Chemical Papers

, Volume 70, Issue 6, pp 769–776 | Cite as

Initiation behaviour in hydrogenation of pyrolysis gasoline over presulphided Ni-Mo-Zn/Al2O3 catalyst

  • Zi-Xia Li
  • Wei Sun
  • Shun-Qin Liang
  • Huan-Ling Song
Original Paper
  • 13 Downloads

Abstract

A presulphided treatment was applied to the oxidic Ni-Mo-Zn/Al2O3 catalyst (nickel catalyst) in order to avoid thermal run-away during initiation of the hydrogenation of pyrolysis gasoline. The physico-chemical properties of the prepared oxidic nickel catalyst, the reduced and passivated (RP) nickel catalyst and the sulphided (RPS) nickel catalyst were characterised using N2 adsorption-desorption, X-ray diffraction, temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS). The TPR results showed that the reducibility of the RP Ni-Mo-Zn/Al2O3 catalyst was improved over the oxidic nickel catalyst. The XPS spectra confirmed the binding energy of the RPS nickel catalyst to be higher than that of the oxidic nickel catalyst. The catalytic performance was evaluated on a fixed-bed reactor (reaction temperature between 30 °C and 70°C, at 2.8 MPa of total pressure and weight hourly space velocity of 2.0 h−1, the volume of H2/pyrogasoline = 200: 1). The rising temperature of the RPS nickel catalyst was almost 20°C lower than that of the oxidic nickel catalyst during the initial stage of the hydrogenation reaction. The results indicated that the RPS nickel catalyst exhibited better stability than the oxidic nickel catalyst during the start-up period, thereby providing a better selectivity in long-term operation.

Keywords

nickel catalyst presulphided pyrolysis gasoline reduction and passivation selective hydrogenation 

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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2016

Authors and Affiliations

  • Zi-Xia Li
    • 1
    • 2
    • 3
  • Wei Sun
    • 1
  • Shun-Qin Liang
    • 3
  • Huan-Ling Song
    • 1
  1. 1.State Key laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical Physics, Chinese Academy of SciencesLanzhouChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.Lanzhou Petrochemical Research Center of PetrochinaHeshui North Road, No. 1LanzhouChina

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