Development of a Solid Oxide Electrolysis Stack Able to Operate at High Steam Conversion Rate and Integration into a SOE System. (30th May 2017)

• Record Type: Journal Article
• Authors: Mougin, Julie; Di Iorio, Stéphane; Chatroux, André; Donnier-Marechal, Thomas; Palcoux, Geraldine; Petitjean, Marie; Roux, Guilhem
• Is Part Of: ECS transactions. Volume 78:Number 1(2017)
• Page Start: 3065
• Page End: 3075
• Publication Date: 2017-05-30
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/07801.3065ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : Solid Oxide Electrolysis (SOE) technology is considered to be a highly efficient process to produce hydrogen. Steam conversion rate is one of the key parameters in the overall system efficiency. The present paper presents the methodology undertaken to develop a stack design able to operate at high steam conversion rates (80% or above). It has been shown that with these design modifications, i-V curves can be recorded up to a steam conversion rate of 100%. The apparition of limiting current is shifted to values much above 75%. It has been found that the design modification not only allows to reach higher steam conversion rates, but also improves the gas distribution homogeneity into the stack. Finally, a 25-cell stack with the modified design has been integrated into a SOE system including all BoP components. It has been possible to operate it up to a value of steam conversion of 80%.