Kinetic and in situ DRIFT spectroscopy studies of NO oxidation, and reduction by C3H6 in excess O2 over γ-Al2O3 and Au/γ-Al2O3

被引：13

作者：

Bamwenda, GR ^{[1
]}

Obuchi, A ^{[1
]}

Ogata, A ^{[1
]}

Oi, J ^{[1
]}

Kushiyama, S ^{[1
]}

Yagita, H ^{[1
]}

Mizuno, K ^{[1
]}

机构：

[1] AIST, Natl Inst Resources & Environm, Tsukuba, Ibaraki 3058565, Japan

来源：

SCIENCE AND TECHNOLOGY IN CATALYSIS 1998 | 1999年 / 121卷

关键词：

D O I：

10.1016/S0167-2991(99)80077-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The in situ DRIFT spectroscopy studies of NO and NO2 SCR were performed on gamma-Al2O3 and Au/gamma-Al2O3. The obtained results indicate that the initiation of NO SCR on Au/gamma-Al2O3 involves the oxidation of NO to NO2 at active centers at the interface between Au and Al2O3 followed by coupling of the NO2 or its adspecies, NOx-, with activated C3H6 on active sites on Al2O3 to form CnHmNxOy species, which are responsible for the propagation step. Its subsequent internal rearrangement and decomposition leads to the formation of N-2 and other products. Taken together, the obtained results suggest that the NO2 intermediacy benefits the NO SCR over gold catalysts as a reaction initiator or oxygen transfer agent.

引用

页码：263 / 268

页数：6