Steam reforming of ethanol on copper catalysts derived from hydrotalcite-like materials / A. F. Cunha in Industrial & engineering chemistry research, Vol. 51 N° 40 (Octobre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13132-13143 Titre : Steam reforming of ethanol on copper catalysts derived from hydrotalcite-like materials Type de document : texte imprimé Auteurs : A. F. Cunha, Auteur ; Y. J. Wu, Auteur ; J. C. Santos, Auteur Année de publication : 2012 Article en page(s) : pp. 13132-13143 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalyst Steam reforming Résumé : Steam reforming of ethanol (SRE) and sorption enhanced steam reforming of ethanol (SE-SRE) on Cu,Zn,Al matenals was studied in the temperature range between 200 and 600 °C for hydrogen production. Precursors with different structures, such as a hydrotalcite-like compound (CuZnAl-HT), zincian malachite derivative (CuZnAl-REF, a reference catalyst precursor for the synthesis of methanol) and amorphous material with embedded copper particles (CuZnAl-ECP), were employed to obtain the active phases. Among the three samples used, the CuZnAl-HT catalyst shows the highest activity (ethanol and water conversion) and selectivity (hydrogen yield). This material also shows a satisfying stability, as the ethanol conversion only decreases around 20% at 400 °C during 12 h of lifetime test. In addition, carbon dioxide uptake during the transient period of SRE was found on the CuZnAl based materials. Especially for the CuZnAl-HT catalyst a SE-SRE phenomena was perfectly observed at 400 °C due to a relative good interaction of carbon dioxide formed in the initial transient period of reaction and the ZnO phase present in the catalyst. Probably, also retained traces of the hydrotalcite-like precursor structure on the CuZnAl-HT catalyst used are responsible for the observed SE-SRE phenomena. Breakthrough tests were performed with the CuZnAl-HT catalyst. This material shows a carbon dioxide adsorption capacity from 0.11 to 0.18 mol/kg, which is a prerequisite for SE-SRE. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26451462 [article] Steam reforming of ethanol on copper catalysts derived from hydrotalcite-like materials [texte imprimé] / A. F. Cunha, Auteur ; Y. J. Wu, Auteur ; J. C. Santos, Auteur . - 2012 . - pp. 13132-13143. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13132-13143 Mots-clés : Catalyst Steam reforming Résumé : Steam reforming of ethanol (SRE) and sorption enhanced steam reforming of ethanol (SE-SRE) on Cu,Zn,Al matenals was studied in the temperature range between 200 and 600 °C for hydrogen production. Precursors with different structures, such as a hydrotalcite-like compound (CuZnAl-HT), zincian malachite derivative (CuZnAl-REF, a reference catalyst precursor for the synthesis of methanol) and amorphous material with embedded copper particles (CuZnAl-ECP), were employed to obtain the active phases. Among the three samples used, the CuZnAl-HT catalyst shows the highest activity (ethanol and water conversion) and selectivity (hydrogen yield). This material also shows a satisfying stability, as the ethanol conversion only decreases around 20% at 400 °C during 12 h of lifetime test. In addition, carbon dioxide uptake during the transient period of SRE was found on the CuZnAl based materials. Especially for the CuZnAl-HT catalyst a SE-SRE phenomena was perfectly observed at 400 °C due to a relative good interaction of carbon dioxide formed in the initial transient period of reaction and the ZnO phase present in the catalyst. Probably, also retained traces of the hydrotalcite-like precursor structure on the CuZnAl-HT catalyst used are responsible for the observed SE-SRE phenomena. Breakthrough tests were performed with the CuZnAl-HT catalyst. This material shows a carbon dioxide adsorption capacity from 0.11 to 0.18 mol/kg, which is a prerequisite for SE-SRE. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26451462

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