Enhanced Effect of SO2-Induced Pt/CeZrTiO2 on the Catalytic Oxidation of C2H6

The role of SO2 in the catalytic oxidation of light hydrocarbons remains controversial, especially in terms of its effects on catalyst performance and reaction pathways. In this study, the Pt/CeZrTiO2 catalyst was synthesized to explore the influence of SO2 during the catalytic combustion of ethane. The results revealed two distinct roles of SO2: (1) SO2 interacts with the catalyst, forming new active structures that facilitate C-H bond cleavage, alter the ethane oxidation pathway, and enhance low-temperature C2H6 conversion. (2) SO2 participates in the reaction process, replenishing active sites and maintaining a balance between two ethane oxidation pathways, leading to improved high-temperature C2H6 conversion and enhanced catalytic combustion efficiency. This study provides new insights into the role of SO2 in modulating catalyst properties and reaction pathways for efficient light hydrocarbon combustion.