Total Oxidation of Heavy Hydrocarbons and Aromatics

The use of biodiesel under low thermal regime has been shown to produce lower HC emissions than diesel produced from the refining of fossil sources however, unburned methyl esters from biodiesel were more susceptible to particulate matter formation following atmospheric dilution due to their low volatility and the participation of the diesel oxidation catalyst that enhanced the process [6]. The composition of the diesel also affects the catalyst ability to reduce the total HC emissions before release to the atmosphere [5]. 

On the other hand, halogenated compounds and more specially chlorinated and brominated ones are still used for several purposes. Most of them have moderate to high toxicity, which is mainly due to the fact that these substances 

PerovsHtes and Related Mixed Oxides Concepts and Applications, First Edition. 

Edited by Pascal Granger, Vasile I. Parvulescu, Serge Kallagulne, and Wilfrid Prellier. 

Mixed oxide systems of well-defined ABO3 structure (perovskites), although not exclusively, are more stable in the presence of such compoimds and appeared as a reasonable alternative. Based on this, the aim of this chapter is to highlight and compare selected examples of perovskites and related oxides in total oxidation of heavy hydrocarbons and aromatics and their halogenated derivatives. The perovskite structure encompasses a wide array of materials with differing physical, chemical, and electronic properties. 

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Studies reported to date confirmed the successful replacement of noble metals by perovskites in total oxidation of heavy hydrocarbons and aromatics. Besides activity, these materials allow a good stability, especially in the presence of halogens. Another relevant advantage is the very large composition of these... 

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