Synthesis, Characteristic and Application of PAM Catalysts for Oxidative Desulfurization

Abstract

Oxidative desulfurization has been widely used in the desulfurization process for petroleum production. But conventional oxidative desulfurization catalyst was low desulfurization efficiency, low recycle use, and the mechanism was unclear. In this work, polyacrylamide (PAM) was first used in the loading of heteropolyacids and was used in oxidative desulfurization, which was prepared by simple reaction of each of the heteropolyacids and PAM. The optimal process condition for the catalyst was chosen by the single factor experiment. The optimal condition was as follows: the temperature was 60°C, the amount of the catalyst was 0.2 g, the oxygen to sulfur ratio was 16, and the reaction time is 100 minutes. Besides, the cycle use experiment indicated the desulfurization efficiency was high after 10 times. In the end, the oxidative desulfurization mechanism was put forward. The catalyst had a good industrial development prospect.