Utilization of Advanced Three-Way Catalyst Formulations on Ceramic Ultra Thin Wall Substrates for Future Legislation

Schmidt, J.; Franz, J.; Merdes, Norbert; Brady, Michael; Mueller, W.; Lindner, D.; Bog, T.; Clark, D. W.; Buckel, Thomas G.; Stoepler, W.; Henninger, R.J.; Ermer, H.; Abe, F.; Makino, Mikio; Kunz, Allison; Vogt, Claus

doi:10.4271/2002-01-0349

Cited by 10 publications

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Monolithic catalyst carriers are made of ceramic materials or metals with cell densities from 200 to 1200 cpsi (1 cell per square inch ≙ 1550 cells per m 2 ). The most commonly used cell density for substrates of gasoline and diesel driven vehicles lies between 300-400 cpsi, with a clear trend towards higher cell densities, which provide an increase in the geometric surface area, as noted in [30][31][32]. Besides the cell density of the monolith, wall thickness also deserves attention as it significantly determines the thermal mass of the substrate and shortens the time for catalyst light-off.…”

Section: Ceramic Catalyst Substratesmentioning

confidence: 99%

Heat-Up Performance of Catalyst Carriers—A Parameter Study and Thermodynamic Analysis

et al. 2021

View full text Add to dashboard Cite

This study investigates geometric parameters of commercially available or recently published models of catalyst substrates for passenger vehicles and provides a numerical evaluation of their influence on heat-up behavior. Parameters considered to have a significant impact on the thermal economy of a monolith are: internal surface area, heat transfer coefficient, and mass of the converter, as well as its heat capacity. During simulation experiments, it could be determined that the primary role is played by the mass of the monolith and its internal surface area, while the heat transfer coefficient only has a secondary role. Furthermore, an optimization loop was implemented, whereby the internal surface area of a commonly used substrate was chosen as a reference. The lengths of the thin wall and high cell density monoliths investigated were adapted consecutively to obtain the reference internal surface area. The results obtained by this optimization process contribute to improving the heat-up performance while simultaneously reducing the valuable installation space required.

show abstract

Section: Ceramic Catalyst Substratesmentioning

confidence: 99%