Hydrodesulfurization of 4, 6-dimethyldibenzothiophene is of great significance for emission reduction and environmental protection. Herein, the effects of Mg addition on CoMo/Al₂O₃ were systematically studied for the hydrodesulfurization of 4, 6-dimethyldibenzothiophene. The CoMo/Mg-Al₂O₃ was formed by incorporating Mg in the alumina lattice and showed excellent hydrodesulfurization performance compared to CoMo/Mg/Al₂O₃ formed after deposition of Mg on the alumina surface and to CoMo/Al₂O₃ without introducing Mg. Experimental characterization and theoretical calculations showed that the introduction of Mg is beneficial to the formation of β-CoMoO₄, which significantly promoted the production of CoMoS active sites. Meanwhile, the introduction of Mg mainly improved the medium-strong surface basic sites.

4，6-二甲基二苯并噻吩的加氢脱硫对于减排和环境保护具有重要意义。在此，系统地研究了Mg添加对CoMo / Al ₂ O ₃的影响，用于4，6-二甲基二苯并噻吩的加氢脱硫。通过将Mg掺入氧化铝晶格中形成CoMo / Mg-Al ₂ O ₃，与将Mg沉积在氧化铝表面后形成的CoMo / Mg / Al ₂ O ₃和CoMo / Al ₂ O ₃相比，CoMo / Mg-Al ₂ O ₃具有优异的加氢脱硫性能。不引入镁 实验表征和理论计算表明，引入的Mg是β-的CoMoO的形成有利₄，其显著促进了生产COMOS活性位点。同时，镁的引入主要改善了中等强度的表面碱性位。