Based on the three-dimensional center-radial framework structure of dendritic mesoporous silica nanospheres (DMSNs), a unique type of hierarchical micro-mesoporous composite material, namely, Beta-DMSNs (BD) was prepared through a nano-assembly method, which was utilized as superior supports for high-efficiency catalysts (NiMo/BD) for hydrodesulfurization (HDS) of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). The controllable introduction of Beta nanocrystals endows the NiMo/BD catalysts with more acidic and catalytic active sites, and shows no influence on the dendritic morphology of the mesoporous supports, resulting in the remarkable HDS performance of NiMo/BD catalysts. Owing to the dendritic open channels, high surface area, abundant acidic sites and highly dispersed MoS₂ active phases, the optimized NiMo/BD exhibited superior HDS activities of 99.1% and 98.3% for DBT and 4,6-DMDBT, respectively, with the optimal reaction rate constant of 3.0 × 10⁻⁷ mol g⁻¹ s⁻¹ and 2.4 × 10⁻⁷ mol g⁻¹ s⁻¹, and with the turnover frequency of 5.9 × 10⁻⁴ s⁻¹ and 4.8 × 10⁻⁴ s⁻¹. Besides, the enhanced Brønsted acid and the synergistic effect of Brønsted & Lewis acid contributed to the superior isomerization selectivity for 4,6-DMDBT, which was conducive to its HDS.

基于树枝状介孔二氧化硅纳米球（DMSNs）的三维中心-径向骨架结构，通过纳米组装方法制备了一种独特的分级微介孔复合材料，即Beta-DMSNs（BD）。用作二苯并噻吩（DBT）和4,6-二甲基二苯并噻吩（4,6-DMDBT）加氢脱硫（HDS）高效催化剂（NiMo/BD）的优质载体。Beta纳米晶的可控引入赋予NiMo/BD催化剂更多的酸性和催化活性位点，并且对介孔载体的枝晶形貌没有影响，从而使NiMo/BD催化剂具有显着的HDS性能。由于树枝状的开放通道、高表面积、丰富的酸性位点和高度分散的MoS ₂优化后的NiMo/BD对DBT和4,6-DMDBT的HDS活性分别为99.1%和98.3%，最佳反应速率常数为3.0 × 10 -7 mol ^g -1 ^s -1^和2.4 × 10 ^-7 mol g ^-1 s ^-1，周转频率为5.9 × 10 ^-4 s ^-1和4.8 × 10 ^-4 s ^-1。此外，增强的布朗斯台德酸和布朗斯台德&路易斯酸的协同作用使得4,6-DMDBT具有优异的异构化选择性，有利于其HDS。