title: Pressurized pyrolysis of rice husk in an inert gas sweeping fixed-bed reactor with a focus on bio-oil deoxygenation.
abstract: The pyrolysis of rice husk was conducted in a fixed-bed reactor with a sweeping nitrogen gas to investigate the effects of pressure on the pyrolytic behaviors. The release rates of main gases during the pyrolysis, the distributions of four products (char, bio-oil, water and gas), the elemental compositions of char, bio-oil and gas, and the typical compounds in bio-oil were determined. It was found that the elevation of pressure from 0.1MPa to 5.0MPa facilitated the dehydration and decarboxylation of bio-oil, and the bio-oils obtained under the elevated pressures had significantly less oxygen and higher calorific value than those obtained under atmospheric pressure. The former bio-oils embraced more acetic acid, phenols and guaiacols. The elevation of pressure increased the formation of CH4 partially via the gas-phase reactions. An attempt is made in this study to clarify "the pure pressure effect" and "the combined effect with residence time".
authors.affiliation: Department of Chemical Engineering for Energy, Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, 130#, Meilong Road, Shanghai 200237, PR China.
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Qian
authors.affiliation: Department of Chemical Engineering for Energy, Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, 130#, Meilong Road, Shanghai 200237, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Chemical Engineering for Energy, Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, 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: D001274:Atmospheric Pressure; D056804:Biofuels / Q000032:analysis*; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002606:Charcoal / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D006358:Hot Temperature; D005741:Noble Gases / Q000737:chemistry*; D009821:Oils / Q000737:chemistry; D012275:Oryza / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D011312:Pressure; D014866:Waste Products
chemical_list: D056804:Biofuels; D005741:Noble Gases; D009821:Oils; D014866:Waste Products; C540010:biochar; D002606:Charcoal; D010100:Oxygen
keywords: Bio-oil; Deoxygenation; Pressure; Pyrolysis; Rice husk