The kinetics of catalytic incineration of c₂H₅SH and (CH₃)₂S₂ over a Pt/Al₂O₃ Catalyst

Catalytic incineration is one of the cost-effective technologies to solve the troublesome VOCs. However, some sulfur containing VOCs, such as ethyl mercaptan and dimethyl disulfide, 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, such as power-rate law, Mars and Van Krevelen model, and Langmuir-Hinshelwood model were used to analyze the results. A differential reactor design was used for best fit of kinetic models in this study. The results show that the Langmuir-Hinshelwood model is feasible to describe the catalytic incineration of both C₂H₅SH and (CH₃)₂S₂. This suggests that the chemical adsorption of O₂ molecule is important in the process of catalytic incineration of C₂H₅SH and (CH₃)₂S₂.