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Biomass Chemical Engineering ›› 2019, Vol. 53 ›› Issue (1): 8-16.doi: 10.3969/j.issn.1673-5854.2019.01.002

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Pd-β/MCM-41 Composite Molecular Sieve in Hydrocracking Waste Cooking Oil Reaction

Qian ZHAO1,2,Yuanzhen WEN1,3,Haibo JIN1,2,Guangxiang HE1,2,*()   

  1. 1. College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
    2. Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, Beijing 102617, China
    3. College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
  • Received:2017-11-29 Online:2019-01-30 Published:2019-03-15
  • Contact: Guangxiang HE E-mail:hgx@bipt.edu.cn
  • Supported by:
    国家自然科学基金资助项目(91634101);北京市属高校高水平教师队伍建设支持计划高水平创新团队建设计划项目(IDHT20180508)

Abstract:

β/MCM-41 meso-microporous composite molecular sieves were synthesized with β zeolite as silica-alumina source and CTAB as template. And then Pd-β/MCM-41 catalyst was prepared. The catalyst was characterized by XRD, N2 adsorption-desorption, NH3-TPD and XRF. And the catalytic hydrocracking activity of Pd-β/MCM-41 was separately investigated and compared with that of Pd catalysts which were prepared with γ-Al2O3, USY and ZSM-5 as carriers. The study showed that β/MCM-41 composite molecular sieves had both the structures of β zeolite and MCM-41 molecular sieve. Pd-β/MCM-41 catalyst had suitable medium-strong acidity center and suitable pore distribution structure and it had the highest activity of the hydrocracking. Meanwhile, the influence of the catalyst synthesis conditions on the catalyst activity was discussed. The results showed that the best hydrocracking activity on the vegetable oil was acquired as preparation 2% Pd on β/MCM-41 composite molecular sieves by ion exchange and the calcination temperature of 500 ℃. The conversion rate of raw oil reached 85.9%, and the yield of biogasoline could reach 16.4%, and the yield of biodiesel reached 17.8%. The composite molecular sieve catalyst had better thermal stability, regeneration property and prospect for industrial application.

Key words: β/MCM-41 meso-microporous composite molecular sieve catalyst, Pd, waste cooking oil, hydrocracking

CLC Number: