以CuCl₂为活性组分、非贵金属SnCl₄和BiCl₃为助剂,采用等体积浸渍法制备多元铜基催化剂。结果表明,在反应温度150℃、V(HCl)/V(C₂H₂)=1.10、乙炔空速为315 h^-1的条件下,10% CuCl₂-5% SnCl₄-1% BiCl₃/AC三元催化剂的初始活性达到50%;乙炔氢氯化反应9.5 h后,催化活性依然超过相同条件下的汞催化剂。BET、H₂-TPR和XPS表征分析结果表明,乙炔氢氯化反应发生在催化剂微孔内;Sn助剂提高了催化剂的抗还原性,稳定了Cu活性组分的价态,从而改善了铜基催化剂的初始活性。

Multi-component Cu-based catalysts are prepared via incipient impregnation method with CuCl₂ as active component,with SnCl₄ and BiCl₃ as additives.It is shown that the initial activity of 10% CuCl₂-5% SnCl₄-1% BiCl₃/AC catalyst reaches 50% for acetylene hydrochlorination when reaction temperature is at 150℃,V(HCl)/V(C₂H₂)=1.10 and acetylene space velocity is 315 h^-1.After 9.5 h of acetylene hydrochlorination reaction,the catalytic activity of the catalyst still exceeds that of mercury catalyst under the same conditions.The results by BET,H₂-TPR and XPS characterization show that acetylene hydrochlorination reaction takes place in the micropores of the catalyst,and Sn promoter improves the reduction resistance of the catalyst and stabilizes the valence state of Cu active component,thus improving the initial activity of the Cu-based catalyst.

陈方永(1997-),男,硕士研究生,研究方向为工业催化,1173647363@qq.com。