Ni-based catalysts obtained from perovskites oxides for ethanol steam reforming |
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Authors: | Fabiola Nerina Agüero Jose Antonio Alonso Maria Teresa Fernández-Díaz Luis Eduardo Cadus |
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Institution: | 1. Instituto de Investigaciones en Tecnología Química(INTEQUI), UNSL-CONICET, Almirante Brown 1455, 5700 San Luis, Argentina;
2. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco, 28049 Madrid, Spain;
3. Institut Laue-Langevin, B. P. 156, F-38042 Grenoble Cedex 9, France |
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Abstract: | Perovskites as host structures of cations were used in order to generate in situ active and stable catalysts for ethanol steam reforming. For this purpose, La1-xMgxAl1-yNiyO3 (x = 0.1; y= 0, 0.1, 0.2, 0.3) perovskites were synthetized by the citrate method. Ni segregation is evident for a substitution level higher than 0.2. The segregation of Ni as NiO generated species interacts with different metal-support after the reduction step. The y= 0.1 catalyst presents the highest H2 yield value about 85% during reaction time, with low mean values of CH4 and CO selectivities of 3.4% and 11%, respectively and a low carbon formation. The better performance of y= 0.1 catalyst could be attributed to the minor proportion of segregated phases, thus a controlled expulsion of Ni is successfully reached. |
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Keywords: | perovskites catalyst design ethanol steam reforming |
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