Exhaust gas purifying catalyst
AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorsHiroshi Tanada, Osamu Nakayam, Keisuke Tashiro, Kinichi Iwachido, Tetsuya Watanabe
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Abstract
In an exhaust gas purifying catalyst, an acid material with a high affinity with respect to an absorbing agent is dispersed and mixed in a catalyst layer, to which the absorbing agent is added, or a layer of the acid material is formed inside the catalyst layer in order to prevent the absorbing agent from moving from the catalyst layer into the carrier. This reduces the permeation of the absorbing agent added to the catalyst layer into a carrier, the evaporation and splash of the absorbing agent from the catalyst, and the deterioration in the durability and the exhaust gas purifying performance of the catalyst.
Claims19
An exhaust gas purifying catalyst, which includes a carrier and a catalyst layer and in which at least one of alkali metal and alkali earth metal is added as an absorbing agent to said catalyst layer, said exhaust gas purifying catalyst wherein:
- an inhibiting agent is provided in said catalyst layer in order to inhibit a movement of said absorbing agent in said catalyst.
Dependencies are inferred from the claim text.