D002119:Calcium Carbonate; D002245:Carbon Dioxide / Q000737:chemistry*; D017745:Incineration / Q000295:instrumentation*; D008274:Magnesium; D013458:Sulfur Dioxide / Q000737:chemistry*; D013818:Thermogravimetry / Q000295:instrumentation*
D000393:Air Pollutants; D013458:Sulfur Dioxide; D002245:Carbon Dioxide; D002119:Calcium Carbonate; D008274:Magnesium; C028042:calcium magnesium carbonate