Abstract
Au/TS-1 catalyst was prepared by deposition-precipitation method. The catalytic performance of the modified catalyst for propylene direct vapour-phase epoxidation was investigated by modifying the support TS-1 and adding promoters during the preparation of the catalyst. Combined with the characterization results of X-ray powder diffraction (XRD), ultraviolet-visible diffuse reflectance (UV-Vis) and infrared diffuse reflectance (FT-IR), it was found that the activity of propylene epoxidation could be significantly improved by modified catalyst. The results showed that the catalyst modified by Sn increased the conversion of propylene and the selectivity of propylene oxide on the, which might be due to the coordination effect caused by the addition of Sn. The pore volume and specific surface area of Au/TS-1 have little effect on the vapour-phase epoxidation reaction, and the decomposition ability of Au/TS-1 is an important factor affecting its reactivity.
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