Mesostructured titania as support for the CoMoS active phase in deep HDS of 4,6-dimethydibenzothiophene leads to a modification of the main desulfurization way in contrast with the conventional CoMoS/alumina catalyst. Indeed, the dispersion of MoS₂ active phase onto mesostructured titania supports leads to catalysts, which favor the direct desulfurization of 4,6-dimethydibenzothiophene. We demonstrate that this unexpected behavior is related to the intrinsic acid properties of the supports, arising from the coexistence of amorphous phase with semi-crystalline anatase. Indeed, these solids present both Lewis and Brönsted acidities, which are conserved after the impregnation of cobalt and molybdenum. The characteristic and the efficiency of the mesoporous titania catalysts have been compared either with conventional Al₂O₃, used for hydrotreatment, or P25, a commercial TiO₂ support used as titania reference.

与传统的CoMoS /氧化铝催化剂相比，介孔结构的二氧化钛在4,6-二甲基二苯并噻吩的深层HDS中作为CoMoS活性相的载体导致了主要脱硫方式的改变。确实，MoS ₂的分散介孔结构的二氧化钛载体上的活性相导致催化剂，该催化剂有利于4，6-二甲基二苯并噻吩的直接脱硫。我们证明这种意外的行为与支持物的固有酸性质有关，这是由非晶相与半结晶锐钛矿的共存引起的。的确，这些固体同时具有路易斯酸和布朗斯台德酸度，在钴和钼浸渍后这些酸度得以保留。已将中孔二氧化钛催化剂的特性和效率与用于加氢处理的常规Al ₂ O ₃或用作二氧化钛参比的商用TiO ₂载体P25进行了比较。