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Challenges in Generating Hydrogen by High Temperature Electrolysis Using Solid Oxide Cells.

DE2008927428

Publication Date	2008
Personal Author	Sohal, M. S.; O'Brien, J. E.; Stoots, C. M.; McKellar, M. G.; Harvego, E. A.
Page Count	18
Abstract	Idaho National Laboratory's (INL) high temperature electrolysis research to generate hydrogen using solid oxide electrolysis cells is presented in this paper. The research results reported here have been obtained in a laboratory-scale apparatus. These results and common scale-up issues also indicate that for the technology to be successful in a large industrial setting, several technical, economical, and manufacturing issues have to be resolved. Some of the issues related to solid oxide cells are stack design and performance optimization, identification and evaluation of cell performance degradation parameters and processes, integrity and reliability of the solid oxide electrolysis (SOEC) stacks, life-time prediction and extension of the SOEC stack, and cost reduction and economic manufacturing of the SOEC stacks. Besides the solid oxide cells, balance of the hydrogen generating plant also needs significant development. These issues are process and ohmic heat source needed for maintaining the reaction temperature (approx. 830DGC), high temperature heat exchangers and recuperators, equal distribution of the reactants into each cell, system analysis of hydrogen and associated energy generating plant, and cost optimization. An economic analysis of this plant was performed using the standardized H2A Analysis Methodology developed by the Department of Energy (DOE) Hydrogen Program, and using realistic financial and cost estimating assumptions.
Keywords	Hydrogen production Solid oxide cells Electrolysis Optimization Oxides Performance Reliability Design Economic analysis Forecasting Heat exchangers Heat sources Manufacturers Manufacturing Nuclear power plants High temperature Solid oxide electrolysis cells
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Idaho National Laboratory, Idaho Falls, ID.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200824

Challenges in Generating Hydrogen by High Temperature Electrolysis Using Solid Oxide Cells.

Challenges in Generating Hydrogen by High Temperature Electrolysis Using Solid Oxide Cells.
DE2008927428

Publication Date	2008
Personal Author	Sohal, M. S.; O'Brien, J. E.; Stoots, C. M.; McKellar, M. G.; Harvego, E. A.
Page Count	18
Abstract	Idaho National Laboratory's (INL) high temperature electrolysis research to generate hydrogen using solid oxide electrolysis cells is presented in this paper. The research results reported here have been obtained in a laboratory-scale apparatus. These results and common scale-up issues also indicate that for the technology to be successful in a large industrial setting, several technical, economical, and manufacturing issues have to be resolved. Some of the issues related to solid oxide cells are stack design and performance optimization, identification and evaluation of cell performance degradation parameters and processes, integrity and reliability of the solid oxide electrolysis (SOEC) stacks, life-time prediction and extension of the SOEC stack, and cost reduction and economic manufacturing of the SOEC stacks. Besides the solid oxide cells, balance of the hydrogen generating plant also needs significant development. These issues are process and ohmic heat source needed for maintaining the reaction temperature (approx. 830DGC), high temperature heat exchangers and recuperators, equal distribution of the reactants into each cell, system analysis of hydrogen and associated energy generating plant, and cost optimization. An economic analysis of this plant was performed using the standardized H2A Analysis Methodology developed by the Department of Energy (DOE) Hydrogen Program, and using realistic financial and cost estimating assumptions.
Keywords	Hydrogen production Solid oxide cells Electrolysis Optimization Oxides Performance Reliability Design Economic analysis Forecasting Heat exchangers Heat sources Manufacturers Manufacturing Nuclear power plants High temperature Solid oxide electrolysis cells
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Idaho National Laboratory, Idaho Falls, ID.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200824