| 摘要 |
PURPOSE:To obtain the titled carrier having excellent resistance to thermal shock and high surface area by using a material obtained by burning a mixture of alumina sol, an alkali titanate, molten silica, and a rare earth element substance as the carrier of a catalyst for purifying exhaust gas. CONSTITUTION:A mixture consisting of alumina sol such as a colloidal soln. of alumina hydrate in water, the titanates of lithium, sodium, etc., molten silica, and rare earth elements such as Ce, La, etc., is calcined at 1,000-1,300 deg.C to form a carrier of the catalyst for purifying exhaust gas from automobiles and industrial and public-welfare waste combustion gases. Consequently, a catalyst having large surface area, high catalytic activity, a low thermal expansion coefficient, and excellent resistance to thermal shock can be obtained at a low cost. |
