Catalytic Materials

Optimization and analysis of n(Ni)/n(Ni+Mo) of heavy aromatics to light aromatics catalyst

  • Hang LIU ,
  • Jiazhong ZANG ,
  • Jingxin FAN ,
  • Chunlei GUO ,
  • Fengying JIN ,
  • Xunzhi ZHAO
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  • 1. CenerTech Tianjin Chemical Research and Design Institute Co. Ltd.,CNOOC,Tianjin 300131,China
    2. Tianjin Refinery Catalytic Technology Engineering Center

Received date: 2021-03-09

  Online published: 2021-12-16

Abstract

In order to further improve the activity and stability of heavy aromatic light catalyst,four catalysts with different n(Ni)/n(Ni+Mo) atomic ratios were prepared by incipient-wetness impregnation method with zeolite β as support.The total mass of the metal was same.The catalysts were characterized by XRD,NH3-TPD,H2-TPR,H2-TPD and TG-DTG.The results showed that the acid content and acid strength of the four catalysts were similar,and when the n(Ni)/n(Ni+Mo) atomic ratio was of standard+0.2,the interaction between Mo and the support was the weakest,with the maximum adsorption capacity of H2 and the minimum carbon deposition.Four catalysts were evaluated by using reforming C10+ heavy aromatics.The results showed that the catalyst with the n(Ni)/n(Ni+Mo) atomic ratio of standard+0.2 had the optimal catalytic activity and stabi-lity.The above results showed that the key factor affecting the activity and stability of catalyst was the amount of H2 adsorption,the more H2 was adsorbed,the more obvious the hydrogen overflow effect was on metal surface.The precursor of carbon deposition was eliminated in time by overflow hydrogen,thus,the hydrogenation active center of the catalyst was protected from carbon deposition,it was helpful to keep the catalyst stable at high activity.

Cite this article

Hang LIU , Jiazhong ZANG , Jingxin FAN , Chunlei GUO , Fengying JIN , Xunzhi ZHAO . Optimization and analysis of n(Ni)/n(Ni+Mo) of heavy aromatics to light aromatics catalyst[J]. Inorganic Chemicals Industry, 2021 , 53(12) : 140 -145 . DOI: 10.19964/j.issn.1006-4990.2021-0137

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