| 摘要 |
PURPOSE: A ternary catalyst is offered to reduce a generation and an exhaust amount of hydrocarbon(HC) which is not ignited. CONSTITUTION: A three-way catalyst is composed of: 30-80wt% of Al2O3, 5-40wt% of CeO2, 0.1-5wt% of Zr, 0.001-1wt% of pt, pd, ph in a wash coat composition ratio, and 1-30wt% of H-ZSM-5, Na-ZSM-5, H-mentioned, Na-mentioned, H-Y typed zeolite, and Na-y typed zeolite. A production method improves an absorption performance for hydrocarbon, which is not ignited at a low temperature, and it improves the performance of a catalyst for Co, NOx, and so on by reducing the exhaust quantity of the hydrocarbon.
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