Abstract
A palladium catalyst (0.5 wt% of Pd) supported Y zeolite (HY) (Pd/HY) was prepared by ultrasonic-assisted impregnation. The potential of the catalyst for acetylene hydrochlorination was explored in a fixed-bed reactor at 160 °C, V(HCl)/V(C2H2) = 1.25 and gas hourly space velocity of C2H2 = 110 h−1. The catalyst exhibited high catalytic properties of acetylene conversion >95 % and vinyl chloride selectivity >90 %. The fresh and used catalysts were characterized by scanning electron microscope (SEM), X-ray powder diffraction (XRD), energy dispersive spectrometer (EDS), Brunauer-Emmett-Teller (BET) analyzer, NH3 temperature programmed desorption (NH3-TPD) and infrared spectroscopy (IR). Analysis results showed that the active component Pd is uniformly dispersed on the Y zeolite surface. The generation of polymers, carbon depositions, and the decrease of catalyst acidity might course the deactivation of the catalyst.
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Acknowledgments
This work has been supported by National Natural Science Foundation of China (Grant No. 21263025), National Key Basic Research Program of China (973 Program: 2012CB626810) and Autonomous Region science and technology Program of Xinjiang Uygur Autonomous Region, China (201215141).
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Wang, L., Wang, F., Wang, J. et al. Hydrochlorination of acetylene to vinyl chloride over Pd supported on zeolite Y. Reac Kinet Mech Cat 110, 187–194 (2013). https://doi.org/10.1007/s11144-013-0580-3
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DOI: https://doi.org/10.1007/s11144-013-0580-3