INTERACTION OF V2O5-NAY ZEOLITE WITH H2S AND SO2

V2O5-NaY zeolite catalyst was prepared by vacuum impregnation of ammon ium metavanadate solution in water on NaY-zeolite (zeolite). The slurr y was filtered, washed, dried, and calcined at 600-degrees-C. On heati ng the catalyst at 450-degrees-C in vacuum, VO2+ species were detected by e.s.r. It was observed that the electron-accepting and -donating s ites increased when V2O5 or vanadium species were loaded on it. Vanadi um species poisoned the active sites of the zeolite that were responsi ble for the formation of SO2- ions. Pretreated V2O5-NaY zeolite with S O2 plays an important role in the formation of VO2+ species when it is treated with H2S at room temperature. V2O5-NaY zeolite can be used fo r the reduction of SO2 by H2S.