Improved catalyst materials and emission control systems. CRADA final report for CRADA Number ORNL 92-0115

Technical Report · Sun Sep 01 04:00:00 EDT 1996

DOI:https://doi.org/10.2172/432897· OSTI ID:432897

Kenik, E A; More, K L; Domingo, N; Storey, J M ^[1]; LaBarge, W; Beckmeyer, R F; Theis, J R ^[2]

---

1. Oak Ridge National Lab., TN (United States)
2. Delphi Automotive Systems, Flint, MI (United States)

The overall goal of this CRADA was the improvement of performance and/or development of alternate systems for conventional fuel, flex-fuel, and alternate fuel vehicles in order to meet stringent future emission standards. The objectives had three major thrusts: (1) the characterization of the structural and chemical evolution of the precious metals and washcoat during aging under bench flow reactor, engine dynamometer, and vehicle conditions; (2) the correlation of measured catalyst performance and degradation over time with details of microstructural changes under bench flow reactor and engine dynamometer conditions; and (3) the simulation and testing of an in-cylinder catalyst system to determine the effect on emissions of a single-cylinder engine. Catalyst formulations for both gasoline and natural gas applications were studied. The emission testing and structural characterization were performed on alternate formulations and processing variables in order to evaluate the relative conversion efficiency, lifetime, and stability. The aging parameters were correlated with the evolving structure and properties of the tested catalytic converters. A major portion of the second thrust area was the construction and validation of both the bench flow reactor and engine dynamometer test facility and the identification of deactivation/regeneration mechanisms associated with alternative fuels relative to those for conventional fuel. A number of microstructural changes were identified that could contribute to the deactivation of the catalyst during aging. The stability of several catalyst formulations and alternate processing procedures relative to these microstructural changes and changes in conversion efficiency and lifetime were studied.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 432897
• Report Number(s): ORNL/M--5818; ON: DE97002945; CRN: C/ORNL--92-0115
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AIR POLLUTION CONTROL
ALUMINIUM OXIDES
AUTOMOBILES
CATALYSTS
CATALYTIC CONVERTERS
CERIUM OXIDES
GASOLINE
MATERIALS TESTING
MORPHOLOGICAL CHANGES
NATURAL GAS
PALLADIUM
PLATINUM
PROGRESS REPORT
RHODIUM
SERVICE LIFE