Development of Ag/Al2O3 Catalyst for the Reduction of NOx in Exhaust Gases from Lean-burn Natural-gas-fueled Engines

Satokawa, Shigeo; Yamaseki, Ken-ichi; Hoshi, Fumiyuki; Yahagi, Masahiro; Yokota, Hidehiro; Uchida, Hiroshi; Furuyama, Masataka; Sumiya, Satoshi; Yoshida, Kiyohide

doi:10.1016/s0167-2991(99)80098-6

Cited by 7 publications

(1 citation statement)

References 10 publications

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“…700 K for the SCR by light hydrocarbon such as C 3 H 8 , which is the main component of unburned hydrocarbons in lean-burn and diesel exhausts. 10 Hence, the enhancement of the activity of Ag/Al 2 O 3 catalysts is desired at lower temperatures.…”

Section: Introductionmentioning

confidence: 99%

Promotion effect of hydrogen on surface steps in SCR of NO by propane over alumina-based silver catalyst as examined by transient FT-IR

Shibata

Shimizu

Satokawa

et al. 2003

Phys. Chem. Chem. Phys.

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The mechanistic cause of enhancement of C 3 H 8 -SCR activity by addition of H 2 over Ag/Al 2 O 3 was investigated with in-situ FT-IR spectroscopy. Under a flow of NO + C 3 H 8 + O 2 , nitrates were mainly formed on Ag/Al 2 O 3 . An addition of H 2 into a C 3 H 8 -SCR atmosphere increased the concentration of surface acetate significantly, but decreased the concentration of surface nitrates. Formation and consumption rates of acetate and nitrates were estimated with transient in-situ IR measurement. By the addition of H 2 , both formation rates of acetate and nitrates were increased. Moreover, both consumption rates of nitrates in a flow of C 3 H 8 + O 2 and acetate in a flow of NO + O 2 were also increased by the addition of H 2 . From a comparison between the evolutions of adsorbed species (nitrate and acetate) and gaseous species (NO and C 3 H 8 ), it was clarified that the NO reduction activity is controlled by partial oxidation of C 3 H 8 to mainly surface acetate. The addition of H 2 results in remarkable promotion of partial oxidation of C 3 H 8 to mainly surface acetate, which is the rate-determining step of C 3 H 8 -SCR in the absence of H 2 .

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Section: Introductionmentioning

confidence: 99%

Promotion effect of hydrogen on surface steps in SCR of NO by propane over alumina-based silver catalyst as examined by transient FT-IR

Shibata

Shimizu

Satokawa

et al. 2003

Phys. Chem. Chem. Phys.

Self Cite

129

139

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show abstract

Promotion effect of hydrogen on lean NOx reduction by hydrocarbons over Ag/Al2
Satokawa
¹
,
Shibata
²
,
Shimizu
³

et al. 2007
Chemical Engineering Science
38
1
23
0
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Enhancement by H2 of C3H8-SCR of NOx using Ag/γ-Al2O3

Hernández-Terán

Fuentes

2014

Fuel

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Development of Ag/Al2O3 Catalyst for the Reduction of NOx in Exhaust Gases from Lean-burn Natural-gas-fueled Engines

Cited by 7 publications

References 10 publications

Promotion effect of hydrogen on surface steps in SCR of NO by propane over alumina-based silver catalyst as examined by transient FT-IR

Promotion effect of hydrogen on surface steps in SCR of NO by propane over alumina-based silver catalyst as examined by transient FT-IR

Promotion effect of hydrogen on lean NOx reduction by hydrocarbons over Ag/Al2
Satokawa
¹
,
Shibata
²
,
Shimizu
³

et al. 2007
Chemical Engineering Science
38
1
23
0
View full text Add to dashboard Cite

Enhancement by H2 of C3H8-SCR of NOx using Ag/γ-Al2O3

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Development of Ag/Al2O3 Catalyst for the Reduction of NOx in Exhaust Gases from Lean-burn Natural-gas-fueled Engines

Cited by 7 publications

References 10 publications

Promotion effect of hydrogen on surface steps in SCR of NO by propane over alumina-based silver catalyst as examined by transient FT-IR

Promotion effect of hydrogen on surface steps in SCR of NO by propane over alumina-based silver catalyst as examined by transient FT-IR

Promotion effect of hydrogen on lean NOx reduction by hydrocarbons over Ag/Al2Satokawa1, Shibata2, Shimizu3 et al. 2007Chemical Engineering Science381230View full textAdd to dashboardCite

Enhancement by H2 of C3H8-SCR of NOx using Ag/γ-Al2O3

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Product

Resources

About

Promotion effect of hydrogen on lean NOx reduction by hydrocarbons over Ag/Al2
Satokawa
¹
,
Shibata
²
,
Shimizu
³

et al. 2007
Chemical Engineering Science
38
1
23
0
View full text Add to dashboard Cite