Effect of Zn, Cd compounds on formation of dioxins in model fly ash

LIAO Junhong; YANG Jie; MENG Weijie; LI Xiaodong; CHEN Tong

doi:10.11949/j.issn.0438-1157.20150034

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Effect of Zn, Cd compounds on formation of dioxins in model fly ash

更新时间：2025-11-26

- Effect of Zn, Cd compounds on formation of dioxins in model fly ash
- CIESC Journal Vol. 66, Issue 7, Pages: 2643-2648(2015)
- 作者机构：
  
  浙江大学能源清洁利用国家重点实验室,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150034
  CLC： K229
- Online First：05 July 2015，
  
  Published：05 July 2015
- 稿件说明：
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LIAO Junhong, YANG Jie, MENG Weijie, et al. Effect of Zn, Cd compounds on formation of dioxins in model fly ash[J]. CIESC Journal, 2015, 66(7): 2643-2648.
DOI：

LIAO Junhong, YANG Jie, MENG Weijie, et al. Effect of Zn, Cd compounds on formation of dioxins in model fly ash[J]. CIESC Journal, 2015, 66(7): 2643-2648. DOI： 10.11949/j.issn.0438-1157.20150034.

摘要

催化剂是二噁英(PCDD/Fs)从头合成的关键因素

但已有研究仍不足。在实验室条件下利用模拟飞灰(MFA)研究不同金属催化剂对PCDD/Fs生成量及分布的影响。结果表明

ZnO抑制PCDD/Fs的生成

ZnCl2对PCDD/Fs生成催化作用远大于CdCl2

生成PCDD/Fs浓度分别为431.78、6.32 ng·g-1。ZnCl2催化下生成PCDD/Fs浓度是ZnO的338倍

CdCl2催化下生成PCDD/Fs浓度是CdO的3倍。Zn、Cd化合物催化下生成PCDD/Fs氯化程度低。利用主成分分析(PCA)研究催化剂对PCDD/Fs分布的影响

结果表明不同金属催化剂作用下

17种有毒PCDD/Fs分布变化显著。同时ZnCl2催化下

反应气氛中氧含量的提高导致PCDD/Fs生成量增加

但是对PCDD/Fs分布的影响有限。

Abstract

Catalyst is the key factor for formation of dioxins i.e. PCDD/Fs

for which there is not enough study currently. In this paper

the effect of different metal catalyst contained in model fly ash (MFA) on both PCDD/Fs concentration and distribution is studied under laboratory conditions. The results show that ZnO can inhibit the formation of PCDD/Fs. The catalytic effect of ZnCl2 on PCDD/Fs is far more obvious than that of CdCl2 and the concentrations of PCDD/Fs obtained are 341.78 and 16.32 ng·g-1

respectively. PCDD/Fs formed by ZnCl2 promotion is 338 times as many as that of ZnO

while the concentration of PCDD/Fs catalyzed by CdCl2 is twice more than that of CdO. Principal component analysis (PCA) is used to research the effect of catalyst on PCDD/Fs distribution. It is observed that the change of distribution for 17 toxic PCDD/Fs catalyzed by different metal catalyst is significant. Meanwhile

the PCDD/Fs concentration rises with increase of O2 content

but for PCDD/Fs distribution it has only limit influence.

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