| HgCl2 catalyst is usually used for acetylene hydrochlorination process, but Hg will cause serious environmental pollution. Therefore, the development of mercury-free catalysts is crucial. In this study, activated carbon-supported platinum-based catalysts Pt-M/AC (M=Cu, K, Sn, etc.) with different metal promoters were prepared by the impregnation method, and the effects of metal promoters on the catalytic performance of platinum-based catalysts were investigated in acetylene hydrochlorination. The prepared catalysts were characterized by using N2 physical adsorption-desorption, XRD and XPS. The results showed that the introduction of metal promoters could improve the performance of the catalysts and that Pt-Cu/AC exhibited the best performance. The addition of metal promoters helps to inhibit carbon deposition and pore collapse, improves the stability of the catalysts, and extends their service life. Metal promoter, Cu in particular, prevents the agglomeration of active metal Pt, disperses the active components, and anchors Pt on the surface of activated carbon. Additionally, the addition of Cu can stabilize the valence state of active species, maintain the activity of the catalyst, and improve its stability. |
