NO by propene

I.V. Yentekakis, R.M. Lambert, M.S. Tikhov, M. Konsolakis, and V. Kiousis, Promotion by sodium in emission control catalysis A kinetic and spectroscopic study of the Pd-catalyzed reduction on NO by propene, J. Catal. 176, 82-92 (1998). 

The reduction of NO by propene is of great importance in automotive exhaust catalysis. 

Figure 9.17. Reduction of NO by propene on Pt/p -AI203.7,25 Effect of catalyst potential on the rate of N2 production, (a) linear rate scale, (b) logarithmic scale. T=375°C, p ,0 =1.27 kPa ppropene =1-47 kPa (A) and 0.60 kPa (O). Reprinted from ref. 7 with permission from the Institute for Ionics.

Selective Reduction of NO by Propene over Au/y-AljOj Catalysts... 

Shimizu, K.I., Kawabata, H., Maeshima, H. et al. (2000) Intermediates in the selective reduction of NO by propene over Cu-Al203 catalysts Transient in-Situ FTIR study, J. Phys. Chem. B, 104, 2885. 

Meunier, F.C., Breen, J.P., Zuzaniuk, V. et al. (1999) Mechanistic aspects of the selective reduction of NO by propene over alumina and silver-alumina catalysts, J. Catal., 187, 493. 

Figure 10.4. Reaction scheme proposed for the reduction of NO by propene over Pt/Al203 (200-250°C) (reproduced with permission from [68]).

Zhang, RD Villanueva, A Alamdari, H Kaliaguine, S. Catalytic reduction of NO by propene over LaCoi.xCuxOs perovskites synthesized by reactive grinding, Catal, B Environmental, 2006, Volume 64, Issues 3-4, 220-233. 

Meunier, FC Zuzaniuk, V Breen, JP Olsson, M Ross, JRH. Mechanistie differenees in the selective reduction of NO by propene over eobalt- and silver-promoted alumina catalysts kinetic and in situ DRIFTS study. Catal. Today 2000, Volume 59, Issues 3-4, 287-304. 

Reactions involving the catalytic reduction of NO are of major environmental importance [98]. Accordingly, we have used EP by Na to study NO reduction by CO and by propene in the absence and presence of oxygen over Pt, Rh, and Cu catalysts. In every case, the results indicate that NO dissociation is the crucial reaction-initiating step and that Na strongly promotes the reaction by triggering dissociation of NO. We now illustrate this important class of reactions in more detail by considering a specific case the EP by Na of the catalytic reduction of NO by propene over platinum. 

Studies with Au-based catalysts have focused on SCR of NO by propene [61,96,489,492,493], carbon monoxide [78,489,494] and hydrogen [4,5,83,489]. Urea [97], methane [495] and other hydrocarbons [489,496,497] have also been used. SCR using the first three reagents will be discussed here. 

Ueda and Haruta has shown that NO conversion is very low (about 8%) in the absence of oxygen [489]. The addition of oxygen in the reactant stream appreciably enhanced the reduction of NO up to a conversion of 69% (at an oxygen concentration of 4 vol%). The conversion to N2 remains almost constant in the oxygen concentration range of 6-20 vol%. Therefore, oxygen is indispensable for the reduction of NO by propene. The steady conversion... 

Electrochemical Promotion in Emission Control Catalysis The Role of Na for the Pt-Catalysed Reduction of NO by Propene... 

This paper is a continuation of this work to a potentially more important system EP of the Pt-catalysed reduction of NO by propene. Propene is a major constituent of the hydrocarbon component in lean-bum exhaust and the industry standard for catalyst testing. 

Mechanism of Selective Catalytic Reduction of NO by Propene on Fe Silicate in Oxygen-Rich Atmosphere... 

In both studies (16, 17), the catalysts exhibited pore size distributions characteristic of alumina in general i.e., they were mesoporous solids. They attempted to selectively reduce NO by propene in the presence of dioxygen at temperatures... 

Dorado E, de Lucas-Consuegra A, Vemoux P, Valverde JL (2007) Electrochemical promotion of platinum impregnated catalyst for the selective catalytic reduction of NO by propene in presence of oxygen. Appl Catal B Environ 73 42-50... 

Liese T, Griinert W (1997) Cu-Na-ZSM-5 Catalysts Prepared by Chemical Transport Investigations on the Role of Brpnsted Acidity and of Excess Copper in the Selective Catalytic Reduction of NO by Propene. J Catal 172 (l) 34—45... 

This process was used to synthesize a number of perovskite formulations, which were then extensively characterized for their catalytic properties such as oxygen storage capacity [49], water vapor sensitivity [50], conversion of CO and exhaust gas emissions [48], sensitivity to CO adsorption [39,40], reduction of NO by propene [51-53], reduction of NO either by CO [54] or by C3H5 [55-58], synthesis of higher alcohols [56,59], CO hydrogenation [60], oxidation of stearic acid [61], and methanol [62]. 

Zhang, R., Villanueva, A., Alamdari, FI., and Kaliaguine, S. (2006) Cu-and Pd-substituted nanoscale Fe-based perovskites for selective catalytic reduction of NO by propene. /. Catal, 237 (2), 368-380. 

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