The hydrodeoxygenation (HDO) of m-cresol was investigated over supported molybdenum oxide catalysts at 340 °C under 4 MPa as total pressure. All catalysts were fully characterized using several techniques such as atomic absorption, N₂ physisorption, XRD, H₂-TPR, NH₃-TPD, Raman spectroscopy, TEM analysis and oxygen chemisorption. It was noted that the reducibility of molybdenum species depends on the support used and follows the same order than the one determined from the HDO activity, i.e. MoO_x/Al₂O₃ > MoO_x/SBA–15 > MoO_x/SiO₂. In addition, the use of an ordered mesoporous silica support (SBA-5) or an acidic support (Al₂O₃) favored significantly the dispersion of MoO_x particles compared to SiO₂.

Under these experimental conditions, m-cresol transformation underwent through two parallel deoxygenation routes which involved either the direct CO bond scission leading to toluene (DDO route), or the total hydrogenation of the aromatic ring yielding mainly to a mixture of methylcyclohexene isomers (HYD route). Regardless of the support used, the DDO route was always predominant. A reaction mechanism was proposed to explain the formation of toluene, the main product observed from HDO of m-cresol. To explain the formation of this aromatic, a selective adsorption through the oxygen atom of the phenolic reactant on oxygen vacancies, acting as HDO active sites, was proposed.

的加氢脱氧（HDO）米甲酚混合物在340℃下4兆帕调查在负载钼氧化物催化剂为总压力。使用几种技术，例如原子吸收，N ₂物理吸附，XRD，H ₂ -TPR，NH ₃ -TPD，拉曼光谱，TEM分析和氧化学吸附，对所有催化剂进行了全面表征。值得注意的是，钼的还原性取决于所用的载体，其顺序与从HDO活性确定的顺序相同，即MoO _x / Al ₂ O ₃  > MoO _x / SBA-15> MoO _x / SiO ₂。另外，与SiO ₂相比，使用有序的介孔二氧化硅载体（SBA-5）或酸性载体（Al ₂ O ₃）显着促进了MoO _x颗粒的分散。

在这些实验条件下，中号通过其中涉及任一直接C上两个平行脱氧路由甲酚转化后行O键断裂导致甲苯（DDO路线），或芳环主要屈服于甲基环己烯异构体的混合物的总加氢（HYD路线）。无论使用何种支持，DDO路线始终占主导地位。提出了一种反应机理来解释甲苯的形成，主要产品从HDO观察米甲酚。为了解释这种芳族化合物的形成，提出了通过酚类反应物的氧原子在作为HDO活性位点的氧空位上的选择性吸附。