Excellent selectivity for direct conversion of syngas to light olefins over a Mn-Ga oxide and SAPO-34 bifunctional catalyst

A bifunctional catalyst consisting of a Mn-Ga oxide and SAPO-34 was designed for the direct conversion of syngas to light olefins. A selectivity for olefins of 88.3% and 13.7% CO conversion were obtained. This selectivity is superior to those reported previously and is attributed to the presence of abundant oxygen vacancies and the moderate H-2 dissociation ability of the Mn-Ga oxide, and to the weak acidity of SAPO-34.