TY - JOUR
T1 - Exergy valorization of a water electrolyzer and CO 2 hydrogenation tandem system for hydrogen and methane production
AU - Mendoza-Hernandez, Omar S.
AU - Shima, Asuka
AU - Matsumoto, Hiroshige
AU - Inoue, Mitsuhiro
AU - Abe, Takayuki
AU - Matsuzaki, Yoshio
AU - Sone, Yoshitsugu
N1 - Funding Information:
This work was supported by CREST (Creation of Innovative Core Technology for Manufacture and Use of Energy Carriers from Renewable Energy) JST, Japan.
Publisher Copyright:
© 2019, The Author(s).
PY - 2019/12/1
Y1 - 2019/12/1
N2 - In this work, we introduce a water electrolysis and CO 2 hydrogenation tandem system which focuses on methane generation. The concept consists of a water electrolyzer thermally coupled to a CO 2 hydrogenation reactor, where the power required to generate hydrogen comes from renewable energy. A thermodynamic analysis of the tandem system was carried out. Our analysis exposes that it is possible to increase the exergy efficiency of the water electrolyzer and CO 2 hydrogenation system by thermal coupling, where the thermal energy required to split water into H 2 and O 2 during the electrolysis process is compensated by the heat generated during the CO 2 hydrogenation reaction. Here, the conditions at which high exergy efficiency can be achieved were identified.
AB - In this work, we introduce a water electrolysis and CO 2 hydrogenation tandem system which focuses on methane generation. The concept consists of a water electrolyzer thermally coupled to a CO 2 hydrogenation reactor, where the power required to generate hydrogen comes from renewable energy. A thermodynamic analysis of the tandem system was carried out. Our analysis exposes that it is possible to increase the exergy efficiency of the water electrolyzer and CO 2 hydrogenation system by thermal coupling, where the thermal energy required to split water into H 2 and O 2 during the electrolysis process is compensated by the heat generated during the CO 2 hydrogenation reaction. Here, the conditions at which high exergy efficiency can be achieved were identified.
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U2 - 10.1038/s41598-019-42814-6
DO - 10.1038/s41598-019-42814-6
M3 - Article
C2 - 31015548
AN - SCOPUS:85064948448
SN - 2045-2322
VL - 9
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 6470
ER -
