Preparation of P-Modified Cu/USY Catalyst and Its Catalytic Performance for Acetylene Hydrochlorination
1. Key Laboratory of Oil and Gas Fine Chemicals of Education and Xinjiang Uyghur Autonomous Region, College of
Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China;
2. Xinjiang De’an Environmental Protection Technology Co Ltd, Urumqi 830026, China
Abstract：A series of P (H3PO4 as phosphate source) modified Cu/USY catalysts were prepared by ultrasonic-assisted impregnation method using USY molecular sieve as catalyst support and CuCl2 as active component precursor, respectively. The catalytic performances for acetylene hydrochlorination were investigated in a fixed-bed reactor. The results suggested that P-Cu/USY catalyst had a better catalytic performance at a total gas hourly space of 119 h-1, volume ratio of HCl to C2H2 of 1.29 and temperature 160 ℃. When the mass fraction of phosphate was 2 %, the initial activity of the catalyst could reach above 98.68 % and it could still maintain 57.86% even after 9 h reaction. The catalysts were characterized by the techniques of scanning electron microscopy (SEM), specific surface area test (BET), thermogravimetric analysis (TG), X-ray diffraction (XRD), surface elemental analysis (EDS) and X-ray photoelectron spectroscopy (XPS). It was speculated that the presence of phosphate species was favorable to the inhibition of the carbon deposition, the Cu loss and the reduction of Cu2+ active component on the catalyst surface, hence enhancing the initial activity of Cu/USY catalysts. All the findings provided a new idea for the study of mercury-free zeolites catalysts for acetylene hydrochlorination.
Wang Lu1,Yan Haijun1,Lian Lizhen1 et al. Preparation of P-Modified Cu/USY Catalyst and Its Catalytic Performance for Acetylene Hydrochlorination[J]. 化学反应工程与工艺, 2018, 34(3): 254-260.
