Thermogravimetric Study on Co-pyrolysis of Different Rank Coals and Plastics

IF 0.8 4区 工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY
Xuebin Lin, Yuanbo Huang, Xiaodong Zhang, Hongzhou He
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Abstract

China is endowed with abundant coal reserves, yet it remains heavily reliant on oil and natural gas imports. Pyrolysis of coal into gas and oil products presents a promising solution to address China’s energy security concerns. Co-pyrolysis of coal and plastic can enhance the production of liquid and gas products. Thermogravimetric experiments were conducted to explore the effects of mixing ratio, coal type (bituminous and anthracite), and plastic type (polystyrene PS and polyethylene PE) on the co-pyrolysis of coal and plastic. The results showed that the interaction during the co-pyrolysis of coal and plastic occurred mainly in the temperature interval of plastic weight loss and contributed to the increase of pyrolytic conversion. Compared to theoretical calculations, conversion rates of coal/plastic blenders co-pyrolysis can be improved mostly at blending ratios of 50% PS and 75% PE, achieving increases of 7.9–8.9% and 4.2–7.2% for PS/coal and PE/coal at 800°C respectively. The synergistic effect of coal type on co-pyrolysis is influenced by both the blending ratio and the plastic type used. So does plastic type. Finally, the kinetic analysis of co-pyrolysis was carried out. It is found different weight loss stage of co-pyrolysis processes can be expressed by first order reaction.

Abstract Image

不同等级煤与塑料共热解的热重研究
中国拥有丰富的煤炭储量,但仍严重依赖石油和天然气进口。煤热解成天然气和石油产品是解决中国能源安全问题的一个有希望的解决方案。煤与塑料共热解可以提高液态和气态产物的产量。通过热重实验探讨了混合比、煤型(烟煤和无烟煤)、塑料型(聚苯乙烯PS和聚乙烯PE)对煤与塑料共热解的影响。结果表明:煤与塑料共热解过程中的相互作用主要发生在塑料失重温度区间,促进了热解转化率的提高;与理论计算结果相比,PS和PE配比为50%和75%时,煤/塑料共热解的转化率提高最多,在800℃时,PS/煤和PE/煤的转化率分别提高了7.9 ~ 8.9%和4.2 ~ 7.2%。煤型对共热解的协同效应受掺混比和所用塑料类型的影响。塑料型也是如此。最后,对共热解过程进行了动力学分析。发现不同失重阶段的共热解过程可以用一级反应来表示。
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来源期刊
Solid Fuel Chemistry
Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS
CiteScore
1.10
自引率
28.60%
发文量
52
审稿时长
6-12 weeks
期刊介绍: The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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