Kinetics of sulfer dioxide uptake on supported cerium oxide sorbents
- 1 May 1992
- journal article
- Published by Wiley in Environmental Progress
- Vol. 11 (2) , 98-103
- https://doi.org/10.1002/ep.670110215
Abstract
A thermogravimetric technique has been used to evaluate the apparent rate of SO2absorption by ceria supported on alumina. A kinetic model for the sulfation of the CeO2/Al2O3sorbent has been developed that is first order with respect to the partial pressure of SO2and first order with respect to the fractional unreacted cerium oxide on the sorbent. The reaction was also found to be zero order with respect to the oxygen and water vapor content of the gas over a range of concentrations that might reasonably be encountered in actual flue gas streams. CeO2/Al2O3sorbent is being studied at the Pittsburgh Energy Technology Center as a potential new sorbent for simultaneous removal of 90+% of both SO2and NOxfrom coal combustion flue gas in a dry, regenerable process.Keywords
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