生物质双级催化热解制备燃料化学品的研究进展

The target product bio-oil from biomass pyrolysis is difficult to be directly applied due to its high oxygen content and complex components. Deoxidization and upgrading of bio-oil can be realized by upgrading pyrolysis steam with suitable catalyst. Based on the previous studies, this paper firstly summarized the structural characteristics, catalytic principle and catalytic effect of metal oxides as well as zeolite catalysts in catalytic pyrolysis of biomass. Then, the construction principle and catalytic mode of micro-mesoporous composite together with metal oxide/ZSM-5 composite dual catalytic system were introduced in detail, as well as their influence on the product distribution of biomass catalytic pyrolysis, and the feasibility and practicability of dual catalytic system were also illustrated. At the same time, other factors including raw material characteristics, process parameters and operation working mode which affected biomass catalytic pyrolysis were summarized. Finally, in view of the existing problems in research and development of dual catalytic pyrolysis, the prospect of the comparative study of different dual catalytic modes, improvement of dual catalytic system to reduce production costs, and exploration of the multiple use values of dual catalyst were put forward.