Macroporous 3D carbon-nitrogen(CN) confined MoOx catalyst for enhanced oxidative desulfurization of dibenzothiophene

Macroporous 3 D carbon doped with nitrogen confined Mo catalyst(MoO@CN) had been prepared by a facile one-step pyrolysis technique using silica as a template and was employed for oxidative desulfurization(ODS) of dibenzothiophene(DBT) in model fuel with HOas oxidant.The effect of different ope rating conditions(i.e.,reaction te mperature and time,catalyst dosage,HO/DBT(O/S) molar ratio) were also systematic investigated.Under the optimal reaction condition,MoO@CN catalyst exhibited highly excellent ODS performance toward DBT,the highest sulfur removal efficiency can be up to 99.9% and sulfur content was wiped out from 800 ppm to 10 ppm.Due to the robust 3 D structure promoting rapid transfer,in addition to the increased number of active sites induced by the Mo vacancies,the catalyst,prepared using chitosan and ammonium heptamolybdate in a mass ratio of 1:0.5,displayed rapid kinetics and low activation energy in the oxidation of dibenzothiophene.Moreover,it exhibited excellent recyclability after five cycles without any obvious decrease in catalytic activity for the oxidative desulfurization reaction.