Silica-titania (70/30) supported vanadium catalysts were prepared, characterized, and studied in oxidative dehydrogenation of sulfur-contaminated methanol. The quality of vanadia species is dependent on temperature and gas conditions during preparation, support type, support specific surface area and VO_x surface density. For example, upon heating the amount of V₂O₅ decrease along with formation of polymeric species. Such changes may occur also during the catalytic reaction. The reaction experiments and characterization results showed that the stability of polymeric vanadia species and total acidity has a connection with better formaldehyde production performance. The best performance was observed for N₂-calcined silica-titania catalyst. Easy reducibility of the catalyst, as in the case of reference catalysts, leads to further oxidation of formaldehyde.

制备、表征和研究了二氧化硅-二氧化钛 (70/30) 负载的钒催化剂用于硫污染甲醇的氧化脱氢。钒物质的质量取决于制备过程中的温度和气体条件、载体类型、载体比表面积和 VO _x表面密度。例如，在加热时，V ₂ O ₅的量随着聚合物物质的形成而减少。这种变化也可能在催化反应过程中发生。反应实验和表征结果表明，聚合钒物种的稳定性和总酸度与较好的甲醛生产性能有关。_{观察到 N 2}的最佳性能-煅烧二氧化硅-二氧化钛催化剂。与参考催化剂一样，催化剂的易还原性导致甲醛进一步氧化。