Abstract: Biomass, as a carbon-containing renewable resource, can be converted into light aromatic hydrocarbons（BTXs） through catalytic pyrolysis. Nevertheless, the yield of BTXs produced from biomass is relatively low. Meanwhile, the high oxygen content and abundant mineral impurities in biomass make it essential to conduct in-depth research on this process, so as to improve the efficiency and economic benefits of BTXs production from biomass. This paper reviews biomass feedstocks, catalytic pyrolysis processes and corresponding mechanisms, and emphatically discusses the roles of hierarchical zeolites, metal oxides,and composite catalysts in increasing BTXs yield and upgrading bio-oil quality. Basic metal oxides can reduce the content of oxygenated compounds in bio-oil. Furthermore, composite catalysts constructed by basic metal oxides and zeolite catalysts can effectively enhance BTXs yield, showing favorable application prospects. The effects of biomass feedstocks and catalysts on the yield and selectivity of BTXs are summarized. Finally, the application prospects of hierarchical zeolite catalysts loaded with metal oxides in the field of biomass catalytic pyrolysis are prospected.

Key words: biomass, pyrolysis, catalyst, catalytic pyrolysis, lignocellulosic biomass, bio-oil