title: Suppression of chlorinated aromatics by nitrogen and sulphur inhibitors in iron ore sintering.
abstract: Dioxins generated by iron and steel industry account for the majority of industrial dioxins emissions. This study compares the performance of different additives (including calcium sulphate dehydrate CaSO4·2H2O; calcium polysulphide CaSx; ammonium sulphate (NH4)2SO4; 4-methylthiosemicarbazide H3C-SC(NH)2NH2 and thiourea H2NCSNH2) as suppressant of chlorinated aromatics in iron ore sintering. The formation of chlorobenzenes (CBz) and polychlorinated biphenyls (PCBs), used as surrogates for dioxins, was suppressed significantly in the present of various inhibitors (1 wt%) except for CaSO4·2H2O. Moreover, a larger molar ratio of (S + N)/Cl leads to a higher suppression efficiency, so that the inhibition capacity of (NH4)2SO4 on both CBz and PCBs was weaker than H2NCSNH2. The generation of dioxin-like PCBs (Co- or dl-PCB) was also analysed.
authors.affiliation: Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing 100191, China.
authors.forename: Yadi
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Zhejiang 310007, China.
authors.forename: Alfons
authors.initials: A
authors.lastname: Buekens
authors.affiliation: School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
authors.forename: Lina
authors.initials: L
authors.lastname: Liu
authors.affiliation: Central Research Institute of Building and Construction, MCC Group, Co., Ltd, Beijing 100088, China.
authors.forename: Yibo
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing 100191, China.
authors.forename: Xiaolan
authors.initials: X
authors.lastname: Zeng
authors.affiliation: Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing 100191, China. Electronic address: sunif@buaa.edu.cn.
authors.forename: Yifei
authors.initials: Y
authors.lastname: Sun
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000517:prevention & control*; D001572:Benzofurans / Q000032:analysis; D002722:Chlorobenzenes; D004147:Dioxins / Q000032:analysis; D007501:Iron / Q000737:chemistry*; D008669:Metallurgy; D009584:Nitrogen / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000032:analysis; D000072317:Polychlorinated Dibenzodioxins; D013455:Sulfur / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D001572:Benzofurans; D002722:Chlorobenzenes; D004147:Dioxins; D000072317:Polychlorinated Dibenzodioxins; D013455:Sulfur; D011078:Polychlorinated Biphenyls; D007501:Iron; D009584:Nitrogen
keywords: Chlorinated aromatic compound; Fly ash; Inhibitor; Iron ore sintering