Johnson Matthey Public Limited Company

Joanne Elizabeth Melville

Paul Richard Phillips

Guy Richard Chandler

Alexander Nicholas Michael Green

Stuart David Reid

Robert James Brisley

Elizabeth Hazel Mountstevens

Orla Keane

A heterogeneous catalyst article having at least one combination of a first molecular sieve having a medium pore, large pore, or meso-pore crystal structure and optionally containing a first metal, and a second molecular sieve having a small pore crystal structure and optionally containing a second metal, and a monolith substrate onto or within which said catalytic component is incorporated, wherein the combination of the first and second molecular sieves is a blend, a plurality of layers, and/or a plurality of zones.

[object Object]

A method of reducing nitrogen oxides (NO) present in a lean gas stream comprising nitric oxide (NO) comprises the steps of: (i) net adsorbing NO per se from the lean gas stream in an adsorbent comprising palladium and a cerium oxide at below 200&#xb0; C.; (ii) thermally net desorbing NO from the NO adsorbent in a lean gas stream at 200&#xb0; C. and above; and (iii) catalytically reducing NOon a catalyst other than the NO adsorbent with a reductant selected from the group consisting of a hydrocarbon reductant, a nitrogenous reductant, hydrogen and a mixture of any two or more thereof. A system for carrying out such a method is also disclosed.

Thermally regenerable nitric oxide adsorbent

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Withington, United Kingdom

Joanne Elizabeth Melville