Abstract: A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from exhaust gas comprising a zeolite having a silica/alumina molar ratio of greater than 55, and at least 1.5%, by weight, each of nickel and cobalt incorporated therein. A second embodiment of the is an adsorber catalyst system for use in the removal of the oxides of nitrogen from waste gas, the adsorber/catalyst system comprising the following components: (1) a zeolite having a silica/alumina ratio of greater than 55; (2) at least 1.5%, by weight, each of nickel and cobalt incorporated therein; and, (3) an adsorber component comprising a mixture of gamma alumina support and a adsorber material selected from the group consisting of metal oxides, metal hydroxides, metal carbonates and mixed metal oxides.

Abstract: A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from exhaust gas comprising a zeolite having a silica/alumina molar ratio of greater than 55, and at least 1.5%, by weight, each of nickel and cobalt incorporated therein. A second embodiment of the is an adsorber catalyst system for use in the removal of the oxides of nitrogen from waste gas, the adsorber/catalyst system comprising the following components: (1) a zeolite having a silica/alumina ratio of greater than 55; (2) at least 1.5%, by weight, each of nickel and cobalt incorporated therein; and, (3) an adsorber component comprising a mixture of gamma alumina support and a adsorber material selected from the group consisting of metal oxides, metal hydroxides, metal carbonates and mixed metal oxides.

Abstract: A method is disclosed for extruding thin-walled ceramic bodies. The method involves mixing into a homogenized batch a granular ceramic, a binder, a soluble oxidizing agent and a matrix precursor in amounts sufficient to provide a substantially water-free extrudable mixture. The batch is extruded into an atmosphere containing SO.sub.2 which permeates the extrudate and reacts with the oxidizing agent to form SO.sub.3 in situ. The SO.sub.3 catalyzes polymerization of the furfuryl alcohol to a rigid solid which prevents deformation of the extrudate.