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Critical Review of Catalysis for Ethylene Oxychlorination
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-07-20 , DOI: 10.1021/acscatal.0c01698
Hongfei Ma 1 , Yalan Wang 1 , Yanying Qi 1 , Kumar R. Rout 1, 2 , De Chen 1
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-07-20 , DOI: 10.1021/acscatal.0c01698
Hongfei Ma 1 , Yalan Wang 1 , Yanying Qi 1 , Kumar R. Rout 1, 2 , De Chen 1
Affiliation
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Ethylene oxychlorination is the key technology in vinyl chloride (VCM, the monomer of PVC, polyvinyl chloride) production to close the chlorine loop by consuming the HCl released from the former cracking step. Due to the high demand for PVC, this leads to ethylene oxychlorination being one of the most important processes in the industry. This Review covers an in-depth analysis of the dynamic nature of active sites for the main and side reactions involved in ethylene oxychlorination, featuring the findings and viewpoints from the dynamic kinetics study and analysis under industrial operating conditions. A unified picture of the mechanism of the surface reactions, and the effect of supports and promoters, has been presented based on the decoupled redox-cycle experiments, which leads to a significantly better understanding of the mechanism and provides valuable guidelines for effective catalyst design. Operando techniques and kinetic tools of the rate-diagram, as well as their application to the study of the redox-cycle in ethylene oxychlorination and kinetic models on both the main product and byproduct, are also reviewed. Perspectives on challenges and new process development and future research focus for better study of the VCM production chemistry are also proposed.
中文翻译：
乙烯氧氯化反应的催化评论
乙烯氧氯化是氯乙烯（VCM，PVC的单体，聚氯乙烯）生产中的关键技术，它通过消耗从前一个裂解步骤中释放的HCl来闭合氯回路。由于对PVC的大量需求，这导致乙烯氧氯化反应成为工业上最重要的工艺之一。这篇综述涵盖了对乙烯氧氯化反应中主要反应和副反应活性位点动态性质的深入分析，重点介绍了在工业操作条件下进行动态动力学研究和分析的发现和观点。根据去耦的氧化还原循环实验，已经给出了表面反应机理以及载体和助催化剂作用的统一图景，从而可以更好地理解其机理，并为有效的催化剂设计提供了宝贵的指导。还回顾了速率图的操作技术和动力学工具，以及它们在乙烯氧氯化反应中氧化还原循环的研究中的应用以及主要产物和副产物的动力学模型。还提出了对挑战和新工艺开发的观点以及对VCM生产化学的更好研究的未来研究重点。
更新日期：2020-08-21
中文翻译：
乙烯氧氯化反应的催化评论
乙烯氧氯化是氯乙烯（VCM，PVC的单体，聚氯乙烯）生产中的关键技术，它通过消耗从前一个裂解步骤中释放的HCl来闭合氯回路。由于对PVC的大量需求，这导致乙烯氧氯化反应成为工业上最重要的工艺之一。这篇综述涵盖了对乙烯氧氯化反应中主要反应和副反应活性位点动态性质的深入分析，重点介绍了在工业操作条件下进行动态动力学研究和分析的发现和观点。根据去耦的氧化还原循环实验，已经给出了表面反应机理以及载体和助催化剂作用的统一图景，从而可以更好地理解其机理，并为有效的催化剂设计提供了宝贵的指导。还回顾了速率图的操作技术和动力学工具，以及它们在乙烯氧氯化反应中氧化还原循环的研究中的应用以及主要产物和副产物的动力学模型。还提出了对挑战和新工艺开发的观点以及对VCM生产化学的更好研究的未来研究重点。
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