Sulphur Transfer Reaction of FCC Gasoline over Solid Compound Acid Catalyst

Solid compound acid catalyst exhibited good sulphur transfer activity for catalyzing alkylation of thiophene with olefins. The effect of total acid amount including Brown acid and Lewis acid in solid compound acid catalyst with different loading ratio of silica and aluminum, load of compound acid, mass ratio of compound acids and calcine temperature on the catalyst activity was investigated. Solid compound acid catalyst showed the highest sulphur transfer activity with 93.7% conversion of thiophene under the condition of mass ratio of Si/(Si+Al) between 0.6 and 0.7 in load, 60% of compound acid on loading and the calcine temperature of catalyst between 500 ℃ and 550 ℃. The hydrocarbon component hardly changed, olefine content decreased slightly and the octane value of gasoline reduced by 0.2 unit after the alkylation reaction.