title: Effect of torrefaction on the properties of rice straw high temperature pyrolysis char: Pore structure, aromaticity and gasification activity.
abstract: The influence of torrefaction on the physicochemical characteristics of char during raw and water washed rice straw pyrolysis at 800-1200°C is investigated. Pore structure, aromaticity and gasification activity of pyrolysis chars are compared between raw and torrefied samples. For raw straw, BET specific surface area decreases with the increased torrefaction temperature at the same pyrolysis temperature and it approximately increases linearly with weight loss during pyrolysis. The different pore structure evolutions relate to the different volatile matters and pore structures between raw and torrefied straw. Torrefaction at higher temperature would bring about a lower graphitization degree of char during pyrolysis of raw straw. Pore structure and carbon crystalline structure evolutions of raw and torrefied water washed straw are different from these of raw straw during pyrolysis. For both raw and water washed straw, CO2gasification activities of pyrolysis chars are different between raw and torrefied samples.
authors.affiliation: Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P. O. Box 272, Shanghai 200237, PR China.
authors.forename: Handing
authors.initials: H
authors.lastname: Chen
authors.affiliation: Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P. O. Box 272, Shanghai 200237, PR China. Electronic address: cxl@ecust.edu.cn.
authors.forename: Xueli
authors.initials: X
authors.lastname: Chen
authors.affiliation: Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P. O. Box 272, Shanghai 200237, PR China.
authors.forename: Yueqiang
authors.initials: Y
authors.lastname: Qin
authors.affiliation: Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P. O. Box 272, Shanghai 200237, PR China.
authors.forename: Juntao
authors.initials: J
authors.lastname: Wei
authors.affiliation: Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P. O. Box 272, Shanghai 200237, PR China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D001709:Biotechnology / Q000379:methods*; D002245:Carbon Dioxide / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D006358:Hot Temperature; D009584:Nitrogen / Q000737:chemistry; D009812:Odorants; D012275:Oryza / Q000737:chemistry*; D016062:Porosity; D012995:Solubility; D014867:Water / Q000737:chemistry
chemical_list: D005740:Gases; C540010:biochar; D014867:Water; D002245:Carbon Dioxide; D002606:Charcoal; D009584:Nitrogen
keywords: Gasification activity; Graphitization; Pyrolysis; Surface area; Torrefaction