Integrated Co‐Electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO(2) and H(2)O

The concept of an integrated power‐to‐gas (P2G) process was demonstrated for renewable energy storage by converting renewable electrical energy to synthetic fuels. Such a dynamically integrated process enables direct production of synthetic natural gas (SNG) from CO(2) and H(2)O. The produced SNG ca...

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Autores principales: Mebrahtu, Chalachew, Nohl, Markus, Dittrich, Lucy, Foit, Severin R., de Haart, L. G. J. (Bert), Eichel, Rüdiger‐A., Palkovits, Regina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8252491/
https://www.ncbi.nlm.nih.gov/pubmed/33901333
http://dx.doi.org/10.1002/cssc.202002904
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author Mebrahtu, Chalachew
Nohl, Markus
Dittrich, Lucy
Foit, Severin R.
de Haart, L. G. J. (Bert)
Eichel, Rüdiger‐A.
Palkovits, Regina
author_facet Mebrahtu, Chalachew
Nohl, Markus
Dittrich, Lucy
Foit, Severin R.
de Haart, L. G. J. (Bert)
Eichel, Rüdiger‐A.
Palkovits, Regina
author_sort Mebrahtu, Chalachew
collection PubMed
description The concept of an integrated power‐to‐gas (P2G) process was demonstrated for renewable energy storage by converting renewable electrical energy to synthetic fuels. Such a dynamically integrated process enables direct production of synthetic natural gas (SNG) from CO(2) and H(2)O. The produced SNG can be stored or directly injected into the existing natural gas network. To study process integration, operating parameters of the high‐temperature solid oxide electrolysis cell (SOEC) producing syngas (H(2)+CO) mixtures through co‐electrolysis and a fixed bed reactor for syngas methanation of such gas mixtures were first optimized individually. Reactor design, operating conditions, and enhanced SNG selectivity were the main targets of the study. SOEC experiments were performed on state‐of‐the‐art button cells. Varying operating conditions (temperature, flow rate, gas mixture and current density) emphasized the capability of the system to produce tailor‐made syngas mixtures for downstream methanation. Catalytic syngas methanation was performed using hydrotalcite‐derived 20 %Ni‐2 %Fe/(Mg,Al)O(x) catalyst and commercial methanation catalyst (Ni/Al(2)O(3)) as reference. Despite water in the feed mixture, SNG with high selectivity (≥90 %) was produced at 300 °C and atmospheric pressure. An adequate rate of syngas conversion was obtained with H(2)O contents up to 30 %, decreasing significantly for 50 % H(2)O in the feed. Compared to the commercial catalyst, 20 %Ni‐2 %Fe/(Mg,Al)O(x) enabled a higher rate of CO(x) conversion.
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spelling pubmed-82524912021-07-07 Integrated Co‐Electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO(2) and H(2)O Mebrahtu, Chalachew Nohl, Markus Dittrich, Lucy Foit, Severin R. de Haart, L. G. J. (Bert) Eichel, Rüdiger‐A. Palkovits, Regina ChemSusChem Concepts The concept of an integrated power‐to‐gas (P2G) process was demonstrated for renewable energy storage by converting renewable electrical energy to synthetic fuels. Such a dynamically integrated process enables direct production of synthetic natural gas (SNG) from CO(2) and H(2)O. The produced SNG can be stored or directly injected into the existing natural gas network. To study process integration, operating parameters of the high‐temperature solid oxide electrolysis cell (SOEC) producing syngas (H(2)+CO) mixtures through co‐electrolysis and a fixed bed reactor for syngas methanation of such gas mixtures were first optimized individually. Reactor design, operating conditions, and enhanced SNG selectivity were the main targets of the study. SOEC experiments were performed on state‐of‐the‐art button cells. Varying operating conditions (temperature, flow rate, gas mixture and current density) emphasized the capability of the system to produce tailor‐made syngas mixtures for downstream methanation. Catalytic syngas methanation was performed using hydrotalcite‐derived 20 %Ni‐2 %Fe/(Mg,Al)O(x) catalyst and commercial methanation catalyst (Ni/Al(2)O(3)) as reference. Despite water in the feed mixture, SNG with high selectivity (≥90 %) was produced at 300 °C and atmospheric pressure. An adequate rate of syngas conversion was obtained with H(2)O contents up to 30 %, decreasing significantly for 50 % H(2)O in the feed. Compared to the commercial catalyst, 20 %Ni‐2 %Fe/(Mg,Al)O(x) enabled a higher rate of CO(x) conversion. John Wiley and Sons Inc. 2021-05-07 2021-06-08 /pmc/articles/PMC8252491/ /pubmed/33901333 http://dx.doi.org/10.1002/cssc.202002904 Text en © 2021 The Authors. ChemSusChem published by Wiley-VCH GmbH https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Concepts
Mebrahtu, Chalachew
Nohl, Markus
Dittrich, Lucy
Foit, Severin R.
de Haart, L. G. J. (Bert)
Eichel, Rüdiger‐A.
Palkovits, Regina
Integrated Co‐Electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO(2) and H(2)O
title Integrated Co‐Electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO(2) and H(2)O
title_full Integrated Co‐Electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO(2) and H(2)O
title_fullStr Integrated Co‐Electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO(2) and H(2)O
title_full_unstemmed Integrated Co‐Electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO(2) and H(2)O
title_short Integrated Co‐Electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO(2) and H(2)O
title_sort integrated co‐electrolysis and syngas methanation for the direct production of synthetic natural gas from co(2) and h(2)o
topic Concepts
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8252491/
https://www.ncbi.nlm.nih.gov/pubmed/33901333
http://dx.doi.org/10.1002/cssc.202002904
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