Johnson Matthey Public Limited Company

Bruce Gomersall

Paul Joseph Andersen

Maria Theresia Brandmair

Alison Mary Wagland

Silvia Alcove Clave

Michael Nash

Rodney Foo

Sylvia Clave

Articles comprising a catalyst film comprising VOx, MoOor WO, and TiOdeposited on a substrate are disclosed. The articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases. Methods for producing such articles deposit a catalyst film on the substrate to form a coated substrate, which is then calcined. When used in an SCR process, the coated articles have enhanced activity for NOx conversion, reduced activity for SOx conversion, or both. Light-weight, coated articles having high catalyst loads can be fabricated at the same or reduced dimensions when compared with laminated articles, and increased kNOx/kSOx ratios are available even from coated articles having relatively thin catalyst films. The articles should have particular value for power plant operations, where coal and high-sulfur fuels are commonly used and controlling sulfur trioxide generation is critical.

Coated articles having high kNOx/kSOx ratios for selective catalytic reduction

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Reading, United Kingdom

Bruce Gomersall