title: Biomass catalytic pyrolysis to produce olefins and aromatics with a physically mixed catalyst.
abstract: Zeolite catalysts with micropores present good catalytic characteristics in biomass catalytic pyrolysis process. However, large-molecule oxygenates produced from pyrolysis cannot enter their pores and would form coke on their surfaces, which decreases hydrocarbon yield and deactivates catalyst rapidly. This paper proposed adding some mesoporous and macroporous catalysts (Gamma-Al2O3, CaO and MCM-41) in the microporous catalyst (LOSA-1) for biomass catalytic pyrolysis. The added catalysts were used to crack the large-molecule oxygenates into small-molecule oxygenates, while LOSA-1 was used to convert these small-molecule oxygenates into olefins and aromatics. The results show that all the additives in LOSA-1 enhanced hydrocarbon yield obviously. The maximum aromatic+olefin yield of 25.3% obtained with 10% Gamma-Al2O3/90% LOSA-1, which was boosted by 39.8% compared to that obtained with pure LOSA-1. Besides, all the additives in LOSA-1 improved the selectivities of low-carbon components in olefins and aromatics significantly.
authors.affiliation: Ministry of Education of Key Laboratory of Energy Thermal Conversion and Control, School of Energy and Environment, Southeast University, Nanjing 210096, PR China.
authors.forename: Huiyan
authors.initials: H
authors.lastname: Zhang
authors.forename: Rui
authors.initials: R
authors.lastname: Xiao
authors.forename: Baosheng
authors.initials: B
authors.lastname: Jin
authors.forename: Guomin
authors.initials: G
authors.lastname: Xiao
authors.forename: Ran
authors.initials: R
authors.lastname: Chen
mesh_terms: D000475:Alkenes / Q000138:chemical synthesis*; D000537:Aluminum Oxide / Q000737:chemistry; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D017610:Calcium Compounds / Q000737:chemistry; D002244:Carbon / Q000032:analysis; D002384:Catalysis; D006358:Hot Temperature; D006841:Hydrocarbons, Aromatic / Q000138:chemical synthesis*; D012275:Oryza / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry; D014866:Waste Products
chemical_list: D000475:Alkenes; D017610:Calcium Compounds; D006841:Hydrocarbons, Aromatic; C509968:MCM-41; D010087:Oxides; D014866:Waste Products; D002244:Carbon; D012822:Silicon Dioxide; C016538:lime; D000537:Aluminum Oxide