title: Mercury Adsorption and Oxidation over Cobalt Oxide Loaded Magnetospheres Catalyst from Fly Ash in Oxyfuel Combustion Flue Gas.
abstract: Cobalt oxide loaded magnetospheres catalyst from fly ash (Co-MF catalyst) showed good mercury removal capacity and recyclability under air combustion flue gas in our previous study. In this work, the Hg(0) removal behaviors as well as the involved reactions mechanism were investigated in oxyfuel combustion conditions. Further, the recyclability of Co-MF catalyst in oxyfuel combustion atmosphere was also evaluated. The results showed that the Hg(0) removal efficiency in oxyfuel combustion conditions was relative high compared to that in air combustion conditions. The presence of enriched CO2 (70%) in oxyfuel combustion atmosphere assisted the mercury oxidation due to the oxidation of function group of C-O formed from CO2. Under both atmospheres, the mercury removal efficiency decreased with the addition of SO2, NO, and H2O. However, the enriched CO2 in oxyfuel combustion atmosphere could somewhat weaken the inhibition of SO2, NO, and H2O. The multiple capture-regeneration cycles demonstrated that the Co-MF catalyst also present good regeneration performance in oxyfuel combustion atmosphere.
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Yongchun
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Chang
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Junying
authors.initials: J
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Chuguang
authors.initials: C
authors.lastname: Zheng
mesh_terms: D000327:Adsorption; D002384:Catalysis; D060729:Coal Ash / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D005742:Gasoline / Q000032:analysis*; D060328:Magnetic Phenomena; D008628:Mercury / Q000032:analysis*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*
chemical_list: D060729:Coal Ash; D005740:Gases; D005742:Gasoline; D010087:Oxides; D003035:Cobalt; D008628:Mercury; C060728:cobalt oxide