(560hc) In Situ Synthesis of Zn-Doped Ordered Mesoporous Carbon: Structure Characterization and Catalytic Performance Evaluation

Zinc acetate/activated carbon as a traditional catalyst was used for the production of vinyl acetate (VAc). However, the yield of VAc is low due to the rapid decline of activity and poor stability of zinc acetate/activated carbon catalyst. In the present study, to improve the reaction performance and the service life of catalyst, Zn-doped ordered mesoporous carbon (Zn-OMC) and HAc modified Zn-OMC were separately synthesized by a new in situ method. The crystal structure, pore properties, thermal stability and surface morphology of catalysts were characterized by XRD, N₂ adsorption-desorption isotherms analysis, TG, TEM, and SEM. The catalytic performance of Zn-OMC and HAc modified Zn-OMC for the vapor-phase synthesis of VAc from acetylene was tested using a fixed-bed reactor. The effects of temperature and zinc content of catalysts on the reaction activity were examined in detail. The results showed that HAc modified Zn-OMC catalysts have mesoporous channels, large specific surface area, high thermal stability, and high selectivity to VAc.