Effect of WO 3 and La 2 O 3 Addition on the Thermal Durability of Pd/γ - Al 2 O 3 Catalysts for Automotive Emission Control

Paper #:
  • 912602

Published:
  • 1991-11-01
Pages:
5
Abstract:
In order to suggest an efficient catalyst system for automotive emission control, Pd-WO3 and Pd-La2O3 catalysts were characterized before and after simulated thermal aging and phosphorous contact. From the results of H2 chemisorption experiment, it was found that the particle size of Pd was decreased and the dispersion of metal was increased by the promotion of La2O3, which results in the enhancement of thermal durability. Also it was found that deactivation of Pd-WO3 involves severe metal vaporization during thermal aging. By engine exhaust gas test, it was observed that Pd-La2O3 catalyst was sensitive against phosphorous poisoning up to certain value of phosphorous accumulation while it has exceptional thermal stability.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2010-09-28
Training / Education
2017-05-04
Standard
1987-02-01
Training / Education
2017-10-31
Training / Education
2017-10-23