On the role of organic nitrogen-containing species as intermediates in the hydrocarbon-assisted SCR of NOx

Gorce, Olivier; Baudin, Francois; Thomas, Cyril; Costa, Patrick Da; Djéga‐Mariadassou, Gérald

doi:10.1016/j.apcatb.2004.05.022

Cited by 64 publications

(47 citation statements)

References 98 publications

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“…[3,10,17]. Previous studies pointed out that the oxygencontaining and nitrogen-containing compounds could be the intermediates related with the reaction pathway of NO x reduction [44,45]. Therefore, it is possible to deduce a reaction pathway by following the origin of trace products.…”

Section: So 2 Poisoning Mechanism In the Scr Of No Xmentioning

confidence: 99%

Review of Ag/Al2O3-Reductant System in the Selective Catalytic Reduction of NO x

Zhang

et al. 2008

Catal Surv Asia

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Ag/Al 2 O 3 is a promising catalyst for the selective catalytic reduction (SCR) by hydrocarbons (HC) of NO x in both laboratory and diesel engine bench tests. New developments of the HC-SCR of NO x over a Ag/ Al 2 O 3 catalyst are reviewed, including the efficiencies and sulfur tolerances of different Ag/Al 2 O 3 -reductant systems for the SCR of NO x ; the low-temperature activity improvement of H 2 -assisted HC-SCR of NO x over Ag/ Al 2 O 3 ; and the application of a Ag/Al 2 O 3 -ethanol SCR system with a heavy-duty diesel engine. The discussions are focused on the reaction mechanisms of different Ag/ Al 2 O 3 -reductant systems and H 2 -assisted HC-SCR of NO x over Ag/Al 2 O 3 . A SO 2 -resistant surface structure in situ synthesized on Ag/Al 2 O 3 by using ethanol as a reductant is proposed based on the study of the sulfate formation. These results provide new insight into the design of a high-efficiency NO x reduction system. The diesel engine bench test results showed that a Ag/Al 2 O 3 -ethanol system is promising for catalytic cleaning of NO x in diesel exhaust.

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Section: So 2 Poisoning Mechanism In the Scr Of No Xmentioning

confidence: 99%

Review of Ag/Al2O3-Reductant System in the Selective Catalytic Reduction of NO x

Zhang

et al. 2008

Catal Surv Asia

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“…HMOR are compared in Figure 9. In the spectra of Pd(0.3)Ce (2) Oxidation of NO to NO 2 is considered to be the first key step in the NO x SCR reaction involving hydrocarbons as reducing agents [61][62][63]. Figure 10 shows conversion of NO into in NO x CH 4 -SCR by oxidising NO to NO 2 [34].…”

Section: Diffuse Reflectance Uv-vis Spectroscopy (Drs Uvmentioning

confidence: 99%

On the enhancing effect of Ce in Pd-MOR catalysts for NOx CH4-SCR: A structure-reactivity study

Mendes‐Faia

Zholobenko

Thibault-Starzyk

et al. 2016

Applied Catalysis B: Environmental

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2 Graphical abstract NO oxida)onin ion-exchange position, probably in two different sites within the MOR framework.The addition of cerium to Pd-HMOR enhances its catalytic performance for NO x CH 4 -SCR.With 1 wt.% Ce, both NO x conversion into N 2 and CH 4 selectivity towards SCR have increased. Small CeO 2 clusters interacting with palladium are likely to play a major role in this catalytic reaction. The number of such species increases up to Ce loading of ca. 2 wt.%.However, above 3 wt%, NO x conversion values decrease with Ce loading, which is attributed to the formation of bulk CeO 2 species not interacting with palladium.

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“…Previous studies pointed out that the reaction pathway of NO x reduction was relative to the oxygen-and nitrogen-containing intermediates [20]. Fig.…”

Section: In Situ Driftsmentioning

confidence: 99%

Effect of hydrogen on reaction intermediates in the selective catalytic reduction of NOx by C3H6

Zhang

2007

Applied Catalysis B: Environmental

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Selective catalytic reduction of NO x by C 3 H 6 in the presence of H 2 over Ag/Al 2 O 3 was investigated using in situ DRIFTS and GC-MS measurements. The addition of H 2 promoted the partial oxidation of C 3 H 6 to enolic species, the formation of -NCO and the reactions of enolic species and -NCO with NO x on Ag/Al 2 O 3 surface at low temperatures. Based on the results, we proposed reaction mechanism to explain the promotional effect of H 2 on the SCR of NO x by C 3 H 6 over Ag/Al 2 O 3 catalyst. #

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On the role of organic nitrogen-containing species as intermediates in the hydrocarbon-assisted SCR of NOx

Cited by 64 publications

References 98 publications

Review of Ag/Al2O3-Reductant System in the Selective Catalytic Reduction of NO x

Review of Ag/Al2O3-Reductant System in the Selective Catalytic Reduction of NO x

On the enhancing effect of Ce in Pd-MOR catalysts for NOx CH4-SCR: A structure-reactivity study

Effect of hydrogen on reaction intermediates in the selective catalytic reduction of NOx by C3H6

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