This paper assesses the potential of plastics valorization by pyrolysis and in line catalytic dry reforming for syngas production. Previous studies showed the suitability of a continuous process made up of a conical spouted bed reactor for fast pyrolysis and a fluidized bed reactor for catalytic steam reforming. In order to step further in the application of this technology under dry reforming conditions, equilibrium simulation was approached to analyze process performance, as the development and optimization of this technology for the production of high-quality syngas requires understanding in detail the complex influence of process parameters. Thus, this study deals with the influence of main process parameters, namely, temperature, CO/C ratio and the type of plastic, on the process performance. Furthermore, the role played by steam co-feeding in the dry reforming in order to adjust syngas H/CO ratio was evaluated by varying the steam/carbon ratio. The obtained results clearly show that a strict control of process conditions is required to ensure high conversion to syngas and avoid undesired reactions, such as reverse WGS. Among the plastics studied, polyolefins are those of highest potential for syngas production, but polystyrene allows producing a high quality syngas through a combined reforming strategy.

中文翻译：

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深入了解通过热解和在线干重整来生产合成气的二氧化碳和废塑料的联合增值

本文评估了通过热解和在线催化干重整用于合成气生产的塑料增值潜力。先前的研究表明，由用于快速热解的锥形喷动床反应器和用于催化蒸汽重整的流化床反应器组成的连续工艺的适用性。为了进一步推进该技术在干重整条件下的应用，通过平衡模拟来分析工艺性能，因为该技术生产高品质合成气的开发和优化需要详细了解工艺的复杂影响。参数。因此，本研究探讨了主要工艺参数，即温度、CO/C 比和塑料类型对工艺性能的影响。此外，通过改变蒸汽/碳比率来评估在干重整中蒸汽共进料以调节合成气H/CO比率所发挥的作用。获得的结果清楚地表明，需要严格控制工艺条件，以确保合成气的高转化率并避免不良反应，例如反向 WGS。在所研究的塑料中，聚烯烃是合成气生产潜力最大的塑料，但聚苯乙烯可以通过组合重整策略生产高质量的合成气。