Hierarchically Porous Beta-SBA-15 Material Synthesized from Beta Zeolite Seeds and Its Application in the Dibenzothiophene Hydrodesulfurization

摘要

Introduction For environmental reasons the sulfur level of fuels in many countries must be reduced to 10 ppm [1,2]. To meet the stringent regulation of S content, even the highly refractory molecules such as dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) must be desulfurized. Because of big molecule sizes and the steric hindrance from the alkyl substituents, it is hard to desulfurize the molecules of DBT and 4,6-DMDBT using the traditional hydrotreating catalysts. Micro-mesoporous materials with proper acidity and open porosity were considered as the ideal catalyst support candidates for HDS of sulfur compounds with steric hindrance effect [3]. In this work, Beta-SBA-15 composite material was successfully synthesized and the catalytic performance for the HDS of DBT over the corresponding supported-NiMo catalyst was investigated.