Contribution information

Title Pressure Drop and Conversion in Catalytic Filters for Automotive Exhaust Gas Aftertreatment
Status Accepted
Final type Lecture
Final session Reaction engineering and catalysis
Authors J., Němec1, P., Kočí2
1 University of Chemistry and Technology, Prague, Prague, Czechia
2 UCT Prague, Prague, Czechia
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Brief content Combustion engine exhaust gases contain microscopic particles of soot. There can be other deleterious substances adsorbed to the surface of the soot particle, e. g. products of partial oxidation of fuel, polycyclic carbohydrates or sulfates. Amount of particulate matters is regulated by emission standards. This is why particulate filters are integral to all diesel cars and, nowadays, the EU considers tehir installation to vehicles equipped with gasoline engine. Particulate filter, however, is a barrier in an exhaust system which causes a pressure drop and a decrease of efficiency. Pressure drop is a studied specification of all particulate filters – it is necessary to find an optimum between high filtration efficiency and low pressure drop. This study discusses an influence of a layer of clogged particulates on the pressure drop of the filter as well as the possibilities of its regeneration by oxidizing the soot. This work also shows the dependence of the pressure drop on the washcoat location (either on-wall layer or inside the porous wall) in case of catalytic filters. We also present the conversion of pollutants for these samples.
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