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TRIPLE ACTION CATALYST FOR CAR EXHAUST AFTERBURNER AND A METHOD FOR ITS MANUFACTURING
TRIPLE ACTION CATALYST FOR CAR EXHAUST AFTERBURNER AND A METHOD FOR ITS MANUFACTURING
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机译:汽车尾气净化器的三重作用催化剂及其制造方法
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摘要
A three-way catalyst construction, including its method of making, which deploys palladium and rhodium as precious metal catalysts, and lanthanum oxide and titania as a nonprecious metal catalyst, in a unique combination and in a unique manner. The three-way catalyst construction for automotive emission control, such catalyst being applied to a mechanical carrier having a support comprised substantially of alumina, comprises: (a) a discontinuous lanthanum oxide coating on the support; (b) a catalytic precious metal compound of palladium and rhodium, where rhodium is no greater than 10% by proportion of the palladium with palladium being at least 60% by weight of the precious metal catalyst, said precious metal catalyst being discontinuously supported on the decorated support; and (c) a nonprecious metal catalytic compound of titanium oxide disposed discontinuously on or about said precious metal catalyst compound and lanthana.
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