Mo-based catalysts are widely used for the SO2 hydrogenation process.
However, the detailed reaction mechanism is still unclear and some
details should be further supplemented. In this paper, the SO2
hydrogenation processes over the Mo-based catalyst were systematically
studied. Several technologies including temperature-programmed
experiments, isotope-tracing experiment, FTIR spectra and switching
experiment were adopted to investigate the reaction steps. The results
indicated that during the SO2 hydrogena