title: Multifaceted effects of HZSM-5 (Proton-exchanged Zeolite Socony Mobil-5) on catalytic cracking of pinewood pyrolysis vapor in a two-stage fixed bed reactor.
abstract: The pinewood was pyrolyzed in the first reactor at a heating rate of 10°Cmin(-1) from room temperature to 700°C, and the vapor was allowed to be cracked through the second reactor in a temperature range of 450-750°C without and with HZSM-5. Attempts were made to determine a wide spectrum of gaseous and liquid products, as well as the mass and element partitions to gas, water, bio-oil, coke and char. HZSM-5 showed a preferential deoxygenation effect via the facilitated decarbonylation and decarboxylation with the inhibited dehydration at 550-600°C. This catalyst also displayed a high selectivity for the formations of aromatic hydrocarbons and olefins by the promoted hydrogen transfer to these products at 550-600°C. The bio-oil produced with HZSM-5 at 500-600°C had the yields of 14.5-16.8%, the high heat values of 39.1-42.4MJkg(-1), and the energy recoveries of 33-35% (all dry biomass basis).
authors.affiliation: Department of Chemical Engineering for Energy, East China University of Science and Technology, 130# Meilong Road, Shanghai 200237, PR China.
authors.forename: Yimeng
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Chemical Engineering for Energy, East China University of Science and Technology, 130# Meilong Road, Shanghai 200237, PR China. Electronic address: jwang2006@ecust.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Wang
mesh_terms: D000475:Alkenes / Q000737:chemistry; D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D002245:Carbon Dioxide / Q000737:chemistry; D002248:Carbon Monoxide / Q000737:chemistry; D002384:Catalysis; D005740:Gases / Q000737:chemistry*; D006361:Heating; D006841:Hydrocarbons, Aromatic / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry; D008697:Methane / Q000737:chemistry; D028223:Pinus / Q000737:chemistry; D011522:Protons; D014867:Water / Q000737:chemistry; D014934:Wood / Q000737:chemistry*; D017641:Zeolites
chemical_list: D000475:Alkenes; D056804:Biofuels; D005740:Gases; D006841:Hydrocarbons, Aromatic; D011522:Protons; D014867:Water; D017641:Zeolites; D002245:Carbon Dioxide; D002248:Carbon Monoxide; D006859:Hydrogen; D008697:Methane
keywords: Bio-oil; Catalytic upgrading; HZSM-5; Pinewood; Pyrolysis