Activation of hydrous titanium oxide-supported catalysts for HYD (hydrogenation), HDS (hydrodesulfurization), and HDO (hydrodeoxygenation) reactions.

摘要

Hydrous titanium metal oxide catalysts are extremely versatile materials that have promise as coal liquefaction catalysts. Previous studies have shown that they perform well in both batch and bench-scale coal liquefaction tests. Efforts to improve preparation and activation procedures for these catalysts have identified several promising research areas that either have or may lead to enhancements in catalyst activity. For example, addition of Si to the support of NiMo HTO catalysts has yielded 2- to 3-fold increases in surface areas and has resulted in a 33% increase in hydrogenation activity and a doubling of hydrodeoxygenation activity compared to an HTO catalyst without Si. In addition, it may be possible to maintain the high atomic dispersion of the metals at reaction conditions by calcining prior to ion exchange of the metal onto the support or reducing the calcination temperature. 6 refs., 4 figs., 1 tab.