The selective and simultaneous production of hydrogen and chemicals from renewable alcohols, such as ethanol, glycerol, and ethylene glycol, can be accomplished by means of electrolyzers in which the anode electrocatalyst is appropriately designed to promote the partial and selective oxidation of the alcohol. In the electrolyzers described herein, the production of 1 kg of hydrogen from aqueous ethanol occurs with one-third the amount of energy required by a traditional H(2)/O(2) electrolyzer, by virtue of the much lower oxidation potential of ethanol to acetate vs. water to oxygen in alkaline media (E(0)=0.10 V vs. 1.23 V). The self-sustainability of H(2) production is ensured by the simultaneous production of 25 kg of potassium acetate for every kg of H(2), if the promoting co-electrolyte is KOH.
Self-sustainable production of hydrogen, chemicals and energy from renewable alcohols by electrocatalysis / V. Bambagioni; M. Bevilacqua; C. Bianchini; J. Filippi; A. Marchionni; F. Vizza; C. Bianchini; P. K. Shen. - In: CHEMSUSCHEM. - ISSN 1864-5631. - ELETTRONICO. - 3:(2010), pp. 851-855. [10.1002/cssc.201000103]
Self-sustainable production of hydrogen, chemicals and energy from renewable alcohols by electrocatalysis
BAMBAGIONI, VALENTINA;BIANCHINI, CLAUDIO;FILIPPI, JONATHAN;MARCHIONNI, ANDREA;VIZZA, FRANCESCO;
2010
Abstract
The selective and simultaneous production of hydrogen and chemicals from renewable alcohols, such as ethanol, glycerol, and ethylene glycol, can be accomplished by means of electrolyzers in which the anode electrocatalyst is appropriately designed to promote the partial and selective oxidation of the alcohol. In the electrolyzers described herein, the production of 1 kg of hydrogen from aqueous ethanol occurs with one-third the amount of energy required by a traditional H(2)/O(2) electrolyzer, by virtue of the much lower oxidation potential of ethanol to acetate vs. water to oxygen in alkaline media (E(0)=0.10 V vs. 1.23 V). The self-sustainability of H(2) production is ensured by the simultaneous production of 25 kg of potassium acetate for every kg of H(2), if the promoting co-electrolyte is KOH.File | Dimensione | Formato | |
---|---|---|---|
CSC_Elettrolisi_copia on line.PDF
Accesso chiuso
Tipologia:
Versione finale referata (Postprint, Accepted manuscript)
Licenza:
Tutti i diritti riservati
Dimensione
4.02 MB
Formato
Adobe PDF
|
4.02 MB | Adobe PDF | Richiedi una copia |
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.