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A kinetic study of ethanol steam reforming to produce hydrogen within the region of kinetic rate control was carried out. A Ni(II)-Al(III) lamellar double hydroxide as catalyst precursor was used. H 2 , CO, CO 2 and CH 4 were obtained as products. Using the Langmuir-Hinshelwood (L-H) approach, two kinetic models were proposed. The first was a general model including four reactions, two of them corresponding to ethanol steam reforming and the other two to methane steam reforming. When high temperatures and/or high water/ethanol feed ratios were used, the system could be reduced to two irreversible ethanol steam reforming reactions.

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The urea method is explored for a high-yield preparation of CuO-CeO 2 catalysts precursors. Solutions containing urea, Ce(NO 3 ) 3 , and Cu(NO 3 ) 2 were aged at 363 K for 5 h, achieving a quantitative coprecipitation in the form of amorphous Cu(II)-Ce(III) basic carbonates, with Cu(II) contents up to 40%. The mixed precursors were characterized by PXRD, SEM, EDS, FTIR, and TG. Upon mild thermal treatment under air atmosphere, i.e., T ) 723 K, powders were readily converted into CuO-promoted nanometric ceria. No Tenorite (CuO) segregation is observed after annealing at 873 K. The binary oxides were characterized by means of temperature-programmed reduction (TPR) and a test reaction for the preferential oxidation of carbon monoxide (CO-PROX), achieving the best performance with samples containing around 20% in copper atoms.