Cu and Co exchanged ZSM-5 zeolites -: Activity towards no reduction and hydrocarbon oxidation

被引：14

作者：

Martins, L ^{[1
]}

Pablo, R ^{[1
]}

Peguin, S ^{[1
]}

Urquieta-González, EA ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Engn Quim, BR-13560970 Sao Carlos, SP, Brazil

来源：

QUIMICA NOVA | 2006年 / 29卷 / 02期

关键词：

Cu-x]SiyAl]-MFI; Co-x][SiyAl]-MFI; NO reduction; propane oxidation;

D O I：

10.1590/S0100-40422006000200009

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

vertical bar Cu-x vertical bar[SiyAl]-MFI and vertical bar Co-x vertical bar[SixAl]-MFI catalysts were prepared by ion exchange from vertical bar Na vertical bar[SiyAl]-MFI zeolites (y = 12. 25 and 45). The activity of the catalysts was evaluated in the reduction of NO to N-2 in an oxidative atmosphere using propane or methane as reducing agents. The Cu catalysts were only active with propane and they presented higher activity than the Co-based catalysts, the latter being active with both hydrocarbons. H-2-TPR and DRS-UV/Vis data allowed correlation between the activity towards NO reduction and the presence of cationic charge-compensating species in the zeolite. It was also verified that the hydrocarbons are preferentially oxidised by O-2, a reaction that occurs simultaneously with their oxidation with NO.

引用

页码：223 / 229

页数：7

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