Experimental design, operation, and results of a 4 kW high temperature steam electrolysis experiment

Abstract High temperature steam electrolysis (HTSE) is a promising technology for large-scale hydrogen production. However, research on HTSE performance above the kW level is limited. This paper presents the results of 4 kW HTSE long-term test completed in a multi-kW test facility recently developed at the Idaho National Laboratory (INL). The 4 kW HTSE unit consisted of two solid oxide electrolysis stacks electrically connected in parallel, each of which included 40 electrode-supported planar cells. A current density of 0.41 A cm −2 was used for the long-term operating at a constant current mode, resulting in a theoretical hydrogen production rate about 23 slpm. A demonstration of 830 h stable operation was achieved with a degradation rate of 3.1% per 1000 h. The paper also includes detailed descriptions of the piping layout, steam generation and delivery system, test fixture, heat recuperation system, hot zone, instrumentation, and operating conditions. This successful demonstration of multi-kW scale HTSE unit will help to advance the technology toward near-term commercialization.

[1]  Qing-shan Li,et al.  Investigation of 30-cell solid oxide electrolyzer stack modules for hydrogen production , 2014 .

[2]  G. Dietrich,et al.  Electrochemical high temperature technology for hydrogen production or direct electricity generation , 1988 .

[3]  W. Doenitz,et al.  Concepts and design for scaling up high temperature water vapour electrolysis , 1982 .

[4]  W. Dönitz,et al.  High-temperature electrolysis of water vapor—status of development and perspectives for application , 1985 .

[5]  V. Utgikar,et al.  Life cycle assessment of high temperature electrolysis for hydrogen production via nuclear energy , 2006 .

[6]  Carl M. Stoots,et al.  3D CFD model of a multi-cell high-temperature electrolysis stack , 2007 .

[7]  J. O’Brien,et al.  Improved durability of SOEC stacks for high temperature electrolysis , 2013 .

[8]  Ji Haeng Yu,et al.  Hydrogen production performance of 3-cell flat-tubular solid oxide electrolysis stack , 2012 .

[9]  Carl M. Stoots,et al.  Syngas Production via High-Temperature Coelectrolysis of Steam and Carbon Dioxide , 2009 .

[10]  K. Yoon,et al.  Electrochemical performance and long-term durability of a 200 W-class solid oxide regenerative fuel cell stack , 2014 .

[11]  Florence Lefebvre-Joud,et al.  High Temperature Steam Electrolysis Stack with Enhanced Performance and Durability , 2012 .

[12]  J. O’Brien,et al.  Progress in high-temperature electrolysis for hydrogen production using planar SOFC technology , 2005 .

[13]  B. Yildiz,et al.  Degradation Issues in Solid Oxide Cells During High Temperature Electrolysis , 2010 .

[14]  Boxuan Yu,et al.  Advance in highly efficient hydrogen production by high temperature steam electrolysis , 2008 .

[15]  Annabelle Brisse,et al.  High Temperature Electrolysis at EIFER, Main Achievements at Cell and Stack Level , 2012 .

[16]  Yu Bo,et al.  Status and research of highly efficient hydrogen production through high temperature steam electrolysis at INET , 2010 .

[17]  S. Ebbesen,et al.  Durable SOC stacks for production of hydrogen and synthesis gas by high temperature electrolysis , 2011 .

[18]  J. O’Brien,et al.  High-temperature electrolysis for large-scale hydrogen production from nuclear energy – Experimental investigations , 2010 .

[19]  Qing-shan Li,et al.  Achieving high-efficiency hydrogen production using planar solid-oxide electrolysis stacks , 2014 .

[20]  R. Streicher,et al.  Hydrogen production by high temperature electrolysis of water vapour , 1980 .

[21]  André Chatroux,et al.  Enhanced Performance and Durability of a High Temperature Steam Electrolysis Stack , 2013 .