Imperial College London
Alternate

ProfessorChristosMarkides

Faculty of Engineering, Department of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
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Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
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Location

 

404ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jalili:2023:10.1016/j.apenergy.2022.120268,
author = {Jalili, M and Ghazanfari, Holagh S and Chitsaz, A and Song, J and Markides, CN},
doi = {10.1016/j.apenergy.2022.120268},
journal = {Applied Energy},
pages = {1--17},
title = {Electrolyzer cell-methanation/Sabatier reactors integration for power-to-gas energy storage: Thermo-economic analysis and multi-objective optimization},
url = {http://dx.doi.org/10.1016/j.apenergy.2022.120268},
volume = {329},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The main objective of this study is to compare and optimize two power-to-gas energy storage systems from a thermo-economic perspective. The first system is based on a solid oxide electrolyzer cell (SOEC) combined with a methanation reactor, and the second is based on a polymer electrolyte membrane electrolyzer cell (PEMEC) integrated into a Sabatier reactor. The first system relies on the co-electrolysis of steam and carbon dioxide followed by methanation, whereas the basis of the second system is hydrogen production and conversion into methane via a Sabatier reaction. The systems are also analyzed for being applied in different countries and being fed by different renewable and non- renewable power sources. Simulation results of both systems were compared with similar studies from the literature; the errors were negligible, acknowledging the reliability and accuracy of the simulations. The results reveal that for the same carbon dioxide availability (i.e., flow rate), the SOEC-based system has higher exergy and power-to-gas efficiencies, and lower electricity consumption compared to the PEMEC-based system. However, the PEMEC-based system produces 1.2 % more methane, also with a lower heating value (LHV) of the generated gas mixture that is 7.6 % higher than that of the SOEC-based system. Additionally, the levelized cost of energy (based on the LHV) of the SOEC-based system is found to be 11 % lower. A lifecycle analysis indicates that the lowest lifecycle cost is attained when solar PV systems are employed as the electricity supply option. Eventually, the SOEC-based system is found to be more attractive for power-to-gas purposes from a thermo-economic standpoint.
AU  - Jalili,M
AU  - Ghazanfari,Holagh S
AU  - Chitsaz,A
AU  - Song,J
AU  - Markides,CN
DO  - 10.1016/j.apenergy.2022.120268
EP  - 17
PY  - 2023///
SN  - 0306-2619
SP  - 1
TI  - Electrolyzer cell-methanation/Sabatier reactors integration for power-to-gas energy storage: Thermo-economic analysis and multi-objective optimization
T2  - Applied Energy
UR  - http://dx.doi.org/10.1016/j.apenergy.2022.120268
UR  - https://www.sciencedirect.com/science/article/pii/S0306261922015252?via%3Dihub
UR  - http://hdl.handle.net/10044/1/100882
VL  - 329
ER  -
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