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The tubular baffled reactor and its potential for the biological methanation of carbon dioxide

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  • Savvas, Savvas
  • Gangappa, Rajkumar
  • Ni, Xiong-Wei
  • Davies, William
  • Barton, William
  • Thomason, Mark
  • Patterson, Tim
  • Esteves, Sandra R.

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.

Suggested Citation

  • Savvas, Savvas & Gangappa, Rajkumar & Ni, Xiong-Wei & Davies, William & Barton, William & Thomason, Mark & Patterson, Tim & Esteves, Sandra R., 2024. "The tubular baffled reactor and its potential for the biological methanation of carbon dioxide," Renewable Energy, Elsevier, vol. 232(C).
    • Handle: RePEc:eee:renene:v:232:y:2024:i:c:s0960148124011212
    DOI: 10.1016/j.renene.2024.121053
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    Keywords

    Methanation; Power-to-Methane; CO2; Plug-flow; Hydrogenotrophic;
    All these keywords.

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