Analysis alloy quasicrystalline Al62,2 Cu25,3 Fe12,5 for steam reforming of methanol
| Autor: | Lourdes Cristina Lucena Agostinho Jamshidi, Luciano Nascimento, Celmy Maria B. de Menezes Barbosa, Reza Jamshidi Rodbari |
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| Jazyk: | English<br />Portuguese |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Semina: Ciências Exatas e Tecnológicas, Vol 36, Iss 2, Pp 3-16 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1679-0375 1676-5451 |
| DOI: | 10.5433/1679-0375.2015v36n2p3-16 |
| Popis: | This study shows a good performance of quasicrystal Al62,2Cu25,3Fe12,5 as catalyst in catalytic reactions. This metal catalyst, without being leached with acid or base, with dry stoichiometric composition, Al62,2Cu25,3Fe12,5 is revealed among the reactions which occurred to be a partial oxidation; and promoted the formation of products: methanol, methanal + methanoic acid, water and dimethyl ether. For this research were used such experimental techniques as X-ray Diffraction (XRD to follow the evolution of the alloy phase, the Scanning Electron Microscopy (SEM) that provides the study of surface microstructure, and Transmission Electron Microscopy (MET). All these techniques study the morphology of the internal phase, and defect a quasicrystalline nucleus. Catalytic tests of methanol conversion and selectivity intermediate products were obtained using this catalyst quasicrystal. The activity and stability of quasicrystal catalyst for reforming of methanol vapor show sufficient growth compared to the other catalysts. Fe and Cu species are highly dispersed in the homogeneous layer of quasicrystal catalyst which increase the catalytic activity and suppress the aggregation of Cu particles. We suppose that the quasicrystal can be a good catalyst used in a catalytic steam reforming, with high catalytic activity and excellent thermal stability. |
| Databáze: | Directory of Open Access Journals |
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