Abstract Energy and exergy analysis is a practical thermodynamic method to assess the potentiality of waste-to-energy technologies. In this study, plastic wastes were pyrolyzed in a rotary kiln to recover energy products including gas, oil and char. The effects of heat carrier loading in the kiln and plastic waste types on the pyrolysis process, including carbon distribution, properties of liquid oil/gas, energy and exergy of products, were investigated. Heat carrier loading could enhance the energy and exergy efficiency of the pyrolysis process. The exergy and energy efficiencies of the plastic mixture pyrolysis are in the range of 60.9 %–67.3 % and 59.4–66.0 %, respectively. The energy consumption ratio of polyethylene pyrolysis with 15 % heat carrier loading and plastic mixture pyrolysis with 20 % heat carrier loading showed that the pyrolysis could achieve self-heating by combusting some recycled gas and char products. This work provided an reliable assessment of potentiality of pyrolysis with heat carrier for converting plastic wastes into fuels.

中文翻译：

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热载体回转窑废塑料热解的火用及能量分析

摘要 能量和火用分析是一种实用的热力学方法，可用于评估废物转化为能源技术的潜力。在这项研究中，塑料废物在回转窑中被热解以回收能源产品，包括天然气、石油和炭。研究了窑炉中载热体和塑料废物类型对热解过程的影响，包括碳分布、液态油/气的性质、能量和产品的火用。载热体加载可以提高热解过程的能量和火用效率。塑料混合物热解的火用和能量效率分别在 60.9%–67.3% 和 59.4–66.0% 的范围内。15%热载体负载的聚乙烯热解和20%热载体负载的塑料混合物热解的能耗比表明热解可以通过燃烧一些回收气体和焦炭产物来实现自热。这项工作为利用热载体热解将塑料废物转化为燃料的潜力提供了可靠的评估。