Experiment of polyvinyl chloride plastic dechlorination process under condition of minimum secondary reaction

LUO Jia; GUI Ben; WAN Wenjun; ZHANG Xi; WANG Wenxia; QIAO Yu

doi:10.3969/j.issn.0438-1157.2014.11.022

您当前的位置：

首页 >

文章列表页 >

Experiment of polyvinyl chloride plastic dechlorination process under condition of minimum secondary reaction

更新时间：2025-12-10

- Experiment of polyvinyl chloride plastic dechlorination process under condition of minimum secondary reaction
- CIESC Journal Issue 11, Pages: 4368-4375(2014)
- 作者机构：
  
  1. 广东电网公司电力科学研究院,广东,广州,510080
  2. 中南电力设计院,湖北,武汉,430074
  3. 华中科技大学煤燃烧国家重点实验室,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.11.022
  CLC： Q325.3
- Online First：05 November 2014，
  
  Published：05 November 2014
- 稿件说明：
移动端阅览
LUO Jia, GUI Ben, WAN Wenjun, et al. Experiment of polyvinyl chloride plastic dechlorination process under condition of minimum secondary reaction[J]. CIESC Journal, 2014, (11): 4368-4375.
DOI：

LUO Jia, GUI Ben, WAN Wenjun, et al. Experiment of polyvinyl chloride plastic dechlorination process under condition of minimum secondary reaction[J]. CIESC Journal, 2014, (11): 4368-4375. DOI： 10.3969/j.issn.0438-1157.2014.11.022.

摘要

采用金属网反应器对PVC热解过程中温度范围300～800℃、升温速率1～1000 K·s-1、停留时间0～120 s的热解气体释放特性开展了实验研究.并基于EPA-26A标准对热解气中HCl和Cl2进行了检测.结果显示

HCl和Cl2的产率均随着温度的升高、停留时间的增长而有所提高.降低升温速率能够提升气态产物总体产率但没有改变含氯气体的总体分布.热解实验中气态产物均以HCl为主

并伴随有少量的Cl2生成;该结果也证实了在PVC热解脱氯过程中大量含氯自由基的存在

进一步证实了PVC热解过程遵循的是自由基链反应机理.此外

通过对PVC热解焦样的分析进一步发现PVC热解第一阶段链反应终止时的分子更接近于直链多烯烃结构而非聚合环状结构

环化反应在该阶段并未发生.

Abstract

Pyrolysis experiments of polyvinylchloride (PVC) were performed using a wire-mesh reactor. Non-condensing gases were collected at a heating rate 1—1000 K·s-1 with temperatures from 300℃ to 800℃ and a holding time from 0 to 120 s. EPA-method 26A was employed to determinate the concentrations of both Cl2 and HCl. The results showed that the release of HCl and Cl2 increased continually with increase of temperature and reaction time. Lower heating rate could make the total gas yield increase but do not change the chlorine distribution. Cl2 seemed as an accompanied product during HCl release

which indicated that a bunch of free Cl radicals were involved in PVC thermal degradation. The results confirmed that the pyrolysis process of PVC plastic followed the free radical chain mechanism. Lastly

it was further indicated

by the analysis of PVC pyrolysis tar

that the products obtained at the first stage of PVC pyrolysis were straight-chain polyenes rather than ring structure compounds

i.e. occurring of cyclization reactions seemed impossible at the phase.

关键词

Keywords

references

Views

250

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Research on the process path of sodium-based dry desulfurization ash combined with fly ash decalcification

Design and anti-fouling performance research of underwater superoleophobic coating with strong substrate adhesion

Study on synergistic catalysis by highly dispersed dual-site Co species for CO2-oxidative dehydrogenation of ethane to ethylene

Research progress on cationic modification of plant fibers based on DES solvent systems

Synthesis and application of lignin-based flocculants

Related Author

QIN Yu

CAI Wentao

AN Jiancheng

LIAN Weikang

DU Mengwei

WANG Yali

LI Jieran

XU Xiubin

Related Institution

State Key Laboratory of Materials Low-Carbon Recycling, Beijing Building Materials Academy of Sciences Research Corporation

Beijing Tongda Refractory Technologies Corporation

Yangquan Jinyu Tongda High-Temperature Materials Corporation

School of Chemistry and Chemical Engineering, Guangzhou University

School of Environment and Energy, South China University of Technology

⁰