聚氯乙烯与聚苯乙烯共热解协同作用研究

王安艺, 秦林波, 梁鑫海, 方纪元

PDF(2002 KB)
PDF(2002 KB)
塑料科技 ›› 2025, Vol. 53 ›› Issue (03) : 1-6. DOI: 10.15925/j.cnki.issn1005-3360.2025.03.001
理论与研究

聚氯乙烯与聚苯乙烯共热解协同作用研究

作者信息 +

Study on Synergistic Co-pyrolysis of Polyvinyl Chloride and Polystyrene

Author information +
History +

摘要

为了研究生活垃圾中废弃塑料热解过程中的协同作用,利用TG-FTIR-MS耦合分析方法,系统研究聚氯乙烯(PVC)、聚苯乙烯(PS)及其共热解过程中的热失重行为、官能团变化和气相产物特征。在此基础上,分析PVC单组分与PVC/PS混合热解特性的差异及其产生差异的原因。结果表明:单独PVC热解的主要气相产物是氯化氢(HCl)和少量氯代烃。PS热解过程主要是苯乙烯单体解聚和少量无规则断链反应。PVC与PS共热解有较强的协同作用,热解主要分为两个阶段。第一阶段(235~326 ℃)主要生成HCl和氯代烃,第二阶段(326~516 ℃)主要产物为烷烃、烯烃及少量芳香族化合物,因此可以选择在235~326 ℃温度范围内进行脱氯处理。相比PVC单独热解,PVC与PS共热解时氯的释放受到抑制,HCl的产量减少,固体产物中的氯含量增加。研究结果可为生活垃圾热解技术的发展提供一定的支持。

Abstract

To investigate the synergistic effects during the pyrolysis process of waste plastics in municipal solid waste, a TG-FTIR-MS coupling analysis method was utilized to systematically study the thermogravimetric behavior, functional group changes, and gaseous product characteristics during the pyrolysis of polyvinyl chloride (PVC), polystyrene (PS), and their co-pyrolysis. On this basis, the differences in pyrolysis characteristics between pure PVC and PVC/PS mixtures were analyzed, along with the reasons for these differences. The results showed that the main gaseous products of PVC pyrolysis were hydrogen chloride (HCl) and small amounts of chlorinated hydrocarbons. In the PS pyrolysis process, the main reactions were depolymerization into styrene monomers and a small amount of random chain scission. There was a strong synergistic effect during the co-pyrolysis of PVC and PS, which could be divided into two stages. In the first stage (235~326 ℃), the primary products were HCl and chlorinated hydrocarbons, while in the second stage (326~516 ℃), the main products were alkanes, olefins, and small amounts of aromatic compounds. Therefore, dechlorination treatment could be carried out within the temperature range of 235~326 ℃. Compared with the pyrolysis of pure PVC, chlorine release was inhibited during the co-pyrolysis of PVC and PS, resulting in reduced HCl production and increased chlorine content in the solid products. The findings can provide support for the development of municipal solid waste pyrolysis technology.

关键词

生活垃圾 / 聚氯乙烯 / 聚苯乙烯 / 共热解

Key words

Municipal solid waste / Polyvinyl chloride / Polystyrene / Co-pyrolysis

中图分类号

X705

引用本文

导出引用
王安艺 , 秦林波 , 梁鑫海 , . 聚氯乙烯与聚苯乙烯共热解协同作用研究. 塑料科技. 2025, 53(03): 1-6 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.03.001
WANG Anyi, QIN Linbo, LIANG Xinhai, et al. Study on Synergistic Co-pyrolysis of Polyvinyl Chloride and Polystyrene[J]. Plastics Science and Technology. 2025, 53(03): 1-6 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.03.001

