Manufacture of catalyst support

Abstract

Abstract PURPOSE:To manufacture a CeO2-containing catalyst having an oxygen storing effect, by a procedure in which activated alumina obtained by quickly dehydrating aluminium hydroxide is mixed with cerium oxide, granulated, cured, and then baked to obtain a three-way catalyst. CONSTITUTION:As a three-way catalyst for cleaning exhaust gas from internal cumbustion engine, an activated alumina of an ignition loss of 5-20%, obtained by quickly dehydrating aluminium hydroxide in a high-temperature gas, is mixed with cerium oxide or cerium hydroxide in an amount of 10-18% (as CeO2 of a purity of 90% or more), granulated, cured in a saturated steam, dried, and then baked at 800-1,100 deg.C. The catalyst thus obtained, containing CeO2 having an oxygen storing effect,can clean NOx, CO, and hydrocarbons effectively and concurrently.

Inventors

• 👤 Hiroo Kinoshita
• 👤 Fumiyoshi Noda
• 👤 Hideaki Ueno

Bibliographic Details