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Citation: LI Meng-Yun, FU Ting-Jun, WANG Yu-Chun, YAN Li-Fei, LI Zhong. Influence of H+ Contents of Support on CuY Catalyst for Catalytic Performances of Oxidative Carbonylation of Methanol[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(11): 1951-1958. doi: 10.11862/CJIC.2016.258 shu

Influence of H+ Contents of Support on CuY Catalyst for Catalytic Performances of Oxidative Carbonylation of Methanol

  • 1.

    Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China

  • Corresponding author: LI Zhong, 
  • Received Date: 5 March 2016
    Available Online: 30 August 2016

    Fund Project:

  • A series of Y zeolite supported Cu catalysts (CuY) with Cu loading of 6.4% were prepared by wet impregnation method and investigated in oxidative carbonylation of methanol. The microstructure and surface properties of the catalysts were characterized by X-ray diffraction (XRD), H2-temperature program reduction (H2-TPR), NH3-temperature program desorption (NH3-TPD), transmission electron microscope(TEM) techniques. With the increase of H+ content, the Y zeolite supports were more conductive to the cation exchangment with Cu2+, leading to well dispersed Cu species in cages. Above all, the non-exchanged Na+ of Y zeolite resulted in more Cu species located in the super cages. After calcination, the copper species converted into Cu+, which enhanced the catalytic activity of oxidative carbonylation of methanol. The introduction of Cu species into Y zeolite produced moderate acid sites and the amount of acid was also increased with the increase of Cu species located in the cages, As a result, the reaction product distribution varied and the selectivity of DMC decreased with the increase of H+ content. The CuY catalyst prepared by incipient-wetness impregnation method gave 92.3% selectivity of DMC, whereas the Cu catalyst supported on NaY zeolite by wet impregnation method gave 82.4% selectivity of DMC and high space-time yield (STY) of DMC, 109.1 mg·g-1·h-1.
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