Publication: Performance analysis of solid-oxide electrolysis cells for syngas production by H2O/CO2 co-electrolysis
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Issued Date
2017
Resource Type
File Type
application/pdf
ISSN
22839216
Other identifier(s)
2-s2.0-85021658559
Rights Holder(s)
Scopus
Bibliographic Citation
Chemical Engineering Transactions. Vol 57, (2017), p.1627-1632
Suggested Citation
Saebea D., Authayanun S., Patcharavorachot Y., Soisuwan S., Assabumrungrat S., Arpornwichanop A. Performance analysis of solid-oxide electrolysis cells for syngas production by H2O/CO2 co-electrolysis. Chemical Engineering Transactions. Vol 57, (2017), p.1627-1632. doi:10.3303/CET1757272 Retrieved from: https://hdl.handle.net/20.500.14740/4589
Abstract
High-temperature solid oxide electrolysis cells (SOECs) are promising technologies to store excess renewable energy generation. In this work, the mathematical model of SOEC, which can describe the behaviour of a cathode-supported SOEC operating for H2O and CO2 co-electrolysis, is developed from mass balance, dusty gas model, and electrochemical model. The validated SOEC model is used to analyse the influence of the reversible water-gas shift reaction taking place on the cathode on the performance of the SOEC for syngas production. The simulation results show that the reverse water-gas shift reaction is highly pronounced at the cathode surface due to high CO2 component and can contribute to CO production. The rate of water-gas shift reaction increases along the depth of the cathode to the three-phase boundary. At the three-phase boundary, an increase in operating temperatures results in the enhancement of the rate of water-gas shift reaction. Additionally, regarding the SOEC performance, the electrical energy consumed for co-electrolysis in SOEC decreases with increasing temperature because the activation overpotentials and ohmic overpotentials are lower. © Copyright 2017, AIDIC Servizi S.r.l.
Subject(s)
Carbon dioxide
Cathodes
Electrodes
Electrolysis
Electrolytic cells
Gases
Renewable energy resources
Solid oxide fuel cells (SOFC)
Synthesis gas
Temperature
Water gas shift
Electrochemical modeling
Increasing temperatures
Operating temperature
Performance analysis
Renewable energy generation
Reverse water-gas shift reaction
Three phase boundary
Water gas shift (WGS) reaction
Regenerative fuel cells
Cathodes
Electrodes
Electrolysis
Electrolytic cells
Gases
Renewable energy resources
Solid oxide fuel cells (SOFC)
Synthesis gas
Temperature
Water gas shift
Electrochemical modeling
Increasing temperatures
Operating temperature
Performance analysis
Renewable energy generation
Reverse water-gas shift reaction
Three phase boundary
Water gas shift (WGS) reaction
Regenerative fuel cells