Catalyst body and methods
OwnerPatrick David Tepesch, Raja Rao Wusirikainventors
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Abstract
Disclosed are a catalyst and a catalyst body as defined herein and methods of use and manufacture.
Claims20
A metal-molecular sieve catalyst for use in selective catalytic reduction of nitrogen oxides, the catalyst made by a process comprising:
- preparing a mixture of zeolite and a compound of a formula MRn where M is a metal having a +2 oxidation state and R is an organic ligand comprising a high electronegativity moiety, and n is an integer from 1 to 4;
- and
- calcining the mixture.
A catalyst body for use in selective catalytic reduction of nitrogen oxides, the catalyst body prepared by a process comprising:
- preparing a mixture of a molecular sieve and a compound of a formula MRn where M is a metal having a +2 oxidation state and R is an organic ligand comprising a high electronegativity moiety, and n is an integer from 1 to 4;
- calcining the mixture to form a M-molecular sieve catalyst;
- and
- incorporating the M-molecular sieve catalyst with a refractory honeycomb to form the catalyst body.
A honeycomb article comprising a honeycomb structure including a zeolite and a compound of a formula MRn where M is a metal having a +2 oxidation state and R is an organic ligand comprising a high electronegativity moiety, and n is an integer from 1 to 4.
The honeycomb article of claim 19, wherein the refractory ceramic comprises cordierite.
A method of preparing a honeycomb catalyst article comprising:
- extruding a mixture comprising water, a molecular sieve, a compound of a formula MRn where M is a metal having a +2 oxidation state and R is an organic ligand comprising a high electronegativity moiety, and n is an integer from 1 to 4, and a refractory ceramic, to form a honeycomb green body;
- optionally drying the green body;
- and
- firing the green body.
Dependencies are inferred from the claim text.