Abstract

This study investigated the effect of input power and process time on microwave-metal interaction pyrolysis of pure plastics (PS, PP, LDPE) and their blends into liquid and gaseous fuels. The microwave power and time were varied to pyrolyze 20 g of each sample in an iron coil. The pure PS underwent maximum conversion into fuels followed by PP and LDPE. Under optimized microwave power (2100–2500 W), PS produced 88.7% oil after 19 min of reaction time, PP produced 54.65% oil at 23 min of reaction time and LDPE produced 30.15% oil after 26 min of reaction time. Pure PS and PP showed high conversion efficiency of 95.40% and 95.10%, respectively, into liquid and gaseous fuels. Pure LDPE showed only 54.30% conversion into fuels by producing large quantity of waxy residue. In blended form, PS-PP blend revealed highest conversion of 65.67% into fuels followed by PS-PP-LDPE blend (57.23%), PS-LDPE blend (46.52%) and PP-LDPE blend (28.08%). Based on mass balance and percentage conversion, PS-PP blend showed maximum conversion of 96.25% whereas PP-LDPE showed minimum conversion of 74.99%. Higher microwave powers within optimal range produced better yield of liquid fuel in shorter time periods. The pyrolytic oils contained some useful aromatic and aliphatic hydrocarbons (C₈–C₁₆).

Graphic Abstract

中文翻译：

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输入功率和处理时间对纯金属和混合塑料通过微波-金属相互作用热解转化为燃料的影响

摘要

这项研究调查了输入功率和处理时间对纯塑料（PS，PP，LDPE）及其混合物转化为液体和气体燃料的微波-金属相互作用热解的影响。改变微波功率和时间以在铁卷中热解20g的每个样品。纯PS经过最大程度地转化为燃料，其次是PP和LDPE。在优化的微波功率（2100–2500 W）下，PS在反应时间19分钟后产生88.7％的油，PP在反应时间23分钟处产生54.65％的油，而LDPE在26分钟反应时间之后产生30.15％的油。纯PS和PP分别显示出向液态和气态燃料的高转化率，分别为95.40％和95.10％。纯LDPE通过产生大量蜡状残留物，仅显示出54.30％的燃料转化率。PS-PP共混物的共混物转化率最高，为65。燃料中占67％，其次是PS-PP-LDPE混合物（57.23％），PS-LDPE混合物（46.52％）和PP-LDPE混合物（28.08％）。基于质量平衡和转化率，PS-PP共混物的最大转化率为96.25％，而PP-LDPE的最小转化率为74.99％。在最佳范围内，较高的微波功率可在较短的时间内产生更高的液体燃料收率。热解油包含一些有用的芳族和脂族烃（C₈ –C ₁₆）。

图形摘要