| 简介 |
FIELD : gas treatment catalysts.
SUBSTANCE : method of preparing exhaust gas treatment catalyst comprises : (i) providing at least one type of compounds selected from carboxylic acids having hydroxy or mercapto group and number of carbon atoms from 2 to 20; dicarboxylic acids with 2 or 3 carbon atoms; and monocarboxylic acids with 1-20 carbon atoms; (ii) adding at least one compound selected from above group to aqueous sulfate solution including Al and rare-earth element; (iii) complete evaporation of aqueous carboxylic acid to produce carboxylic acid-based polymer complex; (iv) heating the latter to temperature no higher than 1000°C to form aluminum oxide; and (v) depositing palladium on thus obtained aluminum oxide. Described are also aluminum oxide as carrier for palladium wherein aluminum oxide is represented by PrAlO3 or NdAlO3 as well as exhaust gas treatment catalyst prepared by above-described method, wherein palladium is supported by LnAlO3 (Ln : rare-earth metal), and equipment for exhaust gas treatment catalyst.
EFFECT : improved quality of running engine event at low temperature during starting or idling.
6 cl, 3 dwg, 3 tbl, 10 ex |
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