(544ct) Controllable Synthesis of Spherical Al-SBA-16 Mesoporous Materials with Different Crystal Sizes and Its High Isomerization Performance for Hydrodesulfurization

For the past few years, oil and its fractions, diesel and gasoline are the main automotive fuel. Air pollution caused by fuel combustion from gasoline or diesel powered motor vehicles has attracted more and more attention around the globe because of high sulfur content in most fuels. The stringent environmental regulations are made to limit the sulfur content in fuels as low as 10 ppm. Hydrodesulfurization (HDS) reaction is considered to be one of the most promising ways to eliminate sulfur from fuels.

Series Al-SBA-16 supports with different crystal sizes were fabricated by adding different inorganic salts to the synthesis system and used as the catalyst support for dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) hydrodesulfurization (HDS). The supports and the corresponding catalysts were well analyzed in depth to investigate their structure-property relationship. NiMo/AS-Mn catalyst with the smallest crystal sizes, the largest BET surface areas and the highest total acid & B acid contents displayed the highest k_HDS of 4,6-DMDBT and DBT. HYD was the preferential route for the DBT HDS over NiMo/AS-Mn, while ISO was the preferential pathway for 4,6-DMDBT HDS. Moreover, the DBT and 4,6-DMDBT HDS reaction networks over NiMo/AS-Mn were proposed.