Exhaust gas purifying catalyst

Details Exhaust gas purifying catalyst Exhaust gas purifying catalyst

2011-07-19

2011-07-19

Silverman, Stanley (Department: 1736)

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

Catalyst or precursor therefor

Silicon containing or process of making

C502S302000, C502S303000, C502S304000, C502S325000, C502S326000, C502S327000, C502S328000, C502S330000, C502S332000, C502S340000, C502S341000, C502S344000, C502S346000

Reexamination Certificate

active

07981829

ABSTRACT:
An exhaust gas purifying catalyst includes: a composite oxide represented by: (Aa-w-xMwM′x) (Si6-yNy)O27-z. A is a cation of at least one of La and Pr; M is a cation of at least one of Ba, Ca, and Sr; M′ is a cation of at least one of Nd, Y, Al, Pr, Ce, Sr, Li, and Ca; N is a cation of at least one of Fe, Cu, and Al. The following are satisfied: 6≦a≦10, 0<w<5, 0≦x<5, 0<w+x≦5, 0≦y≦3, 0≦z≦3, A≠M′, and x≠0 when A is a cation of La. A noble metal ingredient which forms a solid solution with the composite oxide or is supported on the composite oxide, and an exhaust gas purifying catalyst product formed of a carrier made of a ceramic or metallic material, and a layer of the exhaust gas purifying catalyst supported on the carrier.

REFERENCES:
patent: 06-055075 (1994-03-01), None
patent: 11-197507 (1999-07-01), None
patent: 2007-144412 (2007-06-01), None
patent: 2007-144412 (2007-08-01), None
Sumio Kato, Takuya Yoshizawa, Nobuhiro Kakuta, Shinya Akiyama, Masataka Obasawara, Takashi Wakabayashi, Yuunosuke Nakahara and Shinichi Nakata, “Preparation of apatite-type-silicate-supported precious metal catalysts for selective catalytic reduction of NOx” Res. Chem. Intermed. vol. 34, Nos. 8-9 (2008), pp. 703-708.
Emma Kendrick, M. Saiful Islam, and Peter R. Slater, “Developing apatites for solid oxide fuel cells: insight into structural, transport and doping properties,” Journal of Materials Chemistry, 17 (2007), pp. 3104-3111.
Susumu Nakayama and Masatomi Sakamoto, “Electrical Properties of New Type High Oxide Ionic Conductor RE10Si6O27,” Journal of the European Ceramic Society 18 (1998), p. 1413-1418.
A.A. Yaremchenko, A.L. Shaula, V.V. Kharton, J.C. Waerenborgh, D.P. Rojas, M.V. Patrakeev, F.M.B. Marques, “Ionic and electronic conductivity of La9.83-xPrxSi4.5Fe1.5O26d apatites” Solid State Ionics 171 (2004), pp. 51-59.
P.R. Slater, J.E.H. Sansom, J.R. Tolchard, “Development of Apatite-Type Oxide Ion Conductors,” The Chemical Record, vol. 4 (2004), pp. 373-384.
J. E. H. Sansom, E. Kendrick, J. R. Tolchard, M. S. Islam, P. R. Slater, “A comparison of the effect of rare earth vs Si site doping on the conductivities of apatite-type rare earth silicates,” J Solid State Electrochem 10 (2006), pp. 562-568.

Affiliated with

Also associated with

Rating

Exhaust gas purifying catalyst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exhaust gas purifying catalyst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust gas purifying catalyst will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2726851