The kinetics of the catalytic incineration of CH3SH and (CH3)2S over a Pt/Al2O3 catalyst

Catalytic incineration is one of the cost-effective technologies to solve the problem of Volatile Organic Compounds (VOCs). However, some sulfur-containing VOCs, such as methyl mercaptan and dimethyl sulfide, may deactivate the Pt catalyst that is commonly used in the catalytic incineration process. The catalytic incineration of these compounds over a Pt/Al2O3 catalyst was carried out in a bench scale catalytic incinerator. Three kinetic models were used to analyze the results: the power-rate law, the Mars and Van Krevelen model and the Langmuir-Hinshelwood model. A differential reactor design was used for best fit of kinetic models in this study. The results showed that the Langmuir-Hinshelwood model is suitable for the catalytic incineration of both CH3SH and (CH)(2)S. This suggests that the adsorption of VOC or O-2 molecule is important in the process of catalytic incineration of CH3SH and (CH3)(2)S. (C) 1998 Elsevier Science B.V.