Preparation and use of Pt/zeolite catalyst materials for removing carbon monoxide

US5955395A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Renato Andorf · Meckenbeuren, DE
• Werner Maunz · Markdorf, DE
• Carsten Plog · Markdorf, DE
• Thomas Stengel · Friedrichshafen, DE

Key dates

• Filing date: Feb 21, 1997
• Grant date: Sep 21, 1999
• Expiry date: Feb 21, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing a Pt/zeolite catalyst material, the material itself, and the use of the material in removing carbon monoxide from a gas. In a preferred embodiment, the invention relates to a process for preparing a Pt/zeolite catalyst material for the catalytic removal of CO in H.sub.2 -rich gas by means of selective CO oxidation and the use of such a catalyst material. The catalyst materials of the invention can be prepared by employing Pt(NH.sub.3).sub.4 Cl.sub.2.H.sub.2 O and a zeolite material. The resulting material can be used for the catalytic removal of CO from an H.sub.2 -rich outlet gas mixture from a methanol reforming reactor. The compositions and methods to produce catalytic materials result in products with high and prolonged catalyst activity. In particular, the methods and compositions of the invention can be used in removing CO from the hydrogen fed to fuel cells in electric vehicles having stored methanol fuel.