title: Removing and recovering gas-phase elemental mercury by Cu(x)Co(3-x)O(4) (0.75< or = x < or =2.25) in the presence of sulphur compounds.
abstract: The Hg(0) oxidation ability and reusability of Cu(x)Co(3-x)O(4) were investigated in an attempt to improve SO(2) anti-poisoning ability of metal oxide and produce more economic and effective sorbents for the control of Hg(0) emission from combustion processes. The influence of copper content on Cu(x)Co(3-x)O(4)'s (0.75< or = x < or =2.25) oxidation ability of Hg(0) in the presence of SO(2) was investigated. According to the X-ray diffraction, Brunauer-Emmett-Teller (BET) and mass balance analysis on mercury, we found that Cu(1.5)Co(1.5)O(4) showed the highest S(BET) and best Hg(0) oxidation ability. With continuous increase of x from 0.75 to 2.25, Cu(x)Co(3-x)O(4)'s SO(2) anti-poisoning ability increased. The analysis results of the X-ray photoelectron spectroscopy manifested that the adsorptive mercury species on spent Cu(1.5)Co(1.5)O(4) was HgO. The spent Cu(1.5)Co(1.5)O(4) could be regenerated by thermal decomposition at 673K and regenerated Cu(1.5)Co(1.5)O(4) showed higher Hg(0) oxidation ability due to Hg-doping. Regenerated enrichment Hg(0) was collected using activated carbon at an ambient temperature to eliminate the secondary pollution.
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China.
authors.forename: Zhijian
authors.initials: Z
authors.lastname: Mei
authors.forename: Zhemin
authors.initials: Z
authors.lastname: Shen
authors.forename: Qingjie
authors.initials: Q
authors.lastname: Zhao
authors.forename: Tao
authors.initials: T
authors.lastname: Yuan
authors.forename: Yejian
authors.initials: Y
authors.lastname: Zhang
authors.forename: Fei
authors.initials: F
authors.lastname: Xiang
authors.forename: Wenhua
authors.initials: W
authors.lastname: Wang
mesh_terms: D000397:Air Pollution / Q000517:prevention & control; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D005740:Gases / Q000737:chemistry; D008628:Mercury / Q000737:chemistry / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D013457:Sulfur Compounds / Q000737:chemistry*
chemical_list: D005740:Gases; D013457:Sulfur Compounds; D003035:Cobalt; D003300:Copper; D008628:Mercury