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Issue 47, 2018, Issue in Progress
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Enhanced bioconversion of hydrogen and carbon dioxide to methane using a micro-nano sparger system: mass balance and energy consumption

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Abstract

Simultaneous CO2 removal with renewable biofuel production can be achieved by methanogens through conversion of CO2 and H2 into CH4. However, the low gas–liquid mass transfer (kLa) of H2 limits the commercial application of this bioconversion. This study tested and compared the gas–liquid mass transfer of H2 by using two stirred tank reactors (STRs) equipped with a micro-nano sparger (MNS) and common micro sparger (CMS), respectively. MNS was found to display superiority to CMS in methane production with the maximum methane evolution rate (MER) of 171.40 mmol/LR/d and 136.10 mmol/LR/d, along with a specific biomass growth rate of 0.15 d−1 and 0.09 d−1, respectively. Energy analysis indicated that the energy-productivity ratio for MNS was higher than that for CMS. This work suggests that MNS can be used as an applicable resolution to the limited kLa of H2 and thus enhance the bioconversion of H2 and CO2 to CH4.

Graphical abstract: Enhanced bioconversion of hydrogen and carbon dioxide to methane using a micro-nano sparger system: mass balance and energy consumption

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Publication details

The article was received on 05 Apr 2018, accepted on 30 May 2018 and first published on 25 Jul 2018


Article type: Paper
DOI: 10.1039/C8RA02924E
Citation: RSC Adv., 2018,8, 26488-26496
  • Open access: Creative Commons BY-NC license
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    Enhanced bioconversion of hydrogen and carbon dioxide to methane using a micro-nano sparger system: mass balance and energy consumption

    Y. Liu, Y. Wang, X. Wen, K. Shimizu, Z. Lei, M. Kobayashi, Z. Zhang, I. Sumi, Y. Yao and Y. Mogi, RSC Adv., 2018, 8, 26488
    DOI: 10.1039/C8RA02924E

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