Browse Publications Technical Papers 750093
1975-02-01

Hydrogen Sulfide Formation Over Automotive Oxidation Catalysts 750093

A number of laboratory and engine dynamometer studies were conducted to determine the effect of various catalyst and engine operating parameters on the formation of H2S over alumina-supported Pt and Pd catalysts.
These experiments indicate that H2S formation occurs at high temperatures under O2 deficient conditions. The fraction of exhaust gas SO2 converted to H2S was relatively constant for various fuel sulfur levels, and thus H2S formation decreases as fuel sulfur content decreases. Calculation of thermodynamic equilibria, as well as various experimental results, indicate that H2S formation is kinetically limited under the experimental conditions investigated.
Since the operating conditions that favor H2S formation (high catalyst temperature and O2 deficiency) do not normally occur in current oxidation catalytic emission control system operation, the formation of H2S over automotive oxidation catalysts is unlikely unless engine or system malfunctions occur.

SAE MOBILUS

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

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% 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

Advanced TWC Technologies Using CeO2/ZrO2 Solid Solutions

960798

View Details

TECHNICAL PAPER

The Chemistry and Control of H2S Emissions in Three-Way Catalysts

872162

View Details

TECHNICAL PAPER

Operating Characteristics of Zirconia Galvanic Cells (Lambda Sensors) in Automotive Closed-Loop Emission Control Systems

920289

View Details

X