柴油超深度脱硫技术进展

降低柴油中硫含量对于提高汽车尾气排放质量从而保护环境具有十分重要的意义。生产超低硫柴油的技术主要有加氢脱硫(HDS)和非加氢脱硫两大方法。概述了深度加氢脱硫的机理和需要解决的关键问题。柴油的深度加氢脱硫需要有效分解馏分油中的4,6-二苯并噻吩(4,6-DMDBT)等难脱除的化合物。提出了研制高活性深度HDS催化剂的思路和途径并介绍了近年国内外柴油深度加氢脱硫研究的成果。此外对非加氢脱硫技术中的吸附法、氧化法和生物技术深度脱硫的研究近况也做了介绍。加氢方法和非加氢方法的有机结合是十分有前途的生产超低硫柴油的手段。

Research advances in the ultra deep desulfurization of diesel fuel

Lowering sulfur content of diesel fuel has an important significance on improving the quality of tail gas exhausted from automobiles and protecting the environment.The production of ultra low sulfur diesel mainly depends on hydrodesulfurization and non-hydrodesulfurization technologies.The mechanism of deep hydrodesulfurization and brings forward research gaps needed to be resolved is outlined.The deep hydrodesulfurization of diesel fules requires the decomposition of refractory compounds such as 4,6-dimethyldibenzothiophene(4,6-DMDBT).Design approaches to the catalysts of deep hydrodesulfurization are discussed.New research development in recent years on catalysts and processes of diesel deep hydrodesulfurization are also introduced.Moreover,the non-hydrodesulfurization methods by adsorption,oxidation,or biology are presented.The organic combination of hydrodesulfurization and non-hydrodesulfurization technologies has a promising prospect in the production of ultra low sulfur diesel.