Details

Autor(en) / Beteiligte

• Kang, Sung Bong
• Nam, In-Sik
• Cho, Byong K.
• Kim, Chang Hwan
• Oh, Se H.

Titel

Universal activity function for predicting performance of Pd-based TWC as function of Pd loading and catalyst mileage

Ist Teil von

• Chemical engineering journal (Lausanne, Switzerland : 1996), 2015-01, Vol.259, p.519-533

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2015

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• [Display omitted] •A 3D activity function based upon Pd MSA was developed with Pd loading and mileage.•Primary kinetics combined with activity function well predicted TWC performances.•The activity function was universally applicable to any Pd-based TWC.•The activity function may be utilized to estimate life expectancy of field-aged TWCs. A 3-D activity function has been developed on the basis of the active metallic surface area (Pd MSA) in terms of the Pd loading and mileage of the catalyst, which can be used to predict the performance of Pd-based commercial TWCs over a wide range of the Pd loadings from 20 to 280g/ft3 and the catalyst mileages from 4k to 100k miles. The overall reaction kinetics combined with the activity function and the detailed reaction kinetics reasonably well describes the TWC activity of the powder-type TWC as a function of the catalyst Pd loading and mileage. Moreover, the capability of the activity function incorporated into a 2D non-isothermal monolith reactor model including both the heat and mass balance equations has also been demonstrated with reasonable accuracy of its prediction of the TWC performance of a commercial monolith reactor over its mileage from 4k to 100k miles, providing that the activity function developed in this work may be universally utilized to predict the catalytic activity of any Pd-based TWC with respect to its Pd loading and mileage.