【摘要】 依据过渡金属硫化物催化剂的活性相理论及加氢脱硫、脱芳反应的历程,综述了各种提高柴油加氢精制催化剂性能的方法——使用高加氢能力的活性组分、引入中等强度酸中心、减弱活性组分与载体间的相互作用以及提高活性组分的分散度;介绍了相关的国内外最新研究进展,指出研究开发高比表面积、中等酸性的介孔载体和既能提高活性组分分散度又不增强活性组分与载体间相互作用的新型催化剂制备方法是提高柴油加氢精制催化剂性能的主要途径。更多还原

【Abstract】 Production of clean diesel fuel with a low even ultra-low sulfur content and high cetane number is becoming an urgent task for refineries over the world.Among the various methods for producing clean diesel fuel,improving catalytic activity of hydrotreating catalysts is the most effective and economical one.Starting from the active phase theory for transition metal sulfide hydrotreating catalysts and the pathways of hydrodesulfurization and hydrodearomatization reactions,this review summarizes various approaches to improving the activity of hydrotreating catalysts to meet the needs of diesel fuel deep hydrodesulfurization and hydrodearomatization.The methods reviewed include:(Ⅰ)enhancing hydrogenation performance of active species;(Ⅱ)introducing acidic centers with moderate acidity;(Ⅲ)weakening metal-support interaction;(Ⅳ)improving the dispersion of active species.We conclude that developing a new support with high surface area and moderate acidity and exploring new catalyst preparation methods to increase the dispersion of active species without strengthening metal-support interaction are two of the main routes to further increase performance of diesel hydrorefining catalysts.更多还原