CsxCo/Na-MOR coating on monoliths for co-adsorption of hydrocarbons mixture and selective catalytic reduction of NOx

TISCORNIA, INES; GÓMEZ, LETICIA; DEHARBE, MILAGROS; SERRA, RAMIRO; BOIX, ALICIA

Santa Fe

Workshop; French Argentinean Workshop on Heterogeneous Catalysis; 2023

INCAPE-IC2MP

The great efforts worldwide to reduce emissions from vehicles continue to advance; a major goal is to reduce NOx and hydrocarbons (HCs) emissions during the cold start conditions. An after-treatment technology is to adsorb the harmful gases at a low temperature in a trap and later release and convert them at a higher temperature (light-off temperature). Then, improving the efficiency of post-treatment catalysts requires the design and development of materials. Zeolites have been widely used as support material for HC traps due to their diversity of structure, chemical composition, pore size, and versatility to incorporate different cations to improve adsorption-retention capacity.On the other hand, selective catalytic reduction using HCs has been an alternative that allows the use of a mixture of gases similar to those found in the exhaust stream, and which catalysts applying metal-exchange zeolites have been developed. In recent studies, different strategies have been proposed in order to couple adsorption processes and selective catalytic reductions. In this work, CsxCo/Na-MOR coating on cordierite monoliths were evaluated to apply them in the HCs mixture adsorption (butane-toluene), as well as in the selective catalytic reduction of NO (SCR) with O2 excess using that gaseous mixture as reducing agents.