Basf Corporation

Joseph J Petenko

Jaya L Mohanan

Ivan Petrovic

The present disclosure recognizes a correlation between zeolitic surface area (ZSA) of a catalyst composition and its catalytic activity. Particularly, the disclosure provides catalyst articles for diesel NOabatement, including a substrate and a washcoat layer containing metal-promoted molecular sieves, wherein the zeolitic surface area (ZSA) of the catalyst article is about 100 m/g or greater, the volumetric surface area is about 900 m/inor greater, and/or the total zeolitic surface area (tZSA) is about 1200 mor greater. The disclosure further relates to methods for evaluating ZSA, volumetric ZSA, and tZSA, e.g., including the steps of coating a catalyst composition comprising metal-promoted molecular sieves onto a substrate; calcining and aging the catalyst composition; determining the ZSA (or volumetric ZSA or tZSA) thereof; and correlating the ZSA (or volumetric ZSA or tZSA) with catalyst composition NOabatement activity to determine whether the catalyst composition is suitable for an intended use.

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Edison, NJ, United States of America

Joseph J Petenko