عنوان مقاله [English]
In this paper, the performance of various heterogeneous catalysts, such as catalysts containing vanadium, molybdenum, rhenium and zeolites for converting methanol to methylal has been studied. The studies show that the vanadium oxide catalysts in comparison to other catalysts have shown the better performance. Catalyst V2O5/TiO2 prepared by impregnation method and modified in acid at a temperature of 423 K has shown 93% selectivity and 49% conversion of methanol to methylal. Also, in this study, change factors such as the number of acidic sites, reaction temperature and pressure, different methods for catalyst preparation, calcination temperature on catalyst performance were evaluated. These studies have shown that among the various listed factors, number of acidic sites has most important role in catalyst selectivity towards the production of methylal. Studies show increasing excessive acidic site has negative effect on catalyst selectivity toward the production methylal.