title: Combustion characteristics and arsenic retention during co-combustion of agricultural biomass and bituminous coal.
abstract: A combination of thermogravimetric analysis (TG) and laboratory-scale circulated fluidized bed combustion experiment was conducted to investigate the thermochemical, kinetic and arsenic retention behavior during co-combustion bituminous coal with typical agricultural biomass. Results shown that ignition performance and thermal reactivity of coal could be enhanced by adding biomass in suitable proportion. Arsenic was enriched in fly ash and associated with fine particles during combustion of coal/biomass blends. The emission of arsenic decreased with increasing proportion of biomass in blends. The retention of arsenic may be attributed to the interaction between arsenic and fly ash components. The positive correlation between calcium content and arsenic concentration in ash suggesting that the arsenic-calcium interaction may be regarded as the primary mechanism for arsenic retention.
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi 710075, China.
authors.forename: Chuncai
authors.initials: C
authors.lastname: Zhou
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi 710075, China. Electronic address: lgj@ustc.edu.cn.
authors.forename: Guijian
authors.initials: G
authors.lastname: Liu
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Xudong
authors.initials: X
authors.lastname: Wang
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Cuicui
authors.initials: C
authors.lastname: Qi
authors.affiliation: Department of Chemistry and Chemical Engineering, Huainan Normal University, Huainan 232001, China.
authors.forename: Yunhu
authors.initials: Y
authors.lastname: Hu
mesh_terms: D001151:Arsenic / Q000737:chemistry*; D018533:Biomass; D003031:Coal / Q000032:analysis*; D060729:Coal Ash / Q000737:chemistry; D007700:Kinetics; D013818:Thermogravimetry
chemical_list: D003031:Coal; D060729:Coal Ash; D001151:Arsenic
keywords: Agricultural biomass; Arsenic retention; Bituminous coal; Co-combustion; Thermochemical