Design and synthesis heteropolyacid modified mesoporous hybrid material CNTs@MOF-199 catalyst by different methods for extraction-oxidation desulfurization of model diesel

The supported catalysts of Mo 16 V 2 loaded with CNTs@MOF-199 are produced via three means including microwave method (CNTs@MOF-199-Mo 16 V 2 (M)), one-pot method (CNTs@MOF-199-Mo 16 V 2 (O)) and impregnation method (CNTs@MOF-199-Mo 16 V 2 (I)), respectively. The structure of the target materials is characterized by means of several analysis methods, and the effect of catalyst on removal of thiophene is investigated with the molecular oxygen as oxidant and the dimethyl formamide (DMF) as extraction solvent . The reaction conditions including catalyst dosage, reaction temperature, oxygen quantity and stirring speed are investigated. The experiment result shows that the catalyst synthesized by one-pot method has the best performance, and the efficiency can reach 100% under the optimum conditions. On the basis of kinetic study , thiophene oxidation shows the kinetic characteristic of a first order reaction, and then rate constant and activation energy were obtained. In addition, response surface design (RSD) is designed and applied to verify the optimum reaction conditions.