Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.3390/bioengineering11020165 |
Licence  |
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| Title (Primary) | Optimization of the ex situ biomethanation of hydrogen and carbon dioxide in a novel meandering plug flow reactor: Start-up phase and flexible operation |
| Author | Hoffstadt, K.; Nikolausz, M.; Krafft, S.; Bonatelli, M.L.; Kumar, V.; Harms, H.; Kuperjans, I. |
| Source Titel | Bioengineering |
| Year | 2024 |
| Department | MIBITECH; AME |
| Volume | 11 |
| Issue | 2 |
| Page From | art. 165 |
| Language | englisch |
| Topic | T7 Bioeconomy |
| Supplements | https://www.mdpi.com/article/10.3390/bioengineering11020165/s1 |
| Keywords | methanation; plug flow reactor; bubble column; biomethane; power-to-gas; P2G |
| Abstract | With the increasing use of renewable energy resources for the power grid, the need for long-term storage technologies, such as power-to-gas systems, is growing. Biomethanation provides the opportunity to store energy in the form of the natural gas-equivalent biomethane. This study investigates a novel plug flow reactor that employs a helical static mixer for the biological methanation of hydrogen and carbon dioxide. In tests, the reactor achieved an average methane production rate of 2.5 LCH4/LR∗d (methane production [LCH4] per liter of reactor volume [LR] per day [d]) with a maximum methane content of 94%. It demonstrated good flexibilization properties, as repeated 12 h downtimes did not negatively impact the process. The genera Methanothermobacter and Methanobacterium were predominant during the initial phase, along with volatile organic acid-producing, hydrogenotrophic, and proteolytic bacteria. The average ratio of volatile organic acid to total inorganic carbon increased to 0.52 ± 0.04, while the pH remained stable at an average of pH 8.1 ± 0.25 from day 32 to 98, spanning stable and flexible operation modes. This study contributes to the development of efficient flexible biological methanation systems for sustainable energy storage and management. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=28797 |
| Hoffstadt, K., Nikolausz, M., Krafft, S., Bonatelli, M.L., Kumar, V., Harms, H., Kuperjans, I. (2024): Optimization of the ex situ biomethanation of hydrogen and carbon dioxide in a novel meandering plug flow reactor: Start-up phase and flexible operation Bioengineering 11 (2), art. 165 10.3390/bioengineering11020165 |
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