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

共 12 条

[1] NO adsorption, desorption, and reduction by CH4 over Mn-ZSM-5
Aylor, AW
Lobree, LJ
Reimer, JA
Bell, AT
[J]. JOURNAL OF CATALYSIS, 1997, 170 (02) : 390 - 401
[2] The influence of the preparation methods on the catalytic activity of platinum and gold supported on TiO2 for CO oxidation
Bamwenda, GR
Tsubota, S
Nakamura, T
Haruta, M
[J]. CATALYSIS LETTERS, 1997, 44 (1-2) : 83 - 87
[3] AN FTIR STUDY OF THE SPECIES ADSORBED ON A RH/AL2O3 CATALYST IN THE SELECTIVE REDUCTION OF NO BY PROPYLENE
BAMWENDA, GR
OBUCHI, A
OGATA, A
MIZUNO, K
[J]. CHEMISTRY LETTERS, 1994, (11) : 2109 - 2112
[4] SELECTIVE REDUCTION OF NITRIC-OXIDE WITH PROPENE OVER PLATINUM-GROUP BASED CATALYSTS - STUDIES OF SURFACE SPECIES AND CATALYTIC ACTIVITY
BAMWENDA, GR
OGATA, A
OBUCHI, A
OI, J
MIZUNO, K
SKRZYPEK, J
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 1995, 6 (04) : 311 - 323
[5] BAMWENDA GR, 1995, J PHOTOCH PHOTOBIO A, V89, P77
[6] Characterization of acid sites on gamma-alumina and chlorinated gamma-alumina by P-31 NMR of adsorbed trimethylphosphine
Guillaume, D
Gautier, S
Despujol, I
Alario, F
Beccat, P
[J]. CATALYSIS LETTERS, 1997, 43 (3-4) : 213 - 218
[7] SELECTIVE REDUCTION OF NITROGEN MONOXIDE WITH PROPANE OVER ALUMINA AND HZSM-5 ZEOLITE - EFFECT OF OXYGEN AND NITROGEN-DIOXIDE INTERMEDIATE
HAMADA, H
KINTAICHI, Y
SASAKI, M
ITO, T
TABATA, M
[J]. APPLIED CATALYSIS, 1991, 70 (02): : L15 - L20
[8] Haruta M, 1997, CATAL TODAY, V36, P53
[9] Nakamoto K., 1997, Infrared spectra of inorganic and coordination compounds Part A: Theory and Applications in Inorganic Chemistry, V5th
[10] OBUCHI A, 1998, APPL CATAL B-ENVIRON, V478, P1

← 1 2 →