Abstract
The objective of this work is the investigation of the catalytic combustion process of oxylene vapors in a porous pellet of 0.5% wt Pt/alumina catalyst, under conditions similar to those used for de-pollution applications. Uniform and non-uniform Pt distributions in the grain volume were analyzed and compared. Platinum utilization efficiency was expressed through the internal effectiveness factor and to o-xylene conversion. Calculations have shown that, for o-xylene vapors concentrations similar to the ones used in decontamination applications, among the physical phenomena, internal diffusion presents the most important influence on the process kinetics. Also, important effects on the overall process kinetics could present the external concentration and temperature gradients, especially for Pt non-uniform distributions. Moreover, the calculation evidenced a negligible internal temperature gradient and confirmed the principle stating that the maximum efficiency is obtained when Pt is placed in a narrow zone in the proximity of the external surface of the porous pellet.
| Original language | French |
|---|---|
| Pages (from-to) | 47-60 |
| Number of pages | 14 |
| Journal | UPB Scientific Bulletin, Series B: Chemistry and Materials Science |
| Volume | 74 |
| Issue number | 4 |
| Publication status | Published - 2012 |
| Externally published | Yes |
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Keywords
- Combustion catalytique
- Dépollution
- Distribution spatiale du catalyseur
- O-xylène
- Pt/alumine
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
Cite this
Simulation du procede de depollution par combustion catalytique au niveau du grain de catalyseur poreux. / Manta, Corina Mihaela; Bozga, Grigore; Bîldea, Costin Sorin.
In: UPB Scientific Bulletin, Series B: Chemistry and Materials Science, Vol. 74, No. 4, 2012, p. 47-60.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simulation du procede de depollution par combustion catalytique au niveau du grain de catalyseur poreux
AU - Manta, Corina Mihaela
AU - Bozga, Grigore
AU - Bîldea, Costin Sorin
PY - 2012
Y1 - 2012
N2 - The objective of this work is the investigation of the catalytic combustion process of oxylene vapors in a porous pellet of 0.5% wt Pt/alumina catalyst, under conditions similar to those used for de-pollution applications. Uniform and non-uniform Pt distributions in the grain volume were analyzed and compared. Platinum utilization efficiency was expressed through the internal effectiveness factor and to o-xylene conversion. Calculations have shown that, for o-xylene vapors concentrations similar to the ones used in decontamination applications, among the physical phenomena, internal diffusion presents the most important influence on the process kinetics. Also, important effects on the overall process kinetics could present the external concentration and temperature gradients, especially for Pt non-uniform distributions. Moreover, the calculation evidenced a negligible internal temperature gradient and confirmed the principle stating that the maximum efficiency is obtained when Pt is placed in a narrow zone in the proximity of the external surface of the porous pellet.
AB - The objective of this work is the investigation of the catalytic combustion process of oxylene vapors in a porous pellet of 0.5% wt Pt/alumina catalyst, under conditions similar to those used for de-pollution applications. Uniform and non-uniform Pt distributions in the grain volume were analyzed and compared. Platinum utilization efficiency was expressed through the internal effectiveness factor and to o-xylene conversion. Calculations have shown that, for o-xylene vapors concentrations similar to the ones used in decontamination applications, among the physical phenomena, internal diffusion presents the most important influence on the process kinetics. Also, important effects on the overall process kinetics could present the external concentration and temperature gradients, especially for Pt non-uniform distributions. Moreover, the calculation evidenced a negligible internal temperature gradient and confirmed the principle stating that the maximum efficiency is obtained when Pt is placed in a narrow zone in the proximity of the external surface of the porous pellet.
KW - Combustion catalytique
KW - Dépollution
KW - Distribution spatiale du catalyseur
KW - O-xylène
KW - Pt/alumine
UR - http://www.scopus.com/inward/record.url?scp=84903596869&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84903596869&partnerID=8YFLogxK
M3 - Article
VL - 74
SP - 47
EP - 60
JO - UPB Scientific Bulletin, Series B: Chemistry and Materials Science
JF - UPB Scientific Bulletin, Series B: Chemistry and Materials Science
SN - 1454-2331
IS - 4
ER -