Electrical catalytic dechlorination of pentachloropyridine in Zn/Ag bimetallic system

GONG Jinxing; XU Yinghua; MA Chun’an; MA Hao; ZHU Zhangen

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Electrical catalytic dechlorination of pentachloropyridine in Zn/Ag bimetallic system

更新时间：2025-12-10

- Electrical catalytic dechlorination of pentachloropyridine in Zn/Ag bimetallic system
- CIESC Journal Issue S1, Pages: 55-59(2008)
- 作者机构：
  
  浙江工业大学绿色化学合成技术国家重点实验室培育基地
- 作者简介：
- 基金信息：
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- Online First：30 June 2008，
  
  Published：30 June 2008
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GONG Jinxing, XU Yinghua, MA Chun’an, et al. Electrical catalytic dechlorination of pentachloropyridine in Zn/Ag bimetallic system[J]. CIESC Journal, 2008, (S1): 55-59.
DOI：

GONG Jinxing, XU Yinghua, MA Chun’an, et al. Electrical catalytic dechlorination of pentachloropyridine in Zn/Ag bimetallic system[J]. CIESC Journal, 2008, (S1): 55-59. DOI：

摘要

研究了Zn/Ag二元金属体系对五氯吡啶的催化还原脱氯性能。实验考察了初始pH值、催化剂的投加量、反应温度等参数对反应的影响，在此基础上探讨了其脱氯机理。实验结果表明：反应温度为60℃时，单一锌粉能够对五氯吡啶进行还原脱氯生成四氯吡啶，但是收率不高，只有20%左右，在银的催化作用下，四氯吡啶收率得到了很大提高。当反应初始pH控制在弱酸条件下（5左右），硝酸银浓度为10 g·L-1时，反应3h后四氯吡啶收率可达到60%以上。在Zn/Ag双金属表面，五氯吡啶的脱氯反应符合一级反应，速率常数为0.0097 min-1。

Abstract

Dechlorination of pentachloropyridine catalyzed by Zn/Ag bimetal particles was studied in this workThe effects of initial pH of the system

amount of catalyst and reaction temperature on the reaction were studiedThe results showed that the zinc powder could be used to reductively dechlorinate pentachloropyridine to tetrachloropyridine with its yield about 20%Under the catalytic effect of silver

the dechlorination efficiency of pentachloropyridine was greatly improvedWhen the initial pH was about 5

the concentration of silver nitrate was 10 g·L-1

the yield of tetrachloropyridine could be above 60%The reaction took place on the bimetal surface in a first order reaction

and the rate constant was 0.0097 min-1

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