The work presented herein takes into account the fundamental and technological issues associated to the realization of water electrolysis in an alkaline environment, without the use of devices with proton exchange membrane (PEM). Due to the high cost and limited availability of platinum group metals (PGM), used as catalysts in PEM electrolysers, these devices have little chance of being employed in the production of hydrogen on a large scale. Owing to recent advances in the development of non-PGM catalysts, this limitation can be overcome by using non-PEM alkaline electrolysis systems. The experimental results collected in this thesis demonstrate how an alkaline electrolyser, with performances comparable with those of PEM electrolysers, can be achieved without resorting to PGM and high stability and durability catalysts. The studies on the advantages and limitations of such electrolysers, with different architectures, show how a judicious application of differential pressure in a system with electrolyte recirculation helps to reduce the limits of mass transport and increases the system efficiency and power density.

(2014). Sviluppo di sistemi di produzione elettrolitica di idrogeno senza ricorso a catalizzatori del gruppo del platino [doctoral thesis - tesi di dottorato]. Retrieved from http://hdl.handle.net/10446/30627

Sviluppo di sistemi di produzione elettrolitica di idrogeno senza ricorso a catalizzatori del gruppo del platino

PESENTI, Rachele
2014-05-22

Abstract

The work presented herein takes into account the fundamental and technological issues associated to the realization of water electrolysis in an alkaline environment, without the use of devices with proton exchange membrane (PEM). Due to the high cost and limited availability of platinum group metals (PGM), used as catalysts in PEM electrolysers, these devices have little chance of being employed in the production of hydrogen on a large scale. Owing to recent advances in the development of non-PGM catalysts, this limitation can be overcome by using non-PEM alkaline electrolysis systems. The experimental results collected in this thesis demonstrate how an alkaline electrolyser, with performances comparable with those of PEM electrolysers, can be achieved without resorting to PGM and high stability and durability catalysts. The studies on the advantages and limitations of such electrolysers, with different architectures, show how a judicious application of differential pressure in a system with electrolyte recirculation helps to reduce the limits of mass transport and increases the system efficiency and power density.
22-mag-2014
26
2012/2013
TECNOLOGIE PER L'ENERGIA E L'AMBIENTE
Pesenti, Rachele
File allegato/i alla scheda:
File Dimensione del file Formato  
Tesi Pesenti 2014.pdf

accesso aperto

Versione: publisher's version - versione editoriale
Licenza: Licenza default Aisberg
Dimensione del file 9.86 MB
Formato Adobe PDF
9.86 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Aisberg ©2008 Servizi bibliotecari, Università degli studi di Bergamo | Terms of use/Condizioni di utilizzo

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/30627
Citazioni
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact