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题名: The study on the dechlorination of OCDD with Pd/C catalyst in ethanol-water solution under mild conditions
作者: Zhang, Feng;  Chen, Jiping;  Zhang, Haijun;  Ni, Yuwen;  Liang, Xinmiao
通讯作者: 陈吉平
关键词: hydrodechlorination ;  Pd/C catalyst ;  dechlorination pathway ;  OCDD
刊名: CHEMOSPHERE
发表日期: 2007-08-01
DOI: 10.1016/j.chemosphere.2007.03.056
卷: 68, 期:9, 页:1716-1722
收录类别: SCI
文章类型: Article
部门归属: 1,18
项目归属: 103,1803
产权排名: 1;1
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Dechlorination of octachlorodibenzo-p-dioxin (OCDD) was carried out in ethanol-water (v/v = 1:1) solution of NaOH in the presence of Pd/C catalysts with the use of H-2. The substrate was dechlorinated with Pd/C under mild conditions (atmospheric pressure and < 100 degrees C to give a chlorine-free product, dibenzo-p-dioxin (DD), in high yields. After reaction of 3 h at 50 degrees C, 95.9% OCDD was degraded to low dechlorinated congeners and the yield of DD was 77.4%. We have also studied the dechlorination selectivity of chlorine atoms on the different substituted positions and postulated the dechlorination pathway of OCDD. For OCDD, the 2-position has higher reactivity than 1-position, but the difference is very small. From the distribution statistics of the intermediates during the reaction, we postulate that the steric effect plays an important role during the reaction and affect the dechlorination pathway of OCDD. (c) 2007 Elsevier Ltd. All rights reserved.
关键词[WOS]: DIBENZO-P-DIOXINS ;  SUPPORTED PALLADIUM CATALYSTS ;  COPLANAR PCBS ;  FLY-ASH ;  DEGRADATION ;  DECOMPOSITION ;  CALCIUM ;  PCDFS ;  PCDDS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000248134200015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98979
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, Peoples R China

Recommended Citation:
Zhang, Feng,Chen, Jiping,Zhang, Haijun,et al. The study on the dechlorination of OCDD with Pd/C catalyst in ethanol-water solution under mild conditions[J]. CHEMOSPHERE,2007,68(9):1716-1722.
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