【Ten Years of Great Progress in Chemical Technology】Successful Application of Hydrogenation Arsenic Removal Catalysts for Naphtha from 2014 to 2023

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Ten years of rapid development in chemical engineering technology – praising the prosperity and strength of modern China. This is just a starting point; more participation will make things even more interesting. With you here, HaiChuan becomes even better. [Ten years of progress in chemical engineering equipment] – continuous updates and summaries available; feel free to join the discussions at https://bbs.hcbbs.com/thread-3576046-1-1.html. Enhance quality awareness and promote high-quality development. ----------------------------------------- In July 2023, the Petroleum and Petrochemical Research Institute of China (hereinafter referred to as the Institute) conducted industrial tests on the PAN-201 catalyst for hydrogen-based arsenic removal from naphtha, in a reformation pretreatment unit. The arsenic content in the resulting product was 0.8 ppb, meeting the requirements for ultra-deep arsenic removal. 　　The arsenic removal step in the reforming pre-refining unit acts as the first \"shield\" for the reforming catalyst, preventing unplanned shutdowns caused by arsenic poisoning in the catalyst; it is therefore of great importance for ensuring the long-term stable operation of the reforming unit. 　　Leveraging its experience in the development of catalysts for hydrogenation-based arsenic removal from gasoline, and taking into account the characteristics of naphtha, the Petrochemical Research Institute has precisely controlled the distribution of sites susceptible to arsenic poisoning on the catalyst as well as the rapid arsenic removal process. As a result, it has developed a catalyst for hydrogenation-based arsenic removal from naphtha that possesses low cost and high arsenic tolerance, with independent intellectual property rights owned by China National Petroleum Corporation; compared to similar commercial catalysts, this catalyst offers an arsenic tolerance that is over 10% higher. 　　The project team conducted a thorough analysis of the refinery reformate naphtha as well as extensive experiments, laying the foundation for the successful implementation of the industrial trials. During the application of this technology, the team’s technical personnel remained on site, closely monitoring various stages such as catalyst production, presulfurization, loading, commissioning, and oil feeding, to ensure that all critical steps were well controlled, ultimately leading to a successful first commissioning.