Regis Vonarb

Regis Vonarb
École d'ingénieurs et d'architectes de Fribourg

About

9
Publications
2,151
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63
Citations
Citations since 2016
1 Research Item
28 Citations
201620172018201920202021202201234567
201620172018201920202021202201234567
201620172018201920202021202201234567
201620172018201920202021202201234567

Publications

Publications (9)
Article
Full-text available
The aim of this work is to quantify to what extent the presence of calcium, zinc and/or phosphorus, in realistic concentrations, affects the efficiency of a commercial full body type SCR V catalyst used for off-road vehicles. Samples containing Ca, Zn and P, and combinations thereof, were prepared by incipient wetness impregnation of the catalyst....
Conference Paper
Full-text available
The aim of the study is to evaluate the possible vanadium emissions from different commercially available vanadium-based SCR monoliths. The vanadium sublimation was studied at laboratory scale using a monolith sample (16 mm diameter × 19 mm long). Vanadia vapors were disposed on an alumina bed placed downstream the catalyst sample, in the hot zone...
Conference Paper
Full-text available
We present an experimental and modelling methodology developed at LGRE research laboratory to characterize soot oxidation in the presence of different atmospheres (NO2, NO2/O2), simulating passive regeneration which occur in a Diesel Particulate Filter (DPF). Based on this methodology which aims at deriving the kinetic parameters for soot combustio...
Article
Full-text available
The aim of the study is to evaluate the possible vanadium emissions from different commercially available vanadium-based SCR monoliths. The vanadium sublimation was studied at laboratory scale using a monolith sample (16 mm diameter × 19 mm long). Vanadia vapors were disposed on an alumina bed placed downstream the catalyst sample, in the hot zone...
Article
Full-text available
We present an experimental and modelling methodology developed at LGRE research laboratory to characterize soot oxidation in the presence of different atmospheres (NO 2 , NO 2 /O 2), simulating passive regeneration which occur in a Diesel Particulate Filter (DPF). Based on this methodology which aims at deriving the kinetic parameters for soot comb...
Article
Two diesel soots formed in a engine/exhaust line by using a fuel that contained 350 ppm (by weight) of sulfur with and without a cerium-based additive (diesel soots denoted Cec-DS and nc-DS, respectively) are studied (i) via temperature-programmed experiments in the temperature range of 300−1300 K and (ii) adsorption of O2, CO, and CO2 at several a...
Article
The present study concerns the characterization (by magnetic susceptibility measurements and temperature-programmed desorption (TPD) experiments) of the cerium fraction of a diesel soot (denoted Cec-DS) collected in the exhaust line of an engine using a fuel containing 50 ppm of cerium additive and 350 ppm of sulfur. The impact of this cerium fract...

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