Sulfation Kinetics of Calcined Limestones/Dolomites in a Thermogravimetric Analyzer: Experiment, Modeling, and Simulation

摘要

Experiments have been conducted with a thermogravimetric analyzer (TGA) for sulfation of various calcined limestone/dolomite sorbents under reaction conditions similar to those in a fluidized-bed combustor. The volume reaction model has been modified by the present authors to account for the heterogeneous sulfation reaction. Effects of particle size and sulfur dioxide concentration on the extent of conversion have been analyzed, based on the model. Also, numerical simulation has been made of the effect of peeling-off of the particle outer surface during sulfation. Model verification has been conducted using experimental data obtained in this study and also experimental data available in the literature. 21 figures, 3 tables. (ERA citation 08:031092)