汽油和柴油中含硫化合物加氢脱硫反应机理研究进展

环境保护意识的大幅度提升促使车用燃料质量标准日益严格,为实现汽油和柴油中硫含量不断降低的目标,迫切需要研发超深度脱硫技术.目前加氢脱硫技术是大规模工业化应用的关键技术,其核心是高效催化剂的研制.介绍了FCC汽油及柴油中所含各类硫化物的加氢脱硫反应路径,主要讨论了其中难以脱除的噻吩类、苯并噻吩类、二苯并噻吩类和4,6-二...

Research advance on reaction mechanism for the hydrodesulfurization of sulfur-containing compounds in gasoline and diesel

The quality specifications of vehicle fuels are more and more strict due to the increase in the consciousness of environmental protection. In order to achieve the goal of lower sulfur contents in gasoline and diesel, it is extremely urgent to develop the ultra deep desulfurization technologies. Currently hydro- desulfurization technology is the key technology of large-scale commercial application, and the core of hydrodesulfurization is the development of highly efficient catalysts. In this article, the typical hydrodes- ulfurization reaction pathways of different kinds of sulfides were introduced. The mechanisms of thio- phene, benzothiophene, dibenzothiophene and 4,6-dimethyldibenzothiophene, which were the representa- tive refractory sulfur-containing molecules, on different catalysts were mainly discussed. It will provide some theoretical directions for the design of the catalysts for the ultra-deep hydrodesulfurization.