Research progress on co-pyrolysis characteristics of coal and waste plastics

doi:10.16085/j.issn.1000-6613.2020-1182

Abstract

Abstract:

Co-pyrolysis of coal and plastics can recover the hydrocarbon resources in waste plastics and realize the harmless treatment of waste plastics, so it is a promising way to recycle waste plastics. In this paper, the pyrolysis characteristics and product properties during co-pyrolysis of coal and plastics were summarized, and the mechanism of co-pyrolysis and the transformation of chlorine during co-pyrolysis were analyzed. Furthermore, the different mixing modes of coal and plastics and their influence on co-pyrolysis characteristics were introduced. The co-pyrolysis of coal and plastics has obvious effect on increasing oil and reducing water. Adding a certain amount of waste plastics in the process of coal pyrolysis can improve the quality of tar, and impact the structure and reactivity of pyrolysis semicoke. Therefore, co-pyrolysis of coal and plastics is a green and efficient method to manage waste plastics, which is of great significance to recover waste plastics, solve white pollution problem and improve the utilization efficiency of coal.

Key words: waste plastics, coal, co-pyrolysis, hydrocarbon resources, recovery

摘要：

煤与塑料共热解既能回收废塑料中的碳氢资源，又可以实现废塑料的资源无害化处理，是一种很有前景的废塑料资源化回收利用方式。本文概述了煤与塑料共热解的热解特性及其产物性质，分析了煤与塑料共热解的机理及共热解过程中氯的迁移规律，简要介绍了煤和塑料的不同混合方式及其对共热解特性的影响。文中指出煤与塑料共热解具有明显的增油减水效应，在煤热解过程中添加一定量的废塑料不仅可以改善焦油品质，同时对热解半焦的结构和反应性也有一定的影响，因此煤-塑料共热解是一种绿色高效资源化的废塑料处理方式，对于废塑料循环利用、解决白色污染问题及提高煤炭利用率具有重要意义。

关键词: 废塑料, 煤, 共热解, 碳氢资源, 回收利用

CLC Number:

TQ530.2

ZHANG Tingting, BAI Zongqing, HOU Ranran, FENG Zhihao, YE Donghong, GUO Zhenxing, KONG Lingxue, BAI Jin, LI Wen. Research progress on co-pyrolysis characteristics of coal and waste plastics[J]. Chemical Industry and Engineering Progress, 2021, 40(5): 2461-2470.

张婷婷, 白宗庆, 侯冉冉, 冯智皓, 叶东鸿, 郭振兴, 孔令学, 白进, 李文. 煤与废塑料共热解特性研究进展[J]. 化工进展, 2021, 40(5): 2461-2470.

Figures/Tables 5

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类别	工业分析(空气干燥基，质量分数)/%			元素分析（干燥无灰基）/%
类别	FC	V	A	C	H	O	N	S
PE	0.00	99.94	0.06	88.66	13.26	0.00	0.06	0.02
PP	0.00	99.18	0.82	83.75	13.98	2.27	0.00	0.00
PS	0.33	99.48	0.19	90.37	8.64	0.90	0.00	0.09
PET	5.60	94.09	0.31	62.26	4.06	33.69	0.00	0.00
PVC	11.45	79.81	8.74	37.81	4.25	0.00	0.09	0.19
烟煤	49.88	30.56	15.38	79.31	3.14	2.64	1.98	1.30
褐煤	33.89	54.01	12.09	52.04	4.66	25.92	1.48	1.31
无烟煤	86.04	8.16	4.71	90.71	3.14	2.64	1.98	1.53

类别	工业分析(空气干燥基，质量分数)/%			元素分析（干燥无灰基）/%
类别	FC	V	A	C	H	O	N	S
PE	0.00	99.94	0.06	88.66	13.26	0.00	0.06	0.02
PP	0.00	99.18	0.82	83.75	13.98	2.27	0.00	0.00
PS	0.33	99.48	0.19	90.37	8.64	0.90	0.00	0.09
PET	5.60	94.09	0.31	62.26	4.06	33.69	0.00	0.00
PVC	11.45	79.81	8.74	37.81	4.25	0.00	0.09	0.19
烟煤	49.88	30.56	15.38	79.31	3.14	2.64	1.98	1.30
褐煤	33.89	54.01	12.09	52.04	4.66	25.92	1.48	1.31
无烟煤	86.04	8.16	4.71	90.71	3.14	2.64	1.98	1.53

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