Browse Publications Technical Papers 2002-01-1093
2002-03-04

The Effects of Oil-Derived Poisons on Three-Way Catalyst Performance 2002-01-1093

Two major deactivation mechanisms of automotive catalysts during road usage are:
  1. 1.
    thermal aging
  2. 2.
    poison accumulation of oil-derived poisons such as zinc and phosphorus.
A dynamometer-based aging cycle, incorporating a high-temperature low-poison mode to account for thermal aging followed by a low-temperature high-poison mode to account for poison accumulation, has been developed to allow the examination of catalyst formulations after exposure to both a harsh thermal and chemical aging environment. This type of aging cycle results in dynamometer-aged catalysts that are physically much more similar to road-aged catalysts than thermally-based dynamometer cycles. Using this aging-cycle, Pd-only, Pd-Rh and Pt-Rh light-off catalysts were examined. The Pd-Rh catalyst gave the best overall performance, with equivalent HC light-off performance to the Pd-only catalyst and equivalent NOx performance to the Pt-Rh catalyst.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

How Modern Engine Oils can impact on Emission Reduction

2003-01-1989

View Details

JOURNAL ARTICLE

The Effects of Sulfur Poisoning and Desulfation Temperature on the NOx Conversion of LNT+SCR Systems for Diesel Applications

2010-01-0300

View Details

TECHNICAL PAPER

Extruded Zeolite Based Honeycomb Catalyst for NOx Removal from Diesel Exhaust

2008-01-1024

View Details

X