Polystyrene is a nondegradable lightweight foamy substance that easily blows from landfills into drains and waterways. This material creates litter and water pollution and harms the wildlife who mistakenly eat it. This study investigated a cost‐effective pyrolysis approach for catalytic conversion of waste polystyrene into useful oil and gas products. The Portland cement was used as a solid base to catalyze the pyrolysis reaction for improving the product yield, lowering the reaction temperature and shortening the reaction time. Optimum reaction conditions were investigated by varying the process temperature, process time, and amount of the catalyst. The catalytic conversion of polystyrene into oil was measured about 94.98% at 400°C. In noncatalytic conversion experiments, same conversion efficiency was achieved at 600°C, which is significantly higher than the catalytic conversion. Catalytic pyrolysis produced oil with major part of volatile fractions and 42.14% styrene. The thermal pyrolysis produced oil with high styrene content (63.17%). Overall, styrene content of oil product was lower than the reported values in the literature. The noncatalytic pyrolysis produced nonreactive gases toward the copper‐I solution while catalytic pyrolysis produced highly reactive gases. The presence of olefins and acetylene in gaseous form confirmed the presence of hydrogen in the product.

中文翻译：

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使用波特兰水泥固基催化剂对聚苯乙烯废料进行热解和熟料催化热解

聚苯乙烯是一种不可降解的轻质泡沫物质，很容易从垃圾填埋场吹入下水道和水道。这种材料会产生垃圾和水污染，并伤害误食它的野生动物。这项研究研究了一种经济有效的热解方法，用于将废聚苯乙烯催化转化为有用的石油和天然气产品。波特兰水泥被用作固体碱，以催化热解反应，从而提高了产物收率，降低了反应温度，缩短了反应时间。通过改变工艺温度，工艺时间和催化剂量来研究最佳反应条件。在400℃下测得聚苯乙烯到油的催化转化率为约94.98％。在非催化转化实验中，在600°C时达到了相同的转化效率，明显高于催化转化率。催化热解产生的油具有大部分挥发性馏分和42.14％的苯乙烯。热裂解产生的油具有较高的苯乙烯含量（63.17％）。总体而言，石油产品中的苯乙烯含量低于文献报道的值。非催化热解向铜I溶液产生非反应性气体，而催化热解产生高反应性气体。气态烯烃和乙炔的存在证实了产物中氢的存在。非催化热解产生了对铜-I溶液的非反应性气体，而催化热解产生了高反应性的气体。气态烯烃和乙炔的存在证实了产物中氢的存在。非催化热解产生了对铜-I溶液的非反应性气体，而催化热解产生了高反应性的气体。气态烯烃和乙炔的存在证实了产物中氢的存在。