[Zurück]

A. Wolfbeisser, A. Horvath, K. Föttinger, J. Bernardi, G. Rupprechter:
"Methane Dry Reforming over zirconia supported Cu and Ni catalysts";
Poster: 15. Österreichische Chemietage 2013, TU-Graz, Graz, Österreich; 23.09.2013 - 26.09.2013; in: "GÖCH 15. Österreichische Chemietae 2013", (2013), S. 170.

Methane Dry Reforming (MDR) is a well suited reaction for the production of synthesis gas. Most group VIII metals show high activity for this reaction. Platinum catalysts are well characterized for MDR and known for their high activity and stability [1, 2]. Nevertheless, potential industrial application relies on Ni-based catalysts due to their low costs and high availability, even though Ni catalysts tend to form unreactive carbon which leads to catalyst deactivation [3, 4]. In this contribution we added small amounts of Pt to a Ni-ZrO2 catalyst with the aim of improved stability against coke formation.
Ni-ZrO2 catalysts were prepared by impregnation with 1 and 5 % w/w Ni. Pt-ZrO2 catalysts with 1 % w/w were synthesized by impregnation and by sol adsorption method. Bimetallic catalysts were obtained by simultaneous impregnation of ZrO2 with Pt:Ni 1:10 and 1:100 ratio with a total metal weight percentage of 5 % w/w.
Characterization techniques used include IR of adsorbed CO as a probe molecule, transmission electron microscopy (TEM), X-Ray diffraction (XRD), H2 chemisorption, and temperature programmed reaction (TPReaction), oxidation (TPO) and reduction (TPRed). But even though a high activity in terms of CO and H2 production could be observed over more than 4 hours, the formation of carbon species on the catalyst was obvious in the TEM micrographs. By addition of Pt to the Ni-ZrO2 catalyst the catalytic activity could be increased and the amount of coke formation decreased significantly.
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