Abm. Heesink et Wpm. Vanswaaij, THE SULFIDATION OF CALCINED LIMESTONE WITH HYDROGEN-SULFIDE AND CARBONYL SULFIDE, Chemical Engineering Science, 50(18), 1995, pp. 2983-2996
The sulphidation of calcined limestone with H2S, COS and mixtures of H
2S and COS was studied in a thermogravimetric analyzer at temperatures
between 500 and 700 degrees C. The applied H2S- and COS-pressures cor
responded with those in coal gas produced by modern coal gasifiers, i.
e. 50-12,000 Pa for H2S and 50-1000 Pa for COS. The reaction orders in
H2S and COS as well as the activation energies of the involved reacti
ons were determined. The mechanism of sulphidation was examined by sim
ulating measured conversion vs time behaviour with the grain size dist
ribution model of Heesink et al. (1993, Chem. Engng J. 53, 25-37).