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貴金屬分布設(shè)計(jì)對單級雙載催化器性能的影響
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國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)資助項(xiàng)目(2006AA03Z462)


Influences of Precious Metals Distribution Design on the Performances of the Converter with Two substrates
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    摘要:

    面對單級雙載催化器的應(yīng)用需求，研究了貴金屬Pd、Rh在兩塊載體上的分布對催化器活性和抗老化性的影響。結(jié)果表明，Pd、Rh在兩塊載體上的分布對催化器的催化活性和抗老化性均造成顯著影響；對于不同催化器，高Pd比例催化劑同處進(jìn)氣端或排氣端時(shí)，Pd比例越高越有利于提高催化活性和抗老化性；對同一套催化器，高Pd催化劑在進(jìn)氣端時(shí)性能優(yōu)于在排氣端時(shí)；而負(fù)載相同Pd、Rh比例的催化劑組合未表現(xiàn)出明顯的性能優(yōu)勢。說明在單級雙載催化系統(tǒng)中對兩塊催化劑上的貴金屬進(jìn)行合理地分布設(shè)計(jì)對更有效地控制尾氣排放和提高使用壽命是非常重要的

    Abstract:

    The converters with two catalysts in every one were prepared and their catalytic activity and anti-aging ability were studied with the distribution changes of palladium and rhodium contents on the two substrates. The results show that the two metals distribution influences the converter activity and anti-aging ability significantly, and for the different converters, a higher content of Palladium in the catalysts all near to the inlet or the outlet is more helpful to enhance the converter catalytic activity and anti-aging ability. For the same converter, the performances were higher when the catalyst loading more Palladium is near to the inlet, but without obvious performance advantage for the converter with same Pd/Rh ratio on the two substrates. It is indicated that designing a precious metals distribution reasonably on the two substrates is very important for increasing the using life of single converter with two substrates and controlling the vehicle exhaust emission effectively

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張愛敏,賀小昆,劉沁曦,楊文勇,張 永.貴金屬分布設(shè)計(jì)對單級雙載催化器性能的影響[J].稀有金屬材料與工程,2009,38(9):1663~1666.[Zhang Aimin, He Xiaokun, Liu Qinxi, Yang Wenyong, Zhang Yong. Influences of Precious Metals Distribution Design on the Performances of the Converter with Two substrates[J]. Rare Metal Materials and Engineering,2009,38(9):1663~1666.]
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  • 收稿日期:2008-09-15
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