Acid-Base Properties of Sulfided Ni-Mo-Y Zeolite Catalysts for Water-Gas Shift Reaction

Abstract The ability of Y zeolites containing nickel and molybdenum to catalyze the water-gas shift reaction with the sulfided feed was tested. Sulfided Ni-Mo-Y catalysts and zeolitic supports were characterized by the NO, NH 3 , BF 3 sorption capacity and by the capability to decompose diacetone and isopropyl alcohols. The influence of acid-base properties of studied catalysts on their activity in the WGS reaction was considered. It has been found that high WGS activity is caused not only by the synergy between Ni and Mo sulfided species but is also influenced by the the acidic OH groups originating both from the support itself and dissociative adsorption of hydrogen sulfide.