Abstract: In the absence of system hydrogen supply, Fujian Refining & Petrochemical Co., Ltd. successfully initiated its semi-regenerative catalytic reforming unit using nitrogen as the initial medium for the first time, achieving the production of on-spec hydrogen. Upon completion of reforming feed preparation, hydrocracking heavy naphtha was introduced as feedstock, resulting in the rapid production of qualified hydrogen. This provided a hydrogen source for the pre-hydrogenation section, enabling a reversed start-up sequence characterized by "reforming first, pre-hydrogenation later". This paper details key stages including start-up preparations, oil feeding, system integration, operating parameters, and product quality optimization. Furthermore, it analyzes and summarizes the feasibility, critical operating procedures, and influencing factors of the nitrogen start-up mode, providing valuable insights for the commissioning of similar units under hydrogen-deficient or low-hydrogen conditions.

Key words: catalytic reforming, nitrogen start-up, SR-1000 catalyst, operational optimization