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Methanol steam reforming promoted by molten salt-modified platinum on alumina catalysts.

Kusche M, Agel F, Ní Bhriain N, Kaftan A, Laurin M, Libuda J, Wasserscheid P - ChemSusChem (2014)

Bottom Line: During reaction, a partly liquid film of alkali hydroxides/carbonates forms on the catalyst/alumina surface, thus significantly enhancing the availability of water at the catalytically active sites.Too high catalyst pore fillings with salt introduce a considerable mass transfer barrier into the system as indicated by kinetic studies.Thus, the optimum interplay between beneficial catalyst modification and detrimental mass transfer effects had to be identified and was found on the applied platinum-on-alumina catalyst at KOH loadings around 7.5 mass%.

View Article: PubMed Central - PubMed

Affiliation: Lehrstuhl für Chemische Reaktionstechnik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen (Germany), Fax: (+49) 9131-8527421 www.crt.cbi.uni-erlangen.de.

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Dispersions measured by CO chemisorption for Pt/Al2O3 catalysts coated with different loadings of K[OAc] (▪), KOH [ratio 0.8 (◊) and 1 (▵)], and K2CO3 (•).
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fig05: Dispersions measured by CO chemisorption for Pt/Al2O3 catalysts coated with different loadings of K[OAc] (▪), KOH [ratio 0.8 (◊) and 1 (▵)], and K2CO3 (•).

Mentions: All CO chemisorption experiments were carried out by performing CO pulse chemisorption at 40 °C. The catalyst dispersions resulting from surface coating with K[OAc], KOH, and K2CO3 were investigated (Figure 5).


Methanol steam reforming promoted by molten salt-modified platinum on alumina catalysts.

Kusche M, Agel F, Ní Bhriain N, Kaftan A, Laurin M, Libuda J, Wasserscheid P - ChemSusChem (2014)

Dispersions measured by CO chemisorption for Pt/Al2O3 catalysts coated with different loadings of K[OAc] (▪), KOH [ratio 0.8 (◊) and 1 (▵)], and K2CO3 (•).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4641462&req=5

fig05: Dispersions measured by CO chemisorption for Pt/Al2O3 catalysts coated with different loadings of K[OAc] (▪), KOH [ratio 0.8 (◊) and 1 (▵)], and K2CO3 (•).
Mentions: All CO chemisorption experiments were carried out by performing CO pulse chemisorption at 40 °C. The catalyst dispersions resulting from surface coating with K[OAc], KOH, and K2CO3 were investigated (Figure 5).

Bottom Line: During reaction, a partly liquid film of alkali hydroxides/carbonates forms on the catalyst/alumina surface, thus significantly enhancing the availability of water at the catalytically active sites.Too high catalyst pore fillings with salt introduce a considerable mass transfer barrier into the system as indicated by kinetic studies.Thus, the optimum interplay between beneficial catalyst modification and detrimental mass transfer effects had to be identified and was found on the applied platinum-on-alumina catalyst at KOH loadings around 7.5 mass%.

View Article: PubMed Central - PubMed

Affiliation: Lehrstuhl für Chemische Reaktionstechnik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen (Germany), Fax: (+49) 9131-8527421 www.crt.cbi.uni-erlangen.de.

Show MeSH
Related in: MedlinePlus