CuO/ZnO catalysts for methanol steam reforming: The role of the support polarity ratio and surface area
Author/s
Mateos-Pedrero, Cecilia; Silva, Hugo; Pacheco Tanaka, David A.; Ligouri, Simona; Iulianelli, Adolfo; [et al.]Date
2015-09Keywords
CuO/ZnO catalysts
Methanol steam reforming
Pd membrane
Abstract
The effect of surface area and polarity ratio of ZnO support on the catalytic properties of
CuO/ZnO catalyst for methanol steam reforming (MSR) are studied. The surface area of ZnO
was varied changing the calcination temperature and its polarity ratio was modified using
different Zn precursors, zinc acetate and zinc nitrate. It was found that the copper dispersion and
copper surface area increase with the surface area of the ZnO support and the polarity ratio of
ZnO strongly influences the reducibility of copper species. A higher polarity ratio promotes the
reducibility, which is attributed to a strong interaction between copper and the more polar ZnO
support. Interestingly, it was observed that the selectivity of CuO/ZnO catalysts (lower CO
yield) increases with the polarity ratio of ZnO carriers. As another key result, CuO/ZnOAc375
catalyst has proven to be more selective (up to 90 %) than a reference CuO/ZnO/Al2O3 sample
(G66-MR, Süd Chemie).
The activity of the best ...
Type
article