Methanol Steam Reforming Promoted by Molten Salt-Modified Platinum on Alumina Catalysts

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Details zur Publikation

Autor(en): Kusche M, Agel F, Ní Bhriain N, Kaftan A, Laurin M, Libuda J, Wasserscheid P
Zeitschrift: Chemsuschem
Verlag: Wiley-VCH Verlag
Jahr der Veröffentlichung: 2014
Band: 7
Seitenbereich: 2516-2526
ISSN: 1864-5631


Abstract


We herein describe a straight forward procedure to increase the performance of platinum-on-alumina catalysts in methanol steam reforming by applying an alkali hydroxide coating according to the "solid catalyst with ionic liquid layer" (SCILL) approach. We demonstrate by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and temperature-programmed desorption (TPD) studies that potassium doping plays an important role in the catalyst activation. Moreover, the hygroscopic nature and the basicity of the salt modification contribute to the considerable enhancement in catalytic performance. 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%.



FAU-Autoren / FAU-Herausgeber

Agel, Friederike Dr.
Lehrstuhl für Chemische Reaktionstechnik
Kaftan, Andre
Lehrstuhl für Physikalische Chemie II
Kusche, Matthias
Lehrstuhl für Chemische Reaktionstechnik
Laurin, Mathias Dr.
Lehrstuhl für Physikalische Chemie II
Libuda, Jörg Prof. Dr.
Professur für Physikalische Chemie
Ní Bhriain, Nollaig
Lehrstuhl für Chemische Reaktionstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik


Zitierweisen

APA:
Kusche, M., Agel, F., Ní Bhriain, N., Kaftan, A., Laurin, M., Libuda, J., & Wasserscheid, P. (2014). Methanol Steam Reforming Promoted by Molten Salt-Modified Platinum on Alumina Catalysts. Chemsuschem, 7, 2516-2526. https://dx.doi.org/10.1002/cssc.201402357

MLA:
Kusche, Matthias, et al. "Methanol Steam Reforming Promoted by Molten Salt-Modified Platinum on Alumina Catalysts." Chemsuschem 7 (2014): 2516-2526.

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Zuletzt aktualisiert 2018-08-08 um 03:52