Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1997-01-08
1999-11-23
Niebling, John F.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502 66, 502338, 502339, 502345, B01J 2340
Patent
active
059900393
ABSTRACT:
A hydrocarbon-independent lean-burn NO.sub.x catalyst for treatment of products of combustion includes a porous support impregnated with two transition metals. The first transition metal has a stable upper oxidation state that is reducible to a lower oxidation state in the presence of carbon monoxide which is oxidized in the presence of the first transition metal to form carbon dioxide. The second transition metal has a stable lower oxidation state and is capable of being raised to a higher oxidation state in the presence of NO.sub.x which is reduced to nitrogen and oxygen in the presence of the second metal. The first and second metals cooperate to form a redox reaction system which regenerates the active form of the catalyst by raising the first metal to its stable oxidation state and reducing the second metal to it stable lower oxidation state by electron transfer between the first and second metals. The catalyst is based on transition metals which are less expensive than the noble metal-containing catalysts in current use.
REFERENCES:
patent: 4234455 (1980-11-01), Homeier et al.
patent: 4290916 (1981-09-01), Carlson
patent: 4388285 (1983-06-01), Rankel et al.
patent: 4751068 (1988-06-01), Bickar et al.
patent: 4970188 (1990-11-01), Steinbach et al.
patent: 4980335 (1990-12-01), Sugo et al.
patent: 5041270 (1991-08-01), Fujitani et al.
patent: 5057296 (1991-10-01), Beck
patent: 5098684 (1992-03-01), Kresge et al.
patent: 5102643 (1992-04-01), Kresge et al.
patent: 5108725 (1992-04-01), Beck et al.
patent: 5126297 (1992-06-01), Hardison et al.
patent: 5128302 (1992-07-01), Steinbach et al.
patent: 5164351 (1992-11-01), Steinbach et al.
patent: 5167942 (1992-12-01), Balkus et al.
patent: 5264203 (1993-11-01), Beck et al.
patent: 5362695 (1994-11-01), Beck et al.
J.S. Beck, J.C. Vartuli, W.J.Roth, M.E. Leonowicz, C.T. Kresge, K.D. Schmitt, C.T-W Chu, D.H. Olson, E.W. Sheppard, S.B. McCullen, J.B. Higgins and J.L. Schlenker; "A New Family of Mesoporous Molecular Sieves Prepared with Liquid Crystal Templates," Journal of the American Chemical Society; 1992, vol. 114, pp. 10834-10843. No month.
Paul Partha P
Schwab Stuart T
Ghyka Alexander G.
Niebling John F.
Southwest Research Institute
LandOfFree
Metal complex derived catalyst and method of forming does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Metal complex derived catalyst and method of forming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal complex derived catalyst and method of forming will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1221702