EFFECT OF PREPARATION METHOD OF TiSBA-15 ON HYDROTREATING ACTIVITY OF GAS OIL USING NiMo CATALYSTS

摘要

Catalytic hydrotreating (HDT) is one of the most important processes in the petroleum-refining industry from technical, economic, and environmental points of view. The problems which petroleum industry is currently facing is that a significant part of the reserves consists of heavier fractions with a high content of contaminants such as sulfur, nitrogen, (poly)-aromatics, and metals [1]. Heavier crudes and bitumens tend to be richer in both sulfur and nitrogen. While hydrotreating is relatively effective in removing sulfur down to low concentrations, hydrodenitrogenation (HDN) is much harder to accomplish. The demand for lower sulfur and nitrogen content in fuels requires the synthesis of more active catalysts. This has led to a worldwide search for better catalysts for hydrotreating of these compounds. One approach includes the improvement of existing sulfide catalysts and the investigation of new compositions such as carbide, nitride, phosphides, heteropoly acid and another approach is to find a suitable support.