The Influence of Oxidation Catalysts on NO2 in Diesel Exhaust

1993 ◽  
Author(s):  
Jeffrey L. Ambs ◽  
B. Thompson McClure
Keyword(s):  
Diesel Exhaust ◽  
Oxidation Catalysts

scholarly journals Improved Hydrothermal Stability in Glass Diesel Soot Oxidation Catalysts

Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 684 ◽  
Author(s):  
James Zokoe ◽  
Xiaoxiang Feng ◽  
Changsheng Su ◽  
Paul J. McGinn
Keyword(s):  
Diesel Exhaust ◽  
Soot Oxidation ◽  
Diesel Soot ◽  
Hydrothermal Stability ◽  
Free Energies ◽  
Oxidation Catalysts ◽  
Diesel Soot Oxidation ◽  
Hydrothermal Environment ◽  
Field Strengths ◽  
Soot Oxidation Catalysts

The hydrothermal stability of K-Ca-Si-O glass soot oxidation catalysts has been improved by substitution of Ce and Zr for Ca. This work demonstrates that glasses can be tailored to withstand the challenging diesel exhaust hydrothermal environment by considering the field strengths and partial molar free energies of the hydration reactions (ΔGi) of the cation species in the glass. The result is a glass that shows less formation of precipitates after 2 h hydrothermal exposure in air with 7% H2O at temperatures ranging from 300–700 °C. A K-Ca-Si-O glass with a soot T50 (the temperature when 50% of the soot is oxidized) of 394 °C was found to degrade to 468 °C after a 2 h, 700 °C hydrothermal exposure, whereas the improved K-Ce-Zr-Si-O glass only changed from 407 °C to 427 °C after the same treatment.

The Effect of Pt-Pd Ratio on Oxidation Catalysts Under Simulated Diesel Exhaust

2011 ◽  
Author(s):  
Chang Hwan Kim ◽  
Michelle Schmid ◽  
Steven J. Schmieg ◽  
Julian Tan ◽  
Wei Li
Keyword(s):  
Diesel Exhaust ◽  
Oxidation Catalysts
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