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Biomass Chemical Engineering ›› 2021, Vol. 55 ›› Issue (6): 39-48.doi: 10.3969/j.issn.1673-5854.2021.06.005

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Research Progress on Catalytic Pyrolysis of Biomass with Alkaline Earth Metal Oxide-based Catalysts

Yang LI, Kai LI, Zhenxi ZHANG, Shiyu FENG, Bin HU, Qiang LU()   

  1. National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
  • Received:2020-08-26 Online:2021-11-30 Published:2021-10-29
  • Contact: Qiang LU E-mail:qlu@ncepu.edu.cn


Fast pyrolysis is one of the most promising methods for the efficient conversion and utilization of biomass. However, the target product, known as bio-oil, is difficult to utilize directly due to its high oxygen content and complex components. Fast pyrolysis of biomass catalyzed by alkaline earth metal oxides is able to remove the oxygen of the pyrolysis products in the form of CO2 and H2O, thereby improving the bio-oil quality. This review summarized the reaction mechanism (ketonization, aldol condensation, ring opening and side-chain scission) involved in the catalytic pyrolysis of biomass with the typical alkaline earth metal oxides-based catalysts. Also, the effects of catalysts (CaO, MgO, alkaline earth metal-based zeolites and activated carbons), raw biomass, pyrolysis temperature, catalyst amount, residence time, catalytic fast pyrolysis method and catalyst deactivation on the yield and quality of bio-oil were discussed. Finally, the application of biomass catalytic pyrolysis for producing high-quality bio-oil was prospected, which was expected to provide a theoretical basis for the utilization of biomass resources.

Key words: biomass, catalytic pyrolysis, alkaline earth metal oxides, bio-oil

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