Development of a Methodology to Separate Thermal from Oil Aging of a Catalyst Using a Gasoline-Fueled Burner System Southwest Research Institute

Format:

Book

Conference/Event

Author/Creator:

Webb, Cynthia C., author.

Conference Name:

SAE 2003 World Congress & Exhibition (2003-03-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

Typically, an engine/dynamometer thermal aging cycle contains combinations of elevated catalyst inlet temperatures, chemical reaction-induced thermal excursions (simulating misfire events), and average air/fuel ratio's (AFR's) to create a condition that accelerates the aging of the test part. In theory, thermal aging is predominantly a function of the time at an exposure temperature. Therefore, if a burner system can be used to simulate the exhaust AFR and catalyst inlet and bed temperature profile generated by an engine running an accelerated aging cycle, then a catalyst should thermally age the same when exposed to either exhaust stream.This paper describes the results of a study that examined the aging difference between six like catalysts aged using the Rapid Aging Test (RAT) cycle (an accelerated thermal aging cycle). Three catalysts were aged using a gasoline-fueled engine aging stand; the other three were aged using a computer controlled burner system. Both systems were programmed to run aging cycles that provided the same inlet temperature and AFR profiles, and space velocity conditions. Each catalyst was evaluated using a vehicle over the FTP emissions test cycle and an AFR sweep test suing an engine test stand before and after aging. Finally, the catalysts were cored and analyzed to provide a composition and surface area comparison

Notes:

Vendor supplied data

Publisher Number:

2003-01-0663

Access Restriction:

Restricted for use by site license