Kinetics of hydrogen uptake and release from heteroaromatic compounds for hydrogen storage / Farnaz Sotoodeh in Industrial & engineering chemistry research, Vol. 49 N° 3 (Fevrier 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1018–1026 Titre : Kinetics of hydrogen uptake and release from heteroaromatic compounds for hydrogen storage Type de document : texte imprimé Auteurs : Farnaz Sotoodeh, Auteur ; Kevin J. Smith, Auteur Année de publication : 2010 Article en page(s) : pp. 1018–1026 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Kinetics--Hydrogen--Uptake--Compounds--Heteroaromatic--Hydrogen--Storage-- Résumé : The kinetics of hydrogen uptake by N-ethylcarbazole and carbazole, and the kinetics of H2 release from their hydrogenated products, is reported. The hydrogenation of N-ethylcarbazole at 130−150 °C on Ru was well described by a network of first-order stepwise hydrogenation reactions. The hydrogenation of N-ethylcarbazole was significantly faster than the hydrogenation of carbazole, and in both cases, >95% selectivity to the completely hydrogenated products, dodecahydro-N-ethylcarbazole and dodecahydrocarbazole, was achieved. The dehydrogenation of dodecahydro-N-ethylcarbazole at 101 kPa and 150−170 °C, proceeded to 100% conversion of the reactant over a Pd catalyst within 1 h. However, only 69% of the stored H2 was recovered due to a low selectivity to N-ethylcarbazole. In the case of dodecahydrocarbazole dehydrogenation at 101 kPa and 170 °C over the same Pd catalyst, 28% H2 recovery was obtained due to the strong adsorption of the product carbazole on the catalyst surface that also resulted in a slower rate of dodecahydrocarbazole dehydrogenation compared to dodecahydro-N-ethylcarbazole. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9007002 [article] Kinetics of hydrogen uptake and release from heteroaromatic compounds for hydrogen storage [texte imprimé] / Farnaz Sotoodeh, Auteur ; Kevin J. Smith, Auteur . - 2010 . - pp. 1018–1026. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1018–1026 Mots-clés : Kinetics--Hydrogen--Uptake--Compounds--Heteroaromatic--Hydrogen--Storage-- Résumé : The kinetics of hydrogen uptake by N-ethylcarbazole and carbazole, and the kinetics of H2 release from their hydrogenated products, is reported. The hydrogenation of N-ethylcarbazole at 130−150 °C on Ru was well described by a network of first-order stepwise hydrogenation reactions. The hydrogenation of N-ethylcarbazole was significantly faster than the hydrogenation of carbazole, and in both cases, >95% selectivity to the completely hydrogenated products, dodecahydro-N-ethylcarbazole and dodecahydrocarbazole, was achieved. The dehydrogenation of dodecahydro-N-ethylcarbazole at 101 kPa and 150−170 °C, proceeded to 100% conversion of the reactant over a Pd catalyst within 1 h. However, only 69% of the stored H2 was recovered due to a low selectivity to N-ethylcarbazole. In the case of dodecahydrocarbazole dehydrogenation at 101 kPa and 170 °C over the same Pd catalyst, 28% H2 recovery was obtained due to the strong adsorption of the product carbazole on the catalyst surface that also resulted in a slower rate of dodecahydrocarbazole dehydrogenation compared to dodecahydro-N-ethylcarbazole. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9007002

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