Basf Corporation

Subramanian Prasad

Jaya L Mohanan

Ahmad Moini

Stanley Allen Roth

Wen-Mei Xue

Jeff H Yang

Martin C Wende

Kenneth Edwin Voss

Xiaofan Yang

Ivan Petrovic

Barbara K Slawski

Qi Fu

Saeed Alerasool

Sandip D Shah

Haiyang Zhu

Joseph Palamara

The present disclosure relates to copper-containing molecular sieve catalysts that are highly suitable for the treatment of exhaust containing NOx pollutants. The copper-containing molecular sieve catalysts contain ion-exchanged copper as Cuand Cu(OH), and DRIFT spectroscopy of the catalyst exhibits perturbed T-O-T vibrational peaks corresponding to the Cuand Cu(OH). In spectra taken of the catalytic materials, a ratio of the Cuto the Cu(OH)peak integration areas preferably can be &#x2265;1. The copper-containing molecular sieve catalysts are aging stable such that the peak integration area percentage of the Cupeak (area Cu/(area Cu+area Cu(OH))) increases by &#x2264;20% upon aging at 800&#xb0; C. for 16 hours in the presence of 10% HO/air, compared to the fresh state.

Selective catalytic reduction articles and systems

The present disclosure generally provides a catalyst composition comprising a zeolite containing iron and/or copper with a reduced amount of extra-framework aluminum. The catalyst composition is useful to catalyze the reduction of nitrogen oxides in exhaust gas in the presence of a reductant.

Zeolite with reduced extra-framework aluminum

Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low NO formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings disposed thereon, for example, a zoned coating comprising an upstream zone comprising a coating layer comprising a steam-activated iron-containing molecular sieve and a downstream zone comprising a coating layer comprising a high copper-containing molecular sieve.

Described are catalyst materials and catalytic articles comprising a metal exchanged SAPO material comprising a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

Stabilized metal-exchanged SAPO material

Molecular sieves, improved methods for their synthesis, and catalysts, systems and methods of using these molecular sieves as catalysts in a variety of processes such as abating pollutants in exhaust gases and conversion processes are described. The molecular sieves are made using a tailored colloid including an alumina source, a silica source and a structure directing agent.

Molecular sieve precursors and synthesis of molecular sieves

Growing community of inventors

Edison, NJ, United States of America

Subramanian Prasad