Study of NOx Trap Reaction by Thermodynamic Calculation N.E. Chemcat Corporation

Format:

Conference/Event

Author/Creator:

Kobayashi, Takeshi, author.

Conference Name:

International Congress & Exposition (1997-02-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1997

Summary:

The reaction mechanism in a NOx-trap type catalyst for a partial lean burn engine is discussed using a thermodynamic calculation approach. The thermodynamic calculation and catalyst characterization suggest the following reaction mechanism;Thermodynamic calculation further suggested that NOx trap performance depended on the basicity of added NOx trap material, and evaluation results of the performance in Pt/Rh type catalyst supported this tendency.Furthermore, impacts of catalyst formulations and reaction parameters on NOx trap performance were investigated for identification of the NOx trap reaction mechanism. Investigations assumed that NOx trap performance of the catalyst was dominated by the reaction equilibrium in NOx trap process.As a result, the reaction mechanism required the catalyst to have: 1) effective NO2 formation, 2) strong basicity in NOx trap material, and 3) efficient use of trap material. On the basis of these findings, an advanced NOx trap catalyst has been developed

Notes:

Vendor supplied data

Publisher Number:

970745

Access Restriction:

Restricted for use by site license