Diesel soot combustion perovskite

For all these reasons, the aim of this chapter is not to conclude which are the best and worst soot combustion catalysts, but only to compile the information available in the literature about the diesel soot combustion perovskite catalysts. 

CATALYTIC COMBUSTION OF DIESEL SOOT ON PEROVSKITE TYPE OXIDES... 

Zheng, J., Liu, J., Zhao, Z., Xu, J., Duan, A., and Jiang, G. (2012) The synthesis and catalytic performances of three-dimensionally ordered macroporous perovskite-type LaMni- Fe Oa complex oxide catalysts with different pore diameters for diesel soot combustion. Catal Today, 191,146-153. 

The general formula of perovskites is ABO3, and soot combustion perovskite catalysts with many different cations have been reported for both A and B positions [7]. For instance, DoggaU et al. [8] prepared BaRuOs perovskites by coprecipitation method and its catalytic activity was tested for diesel soot oxidation with O2. The catalytic activity was attributed to the dissociative adsorption of oxygen on the catalyst surface, and was postulated that the 120 planes of BaRuOs can have abundant Ru atoms that can facilitate the O2 dissociation. The advantage of using this perovskite with regard to pure ruthenium oxide was attributed to the thermal stability of Ru within the BaRuOs matrix as well as basicity offered by Ba. 

Study of Soot Combustion Perovskite Catalysts in Real Diesel Exhausts 1445... 

Herndndez, S., Blengini, GA., Russo, N., and Pino, D. (2012) Kinetic study of diesel soot combustion with perovskite catalysts. Ind. Eng. Chem. Res., 51, 7584-7589. 

Three-dimensionally ordered macroporous LaCo Fei 03 perovskite-type complex oxide catalysts for diesel soot combustion. Catal. Today, 153, 136-142. 

Y.N., Duan, A.J., and Jiang, G.Y. (2010) Macroporous perovskite-type complex oxide catalysts of Lai K Coi Fej,03 for diesel soot combustion. /. Rare Earth, 27, 955-960. 

Zhang, G., Zhao, Z., Liu, J., et al. (2009). Macroporous Perovskite-type Complex Oxide Catalysts of Lai xkxCOi Yfey03 for Diesel Soot Combustion, J. Rare Earths, 27, pp. 955-960. 

Catalytic combustion of diesel soot particulates over LaMnOs perovskite-type oxides prepared by malic acid method has been studied. In the LaMn03 catalyst, the partial substitution of alkali metal ions into A site enhanced the catalytic activity in the combustion of diesel soot particulates and the activity was shown in following order Cs>K>Na. In the LarxCs MnOj catalyst, the catalytic activity increased with an increase of X value and showed constant activity at the substitution of x>0.3... 

Some examples of lanthana as catalysts included the dehydration/dehydrogenation of ethanol [21], the NOx decomposition [4], the NO reduction by methane [22], the oxidative coupling of methane [23, 24] and the combustion of diesel soot [25], As perovskites, the lanthanum compounds showed catalytic activity in fuel combustion [26], carbon monoxide hydrogenation [27], dry reforming of methane [28-30], and partial reforming of methane [31],... 

In spite of the successful utilization of perovskite catalysts by some authors in real diesel exhaust, some basic research seems still necessary to understand the effect of SO2, H2O, and CO2 in the catalytic combustion of soot, and advanced perovsldte synthesis methods should also be developed in order to prepare high-surfece-area perovskite nanocrystals. 

Li, L., Shen, X., Wang, P., Meng, X., and Song, E. (2011) Soot capture and combustion for perovskite La-Mn-O based catalysts coated on honeycomb ceramic in practical diesel exhaust. Appl. 

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