Catalyst system for the reduction of NO x

Details Catalyst system for the reduction of NO x Catalyst system for the reduction of NO x

2008-07-15

2008-07-15

Johnson, Edward M. (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

Reexamination Certificate

active

10743646

ABSTRACT:
A catalyst system comprising a catalyst and a reductant is disclosed. The catalyst comprises a metal oxide catalyst support, a catalytic metal oxide, and a promoting metal. The catalytic metal oxide comprises gallium oxide, indium oxide or a combination of the two. The promoting metal comprises at least one of silver, cobalt, vanadium, molybdenum, tungsten, zinc, tin and bismuth. The catalyst comprises about 5 to about 31 mol % catalytic metal oxide and about 0.5 to about 9 mol % promoting metal. The reductant comprises a fluid hydrocarbon having at least 4 carbon atoms. Also disclosed is a process for reducing NOxto N2using the disclosed catalyst system by mixing NOxwith a reductant and passing the mixture through a catalyst of the disclosed catalyst system.

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