Effects of Support and Rh Additive on Co-Based Catalysts in the Ethanol Steam Reforming Reaction

• DOI: 10.1021/cs500045z
• Publication Date: 2014-03-11T20:39:44Z
• Authors: Zs. Ferencz; A. Erdőhelyi; K. Baán; A. Oszkó; L. Óvári; Z. Kónya; C. Papp; H.-P. Steinrück; J. Kiss
• Keywords: Temperature-programmed reduction; Water-gas shift reaction

The effect of the nature support and promotion achieved by a Rh additive on Co-based catalysts in ethanol steam reforming reaction were studied. with 2% Co loading characterized temperature-programmed reduction (TPR) X-ray photoelectron spectroscopy (XPS). In situ diffuse reflectance Fourier-transform infrared (DRIFTS) identified surface intermediates formed during reaction, whereas gas phase products detected chromatography (GC). Upon heating hydrogen to 773 K, cobalt could not be reduced Co0 alumina, but silica was almost complete. On ceria, half metallic state. By presence small amount (0.1%) promoter, both ceria greatly enhanced. For acidic Al2O3 support, dehydration mechanism dominant, although basic CeO2 significant also formed. Addition as promoter Co/CeO2 catalyst resulted further increase selectivity.