Home > Publications database > Integrated Co-electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO2 and H2O > print

001     894028
005     20240712112829.0
024 7 _ |a 10.1002/cssc.202002904
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024 7 _ |a 1864-5631
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100 1 _ |a Mebrathu, C.
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245 _ _ |a Integrated Co-electrolysis and Syngas Methanation for the Direct Production of Synthetic Natural Gas from CO2 and H2O
260 _ _ |a Weinheim
|c 2021
|b Wiley-VCH
336 7 _ |a article
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520 _ _ |a 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 CO2 and H2O. 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 (H2+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)Ox catalyst and commercial methanation catalyst (Ni/Al2O3) 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 H2O contents up to 30 %, decreasing significantly for 50 % H2O in the feed. Compared to the commercial catalyst, 20 %Ni-2 %Fe/(Mg,Al)Ox enabled a higher rate of COx conversion.
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536 _ _ |a HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406)
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700 1 _ |a Nohl, Markus
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700 1 _ |a Dittrich, Lucy
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700 1 _ |a Foit, Severin
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700 1 _ |a de Haart, L. G. J.
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700 1 _ |a Eichel, Rüdiger-A.
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700 1 _ |a Palkovits, Regina
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773 _ _ |a 10.1002/cssc.202002904
|g Vol. 14, no. 11, p. 2295 - 2302
|0 PERI:(DE-600)2411405-4
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|t ChemSusChem
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856 4 _ |u https://juser.fz-juelich.de/record/894028/files/cssc.202002904.pdf
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