An experimental study into the pyrolysis characteristics of waste tire rubber with catalyst addition

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chinese Journal of Chemical Engineering Pub Date : 2025-05-01 DOI:10.1016/j.cjche.2025.02.021

Xuanyu Ji , Hanyu Liu , Junting Chen , Xiong Zhou , Jianbo Li , Lu Yang , Weijian Lin , Ning Chen

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Abstract

In this paper, the pyrolysis characteristics of waste tire rubber with catalyst addition were experimentally studied. Pyrolysis experimentations of waste tire rubber with either base, acid or Zeolite catalysts were performed in a Thermal Gravimetric Analyzer, a one-stage test rig and a two-stage test rig respectively. This is followed by analysis into the rates of pyrolysis reactions and the yields and distribution of the three-phase products using thermogravimetric infrared spectroscopy (TG-IR) and gas chromatography-mass spectrometry (GC-MS). Results indicated that the transition metal chloride catalysts improved the reaction rate and were overall effective than the solid acid-base catalysts. Benzene and toluene yields were improved by all three catalysts in the primary pyrolysis, and the best performance was achieved at 550 °C and 600 °C with 30% NaOH. With ZSM-5 in the secondary pyrolysis, proportion of high calorific gases components as H₂ and CH₄ were increased, and the arylation and isomerization reactions were also promoted. The optimum aromatics yield was achieved at 600 °C and 50% ZSM condition. This study would provide a reference for resourceful utilization of waste tires.

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添加催化剂对废轮胎橡胶热解特性的实验研究

本文对废轮胎橡胶在催化剂的作用下的热解特性进行了实验研究。分别在热重分析仪、一段试验台和两段试验台对废轮胎橡胶进行了碱、酸、沸石催化剂的热解实验。然后利用热重红外光谱（TG-IR）和气相色谱-质谱（GC-MS）分析热解反应速率以及三相产物的产率和分布。结果表明，与固体酸碱催化剂相比，过渡金属氯化物催化剂提高了反应速率，整体效果更好。三种催化剂均能提高一次热解中苯和甲苯的收率，其中在550°C和600°C、30% NaOH条件下热解效果最佳。ZSM-5在二次热解过程中增加了H2和CH4等高热量气体组分的比例，促进了芳基化和异构化反应。在600℃和50% ZSM条件下，获得了最佳的芳烃产率。本研究可为废旧轮胎的资源化利用提供参考。

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来源期刊

Chinese Journal of Chemical Engineering 工程技术-工程：化工

CiteScore

6.60

自引率

5.30%

发文量

4309

审稿时长

31 days

期刊介绍： The Chinese Journal of Chemical Engineering (Monthly, started in 1982) is the official journal of the Chemical Industry and Engineering Society of China and published by the Chemical Industry Press Co. Ltd. The aim of the journal is to develop the international exchange of scientific and technical information in the field of chemical engineering. It publishes original research papers that cover the major advancements and achievements in chemical engineering in China as well as some articles from overseas contributors. The topics of journal include chemical engineering, chemical technology, biochemical engineering, energy and environmental engineering and other relevant fields. Papers are published on the basis of their relevance to theoretical research, practical application or potential uses in the industry as Research Papers, Communications, Reviews and Perspectives. Prominent domestic and overseas chemical experts and scholars have been invited to form an International Advisory Board and the Editorial Committee. It enjoys recognition among Chinese academia and industry as a reliable source of information of what is going on in chemical engineering research, both domestic and abroad.