Development of catalysts for CO_2 methanation: effect of addition of Mg, La or K on the structure and activity of Ni/γ-Al_2O_3 catalysts

摘要

The addition of small quantitiesof Mg and La to Ni/γ-Al_2O_3 catalyst has effect on .the.surface concentration and interaction of Ni species with the alumina support. These changes affect/t6 the activity and selectivity of Ni caYalysts in the methanation of CO_2. Among the elements studied, the addition of Mg and,in less-extension, La improves the activity of the Ni/Al_2O_3 catalyst.