参考文献

1
国家统计局.中华人民共和国2022年国民经济和社会发展统计公报[J].中国统计,2023(3):12-29.
2
SHEN M, HU T, HUANG W, et al. Can incineration completely eliminate plastic wastes? An investigation of microplastics and heavy metals in the bottom ash and fly ash from an incineration plant[J]. Science of The Total Environment, 2021, 779: 146528.
3
丁兆勇.基于“双碳”的生活垃圾焚烧厂开展节能降耗必要性分析[J].节能,2024,43(4):126-128.
4
杨子豪,陈宪科,甘志端,等.聚氯乙烯及其混合塑料热解脱氯技术研究进展[J].塑料科技,2024,52(12):146-153.
5
GAO P P, HU Z C, SHENG Y, et al. Migration characteristics of chlorine during pyrolysis of municipal solid waste pellets[J]. Waste Management, 2023, 172: 208-215.
6
段劲松,孙豪君,刘进,等.某特大类垃圾焚烧发电厂整体施工技术[J].施工技术:中英文,2023,52(20):42-48.
7
BRADEN J, BAI X L. Production of biofuel precursor chemicals from the mixture of cellulose and polyvinylchloride in polar aprotic solvent[J]. Waste Management, 2018, 78: 894-902.
8
TANG Y J, HUANG Q X, SUN K, et al. Co-pyrolysis characteristics and kinetic analysis of organic food waste and plastic[J]. Bioresource Technology, 2018, 249: 16-23.
9
任浩华,王帅,王芳杰,等.PVC热解过程中HCl的生成及其影响因素[J].中国环境科学,2015,35(8):2460-2469.
10
贺兴处,陈德珍.典型聚乙烯、聚丙烯、聚苯乙烯废塑料共热解初期反应特性的ReaxFF分子模拟研究[J].燃料化学学报,2022,50(3):346-356.
11
ONWUDILI J A, INSURA N, WILLIAMS P T. Composition of products from the pyrolysis of polyethylene and polystyrene in a closed batch reactor: Effects of temperature and residence time[J]. Journal of Analytical and Applied Pyrolysis, 2009, 86(2): 293-303.
12
QIN L B, HAN J, ZHAO B, et al. Thermal degradation of medical plastic waste by in-situ FTIR, TG-MS and TG-GC/MS coupled analyses[J]. Journal of Analytical and Applied Pyrolysis, 2018, 136: 132-45.
13
JORDAN K J, SUIB S L, KOBERSTEIN J T. Determination of the degradation mechanism from the kinetic parameters of dehydrochlorinated poly(vinyl chloride) decomposition[J]. The Journal of Physical Chemistry B, 2001, 105(16): 3174-3181.
14
夏士清,周达飞.紫外-可见光法分析增塑剂(DOP)对PVC热降解的稳定作用[J].聚氯乙烯,1994(5):59-63.
15
DENG J, YU K L, WANG C P, et al. Pyrolysis mechanism of different thermal aging of PVC insulation copper cable for home decoration[J]. Thermochimica Acta, 2023, 729: 179611.
16
张敏华,李春华,姜浩锡.热重质谱法研究聚苯乙烯热降解机理[J].化工进展,2008,27(4):609-612.
17
WANG K C, BAN Y P, WU Y F, et al. Synergistic effect and chlorine migration behavior in co-pyrolysis of Pingshuo coal and polyvinyl chloride and directional chlorine enrichment using calcium oxide[J]. Fuel, 2023, 349: 128749.
18
庄虔晓.PP、PVC和PS单组分及混合物热解特性及动力学研究[D].青岛:青岛科技大学,2021.
19
MCNEILL I C, NEIL D, GUYOT A, et al. Thermal degradation of graft copolymers of PVC prepared by mastication with styrene and methyl methacrylate, and of further PVC mixtures and vinyl chloride copolymers[J]. European Polymer Journal, 1971, 7(5): 453-469.

基金

湖北省自然科学基金创新群体项目(2023AFA004)
湖北省重点研发计划项目(2023BCB106)
湖北省重点研发计划项目(2022BCA085)

评论

PDF(2002 KB)

Accesses

Citation

Detail

段落导航
相关文章

/