Oxidative dehydrogenation of ethane: A study over the structure and robustness of Ni–W–O catalysts
| Autor: | Ana Dejoz, Benjamín Solsona, J.M. López Nieto, Isabel Vázquez, Said Agouram, F. Ivars |
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| Rok vydání: | 2014 |
| Předmět: |
inorganic chemicals
Ethylene Hydrogen General Chemical Engineering Catalyst support Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Catalysis Methane chemistry.chemical_compound Dehydrogenation Nickel tungsten Oxidative dehydrogenation of ethane Oxide catalysts Ethane Chemistry organic chemicals Nickel oxide Coke Fuel Technology Ni-W-O Oxidative dehydrogenation |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| ISSN: | 0378-3820 |
| DOI: | 10.1016/j.fuproc.2013.10.017 |
| Popis: | [EN] The robustness of one selected Ni-W-O catalyst has been studied in the oxidative dehydrogenation of ethane. This catalyst initially deactivates for the first 10 h online decreasing 15% of its catalytic activity compared to its initial stable catalytic activity. However from 10 to 60 h online the catalytic activity keeps almost stable. On the other hand, it has been shown that the Ni-W-O catalyst cannot tolerate an oxygen-free atmosphere (C-2 and He) as nickel oxide is transformed into metallic nickel. Methane and hydrogen as well as abundant coke were formed on the surface of the catalyst in these O-free conditions. However a re-calcination in air leads to the removal of coke, the catalytic performance in the oxidative dehydrogenation of ethane being almost completely restored. Financial support from DGICYT in Spain (Projects CTQ2012-37925-C03-01 and CTQ2012-37925-C03-03) is gratefully acknowledged. The authors also want to thank the SCSIE, University of Valencia, for providing HRTEM facilities. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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