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Recently, the naphtha hydrodesulfurization catalyst PAN-201, independently developed by the Petrochemical Research Institute, was tested industrially in a reforming pre-purification unit. The arsenic content of the product was 0.8 ppb, meeting the requirement for ultra-deep desulfurization where the arsenic content must be less than 1.0 ppb; the unit started up successfully on the first attempt. Arsenides can easily cause permanent deactivation of precious metal catalysts. The arsenic removal step in the reforming pretreatment unit acts as the first \"shield\" for the reforming catalyst, preventing unplanned shutdowns due to arsenic poisoning and thus playing a very important role in 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 rate of arsenic removal through rapid reactions. As a result, it has developed a catalyst for hydrogenation-based arsenic removal from naphtha that features low cost and high tolerance to arsenic; compared with similar commercial catalysts, this catalyst offers a 10% or greater increase in arsenic tolerance. The project team conducted a thorough analysis of the refinery reformate naphtha as well as extensive experiments, laying a solid foundation for the successful execution of the industrial trials. During the technology application phase, the team’s technical personnel remained on site, closely monitoring every step of the process – catalyst production, presulfurization, loading, commissioning, and oil feeding – to ensure that all critical stages were well controlled, ultimately leading to a successful first commissioning.