title: Kinetic models comparison for steam gasification of coal/biomass blend chars.
abstract: The non-isothermal thermogravimetric method (TGA) was applied to different chars produced from lignite (LN), sawdust (SD) and their blends at the different mass ratios in order to investigate their thermal reactivity under steam atmosphere. Through TGA analysis, it was determined that the most prominent interaction between sawdust and lignite occurred at the mass ratio of sawdust/lignite as 1:4, but with further dose of more sawdust into its blends with lignite, the positive interaction deteriorated due to the agglomeration and deactivation of the alkali mineral involved in sawdust at high steam gasification temperature. Through systematic comparison, it could be observed that the random pore model was the most suitable among the three gas-solid reaction models adopted in this research. Finally, rational kinetic parameters were reached from these gas-solid reaction models, which provided a basis for design and operation of the realistic system of co-gasification of lignite and sawdust in this research.
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Chaofen
authors.initials: C
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China. Electronic address: husong_hust@hotmail.com.
authors.forename: Song
authors.initials: S
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Xiang
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China. Electronic address: yhping2002@163.com.
authors.forename: Haiping
authors.initials: H
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Lushi
authors.initials: L
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Su
authors.affiliation: College of Electric Power, North China University of Water Conservancy and Hydroelectric Power, Zheng Zhou 450011, China.
authors.forename: Baowen
authors.initials: B
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Qindong
authors.initials: Q
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Limo
authors.initials: L
authors.lastname: He
mesh_terms: D018533:Biomass; D002606:Charcoal / Q000737:chemistry*; D003031:Coal / Q000032:analysis*; D005740:Gases / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D013227:Steam; D013818:Thermogravimetry; D014934:Wood / Q000737:chemistry*
chemical_list: D003031:Coal; D005740:Gases; D013227:Steam; C540010:biochar; D002606:Charcoal
keywords: Biomass; Co-gasification; Coal; Gas–solid kinetic models