Abstract:

According to the marine distillate’s characteristics of low sulfur, high nitrogen, and high acid cyclic alkyl, CNOOC Tianjin Chemical Research & Design Institute, has proposed using silicon modified pseudo-boehmite as the carrier material. During the preparation process of the catalyst, adding organic complexing agent develops the first generation of penta-dentate spherical THDS-I hydrofining catalyst at China National Offshore Oil Corporation. The result of the pilot evaluation indicates that THDS-I hydrofining catalyst has an outstanding hydrogenation performance and activity ability. Furthermore, the evaluation result of industrial amplification and industrial catalyst production states that THDS-I hydrogenation catalyst production is a reasonable and feasible program flow. Under appropriate proceess conditions, refinery could use THDS-I hydrofining catalyst to produce diesel which meets the national V sulfur content and quality standards.

Key words: diesel, hydrofining, catalyst, five teeth spherical, hydrogenation activity