| 摘要 |
A process for the removal of carbon monoxide, hydrocarbons, and nitrogen oxides in an oxidizing exhaust gas comprising contacting the exhaust gas with a catalyst comprising a crystalline zeolite having the following characteristics: a) a Si/Al atomic ratio between 5 and 100; b) a pore size in the range of from about 0.5 to about 1.3 nm; c) essentially no octahedral aluminum detectable by 27Al NMR spectroscopy; d) a sodium ion exchange capacity, with regard to total aluminum content, of greater than 75%; e) a copper content in the range of from about 0.5 wt. % to about 12 wt. %; and f) a silver content in the range of from about 0.25 wt. % to about 20 wt. %.
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