Abstract
The biological Power to Methane process (PtM) is gaining ground as an answer to the long-term renewable energy storage problem. Methane is an efficient hydrogen carrier, has an established worldwide transport infrastructure and can serve as a link between renewable power generation and a circular carbon economy. One of the defining factors regarding the scalability of the PtM process is the design of the reactor as it can determine the production rate/energy expenditure ratio. The tubular baffled reactor, a popular reactor design within the chemical industry has been assessed in the present study as a biomethanation reactor for the first time. The experiments were conducted with mixed cultures and the results point to high gas-liquid mass transfer capabilities as indicated by the methanation rates achieved (>90 % CH4 at 270 L/L/d mixed gas input rate). The gas/liquid flow ratio appears to have a stronger effect on methanation than the gas residence time. The working length of the reactor determines the pressure drop experienced by the culture, with higher pressure drops showing a negative correlation to methanogenesis.
Original language | English |
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Article number | 121053 |
Journal | Renewable Energy |
Volume | 232 |
Early online date | 20 Jul 2024 |
DOIs | |
Publication status | Published - Oct 2024 |
Keywords
- CO
- Hydrogenotrophic
- Methanation
- Plug-flow
- Power-to-Methane
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment