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Catalytic destruction of chlorinated aromatic pollutants over mesoporous CuxMg1-xAl2O4 spinel oxides
Fan, Yun; Lu, Xianbo; Ni, Yuwen; Zhang, Haijun; Zhu, Meiwen; Li, Yun; Chen, Jiping
关键词Spinel Hexachlorobenzene Polychlorinated Dibenzodioxin And Dibenzofuran Hydrodechlorination Catalytic Formation
刊名APPLIED CATALYSIS B-ENVIRONMENTAL
2011-01-14
DOI10.1016/j.apcatb.2010.11.001
101期:3-4页:606-612
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]FLY-ASH ; METAL-OXIDES ; PCDF FORMATION ; DECHLORINATION ; DECOMPOSITION ; HEXACHLOROBENZENE ; DEGRADATION ; TEMPERATURE ; 1,2-DICHLOROBENZENE ; DIBENZOFURANS
英文摘要Destruction of chlorinated aromatic compounds was carried out over mesoporous CuxMg1-xAl2O4 spinel oxides with x=0, 0.2, 0.5 and 0.8, which were prepared by the coprecipitation method. All the catalyst samples were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and nitrogen adsorption-desorption isotherms. The performances of these catalysts on the decomposition of hexachlorobenzene (HCB) and the catalytic formation of polychlorinated dibenzodioxin and dibenzofuran (PCDD/F) were evaluated in a closed system. The activities of these catalysts for dechlorination of HCB increased with increasing the magnesium content in them. The Cu0.2Mg0.8Al2O4 presented a higher catalytic activity for the hydrodechlorination of HCB than CuO. Al2O3, as well as the other CuxMg1-xAl2O4 spinels. More than 99% dechlorination efficiency of HCB was achieved at low temperatures (<= 300 degrees C) for a short time (30 min) under air atmosphere over Cu0.2Mg0.8Al2O4 spinet. In comparison to air atmosphere, nitrogen atmosphere seemed to be more beneficial for the dechlorination of HCB with a dechlorination efficiency of 90% at 250 degrees C for 10 min. For the Cu0.2Mg0.8Al2O4 catalyst, the I-TEQ of PCDD/F formed was 4.5 pg/g, far below the value of 15122.5 pg/g on CuO. The Cu0.2Mg0.8Al2O4 catalyst inhibited the chlorination reaction and enhanced the dechlorination reaction. The catalytic behavior including catalytic dechlorination of HCB and catalytic formation of PCDD/F related to the physical characteristics of CuxMg1-xAl2O4 spinel was discussed. Crown Copyright (c) 2010 Published by Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000287068400051
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142349
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
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Fan, Yun,Lu, Xianbo,Ni, Yuwen,et al. Catalytic destruction of chlorinated aromatic pollutants over mesoporous CuxMg1-xAl2O4 spinel oxides[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2011,101(3-4):606-612.
APA Fan, Yun.,Lu, Xianbo.,Ni, Yuwen.,Zhang, Haijun.,Zhu, Meiwen.,...&Chen, Jiping.(2011).Catalytic destruction of chlorinated aromatic pollutants over mesoporous CuxMg1-xAl2O4 spinel oxides.APPLIED CATALYSIS B-ENVIRONMENTAL,101(3-4),606-612.
MLA Fan, Yun,et al."Catalytic destruction of chlorinated aromatic pollutants over mesoporous CuxMg1-xAl2O4 spinel oxides".APPLIED CATALYSIS B-ENVIRONMENTAL 101.3-4(2011):606-612.
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