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Recently, the project \"Key Technologies and Applications for Efficient and Low-Carbon Diesel Hydrogenation Based on Synergistic Regulation of Active Phases and Reaction Environment\", developed under the leadership of the Sinopec Research Institute of Petroleum, successfully passed the evaluation of scientific and technological achievements organized by the China Petroleum and Chemical Industry Federation. The appraisal expert group unanimously concluded that the achievements of this project are at an internationally leading level as a whole, and will provide solid scientific and technological support for the efficient and stable production of clean diesel in our country. Project Introduction: As the demand for environmental protection grows increasingly, China has set stricter requirements regarding the level of polycyclic aromatic hydrocarbons in diesel. Refining companies thus face the dual challenge of producing clean diesel efficiently and stably, while also reducing energy consumption and emissions. Focusing on **major demands**, and building on the key research and development program of the 13th Five-Year Plan titled “Key Technologies for Producing Clean Diesel Compliant with National VI Standards”, as well as various projects undertaken by Sinopec Corporation, the Institute of Petrology has collaborated with multiple organizations including Sinopec Jiujiang Branch, Sinopec Shanghai Gaqiao Petrochemical Co., Ltd., Sinopec Anqing Branch, Sinopec Engineering Construction Co., Ltd., and East China University of Science and Technology to carry out research and development on the project “Key Technologies and Applications for Efficient and Low-Carbon Diesel Hydrogenation via Synergistic Control of Active Phases and Reaction Conditions”. Project outcomes: Guided by the goal of resolving the key challenges in the production of clean diesel, the project team started with fundamental research to determine the structure of highly active phases, the mechanisms of deactivation, and the ideal reaction conditions, thereby establishing a theoretical foundation platform for precise hydrogenation catalysis in the production of highly active low-carbon diesel. Based on the theoretical research findings, diesel hydrogenation technologies such as the highly stable diesel hydrogenation catalyst RS-3100, the two-zone composite diesel hydrogenation process RTS-Apro for ultra-deep selective removal of polycyclic aromatic hydrocarbons, and the low-energy upstream two-zone composite diesel hydrogenation process SLHT were respectively developed. Industrial application results show that, compared with the reference catalyst, the deactivation rate of catalyst RS-3100 is significantly reduced, making it markedly superior to similar catalysts both domestically and internationally ； The RTS-Apro process can produce clean diesel with a polycyclic aromatic hydrocarbon content of 1%~3%, and the hydrogen utilization efficiency is significantly improved ； Compared to similar technologies, the SLHT process consumes less energy, resulting in significant energy and carbon savings. The catalysts and process technologies developed for this project have been widely applied in industrial facilities, yielding significant economic and social benefits. On April 27, the Petrochemical Federation held a project appraisal meeting; the meeting was chaired by Cao Xianghong and Yuan Qingtang, academicians of the Chinese Academy of Engineering, with Zhao Xiaomin, the vice president of the Petrochemical Research Institute, and over 20 industry experts from the participating organizations in attendance. The evaluation committee unanimously concluded that the project outcomes are generally at the international leading level. Moving forward, the Petroleum Research Institute will further expand the application scope of key technologies for the efficient and low-carbon hydrogenation of diesel, providing robust technological support for the efficient and stable production of clean diesel, as well as energy conservation and carbon reduction in plant operations.