加氢处理催化剂制备技术研究进展

Research progress in preparation techniques of hydrotreating catalysts

从过渡金属硫化物催化剂活性相理论出发,认为在加氢催化剂制备过程中保证活性组分的适度分散和金属-载体之间适度的相互作用能提高加氢催化剂的性能。本文针对加氢处理催化剂的制备技术,综述了添加有机助剂、平衡吸附法、浆液浸渍法等浸渍改进技术以及水热沉积法、原位晶化法、化学气相沉积法等新型的制备技术,并介绍了相关的国内外研究进展。分析指出有机助剂能与载体、金属作用,进而改变金属在载体表面的存在形态,有利于高活性CoMoS相的生成;水热沉积法和原位晶化法能够使活性组分在载体上均匀吸附沉积,从而实现活性组分在载体上的分散,并形成堆积程度更高的高活性Ⅱ型活性中心。

Based on the active phase theory for transition metal sulfide catalysts, it was concluded that the performance of hydrotreating catalyst can be improved by increasing the dispersion of active species and by modifying the metal-support interaction in the preparation of hydrotreating catalyst. The improved technologies in the impregnation method, such as addition of organic additives, equilibrium deposition filtration, and slurry impregnation, and the novel preparation technologies, such as hydrothermal deposition method, in situ crystallization, and chemical vapor deposition, were reviewed. And the related research progresses were introduced. Organic additives could interact with support and metal, and then cause the morphology of metal change in the support surface. Therefore, more active type II CoMoS phases can be formed. Hydrothermal deposition method and in situ crystallization method could employed to produce catalyst with better dispersion and higher stacking degree of active metal species.