Improved sulfur poisoning resistance of nickel dispersed on various supports in presence of Ce⁴⁺ ions in butane hydrogenolysis

Effects of the oxidation state of cerium on the reactivity and sulphur resistance of Ni0/zeolite, Ni0/silica and Ni0/CeO2 catalysts in butane hydrogenolysis

“…We have shown that Ce3+ ions considerably improve the activity of nickel metal for methanation.15 Moreover, a study of the sulphur resistance of these nickel catalysts dispersed on oxide supports has been undertaken, and the preliminary results obtained show that the deactivations observed seem to be dependent on the acid-base properties of the support and/or the presence of the Ce3+/Ce4+ redox couple. 16 This work is a study of the effect the Ce3+/Ce4+ couple on the catalytic and sulphur-resistance properties of metallic nickel particles dispersed on oxide supports that differ in their acid-base properties (X and A zeolites, silica) or their reducibility (CeO,).…”