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题名: Catalytic destruction of chlorinated aromatic pollutants over mesoporous CuxMg1-xAl2O4 spinel oxides
作者: Fan, Yun1;  Lu, Xianbo1;  Ni, Yuwen1;  Zhang, Haijun1;  Zhu, Meiwen1;  Li, Yun1;  Chen, Jiping1
关键词: Spinel ;  Hexachlorobenzene ;  Polychlorinated dibenzodioxin and dibenzofuran ;  Hydrodechlorination ;  Catalytic formation
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2011-01-14
DOI: 10.1016/j.apcatb.2010.11.001
卷: 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
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.
关键词[WOS]: FLY-ASH ;  METAL-OXIDES ;  PCDF FORMATION ;  DECHLORINATION ;  DECOMPOSITION ;  HEXACHLOROBENZENE ;  DEGRADATION ;  TEMPERATURE ;  1,2-DICHLOROBENZENE ;  DIBENZOFURANS
语种: 英语
WOS记录号: WOS:000287068400051
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142349
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
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.
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