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Nickel catalyst with outstanding activity in the DRM reaction prepared by high temperature calcination treatment
Authors: Smoláková Lucie | Kout Martin | Čapek Libor | Rodriguez-Gomez Alberto | Gonzalez-Delacruz Victor M. | Hromádko Luděk | Caballero Alfonso
Year: 2016
Type of publication: článek v odborném periodiku
Name of source: International Journal of Hydrogen Energy
Publisher name: Pergamon-Elsevier Science Ltd.
Place: Oxford
Page from-to: 8459-8469
Titles:
Language Name Abstract Keywords
cze katalyzátor na bázi niklu s vynikající aktivitou v DRM reakci připravený pomocí vysokoteplotní kalcinace Katalytické systémy Ni-Ce/Al2O3 (11 wt.% Ni and 3 wt.% Ce) byly testovány za různých kalcinačních a redukčních podmínek. Bylo zjištěno, že redukovaný Ni-Ce/Al2O3 je více aktivní a stabilní v DRM reakci než odpovídající neredukovaný katalyzátor. Ni-Ce/Al2O3; interakce; DRM; Methane
eng Nickel catalyst with outstanding activity in the DRM reaction prepared by high temperature calcination treatment The catalytic performance of some Ni-Ce/Al2O3 catalytic systems (11 wt.% Ni and 3 wt.% Ce) were checked after being submitted to different calcination and reduction treatments. It was found that, the reduced Ni-Ce/Al2O3 catalysts were more active and stable in the dry reforming reaction of methane than the corresponding not-reduced catalysts. This high activity was initially connected with the smaller size of pre-reduced Ni species, which at the same time leads on to the formation of filamentous carbon. The best overall performance was obtained for the reduced catalyst after being calcined at 1000 degrees C. This catalyst presents a very high stability, a low level of carbon formation, maintaining the nickel particle size constant during reaction. Surprisingly, although its reduction degree is only 12% at 750 degrees C, its catalytic activity is similar to the full reduced catalysts. So, the small number of reduced metallic particles of this catalyst shows a very high activity, much higher than the other catalysts. Ni-Ce/Al2O3; Metal-support interaction; Dry reforming; Methane

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