Oxidative Desulfurization of Simulated Gasoline over Metal Oxide-loaded Molecular Sieve

摘要

A simulated gasoline consisting of model sulfur compounds of thiophene(C4H4S)and 3-methythiophene (3-MC4H4S)dissolved in n-heptane was tested for the oxidative desulfurization in the hydrogen peroxide(H2O2) and formic acid oxidative system over metal oxide-loaded molecular sieve.The effects of the oxidative system, loaded metal oxides,phase transfer catalyst,the addition of olefin and aromatics on sulfur removal were investi- gated in details.The results showed that the sulfur removal rate of simulated gasoline in the H2O2/formic acid sys- tem was higher than in other oxidative systems.The cerium oxide-loaded molecular sieve was found very active catalyst for oxidation of simulated gasoline in this system.The sulfur removal rates of C4H4S and 3-MC4H4S were enhanced when phase transfer catalyst(PTC)was added.However,the sulfur removal rate of simulated gasoline was reduced with the addition of olefin and aromatics.