Catalysts for lean burn engines

US8323601B2 · kind B2 · utility

Assignees

• Catalytic Solutions, Inc. · US
• ECS Partners Limited · US

Inventors

• Rachelle Justice · Ventura, US
• Rajashekharam Malyala · Camarillo, US
• Svetlana Iretskaya · Bad Honnef, DE
• Dylan Trandal · Ventura, US
• Dien To · Dallas, US
• Jason Pless · Ventura, US
• Stephen J. Golden · Lompoc, US
• Jiho Yoo · Irvine, US

Key dates

• Filing date: May 20, 2010
• Grant date: Dec 4, 2012
• Expiry date: Jun 19, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N2370/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Embodiments of the present disclosure include a catalyst for the conversion of CO and/or hydrocarbons in an exhaust stream including a Sn compound selected from the group consisting of a binary composition comprising Sn and Ti, a ternary composition comprising Sn, Ti and Zr, and mixtures of any thereof. In those embodiments, the binary composition may include Sn(X)Ti(y)O2, wherein x+y=1, 0.85>y>0. In other embodiments of the present disclosure, the Sn compound includes a ternary composition including Sn(a)Ti(b)Zr(c)O2, wherein a is 0.25, b is 0.25 and c is 0.5. Certain embodiments of this disclosure include a method for the conversion of CO in an exhaust stream, including contacting an exhaust stream containing CO with the catalyst described above containing a Sn compound. In other embodiments, the exhaust stream includes hydrocarbons.