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Membrane electrolysis-assisted CO2 and H2S extraction as innovative pretreatment method for biological biogas upgrading

(2019) CHEMICAL ENGINEERING JOURNAL. 361. p.1479-1486
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Abstract
Turning raw biogas into biomethane as energy carrier requires the selective removal of CO2 in a biogas upgrading process or a total conversion of CO2 to CH4 which is generally energy intensive. During membrane electrolysis, electrical energy can be used to simultaneously remove CO2 (and H2S) and produce H-2 as side product. Biogas is thus scrubbed with catholyte and the captured HCO3- and HS-migrate towards the anode. Simultaneously, cathodic H-2 mixes with residual biogas in a ratio that can be fine-tuned. We obtained in one step an ideal 4:1 H-2:CO2 ratio in the reactor off gas. Subsequently the gas could be further upgraded via chemoautotrophic microbial conversion of CO2 to CH4. Biomethanation delivered biomethane with 98.9 +/- 0.9% purity. The electrochemically-assisted scrubbing and stripping of CO2 and H2S resulted in high CO2 removal efficiencies (up to 100%), without addition of chemicals. The system was flexible depending on temporarily available power. Electrochemical biogas upgrading (EBU) can be envisaged as a scalable and decentralized storage of excess or off-peak renewable power, making better use of the power input used to drive a biological CO2 conversion.
Keywords
Biomethane, Anion exchange membrane, Power-to-gas, Hydrogenotrophic methanogenesis, Biogas desulfurization, POWER-TO-GAS, OF-THE-ART, HYDROGEN UTILIZATION, MASS-TRANSFER, STATE, TECHNOLOGIES, KINETICS, RECOVERY, AMMONIA, METHANE

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MLA
Verbeeck, Kristof et al. “Membrane Electrolysis-assisted CO2 and H2S Extraction as Innovative Pretreatment Method for Biological Biogas Upgrading.” CHEMICAL ENGINEERING JOURNAL 361 (2019): 1479–1486. Print.
APA
Verbeeck, K., De Vrieze, J., Biesemans, M., & Rabaey, K. (2019). Membrane electrolysis-assisted CO2 and H2S extraction as innovative pretreatment method for biological biogas upgrading. CHEMICAL ENGINEERING JOURNAL, 361, 1479–1486.
Chicago author-date
Verbeeck, Kristof, Jo De Vrieze, Marie Biesemans, and Korneel Rabaey. 2019. “Membrane Electrolysis-assisted CO2 and H2S Extraction as Innovative Pretreatment Method for Biological Biogas Upgrading.” Chemical Engineering Journal 361: 1479–1486.
Chicago author-date (all authors)
Verbeeck, Kristof, Jo De Vrieze, Marie Biesemans, and Korneel Rabaey. 2019. “Membrane Electrolysis-assisted CO2 and H2S Extraction as Innovative Pretreatment Method for Biological Biogas Upgrading.” Chemical Engineering Journal 361: 1479–1486.
Vancouver
1.
Verbeeck K, De Vrieze J, Biesemans M, Rabaey K. Membrane electrolysis-assisted CO2 and H2S extraction as innovative pretreatment method for biological biogas upgrading. CHEMICAL ENGINEERING JOURNAL. 2019;361:1479–86.
IEEE
[1]
K. Verbeeck, J. De Vrieze, M. Biesemans, and K. Rabaey, “Membrane electrolysis-assisted CO2 and H2S extraction as innovative pretreatment method for biological biogas upgrading,” CHEMICAL ENGINEERING JOURNAL, vol. 361, pp. 1479–1486, 2019.
@article{8604329,
  abstract     = {{Turning raw biogas into biomethane as energy carrier requires the selective removal of CO2 in a biogas upgrading process or a total conversion of CO2 to CH4 which is generally energy intensive. During membrane electrolysis, electrical energy can be used to simultaneously remove CO2 (and H2S) and produce H-2 as side product. Biogas is thus scrubbed with catholyte and the captured HCO3- and HS-migrate towards the anode. Simultaneously, cathodic H-2 mixes with residual biogas in a ratio that can be fine-tuned. We obtained in one step an ideal 4:1 H-2:CO2 ratio in the reactor off gas. Subsequently the gas could be further upgraded via chemoautotrophic microbial conversion of CO2 to CH4. Biomethanation delivered biomethane with 98.9 +/- 0.9% purity. The electrochemically-assisted scrubbing and stripping of CO2 and H2S resulted in high CO2 removal efficiencies (up to 100%), without addition of chemicals. The system was flexible depending on temporarily available power. Electrochemical biogas upgrading (EBU) can be envisaged as a scalable and decentralized storage of excess or off-peak renewable power, making better use of the power input used to drive a biological CO2 conversion.}},
  author       = {{Verbeeck, Kristof and De Vrieze, Jo and Biesemans, Marie and Rabaey, Korneel}},
  issn         = {{1385-8947}},
  journal      = {{CHEMICAL ENGINEERING JOURNAL}},
  keywords     = {{Biomethane,Anion exchange membrane,Power-to-gas,Hydrogenotrophic methanogenesis,Biogas desulfurization,POWER-TO-GAS,OF-THE-ART,HYDROGEN UTILIZATION,MASS-TRANSFER,STATE,TECHNOLOGIES,KINETICS,RECOVERY,AMMONIA,METHANE}},
  language     = {{eng}},
  pages        = {{1479--1486}},
  title        = {{Membrane electrolysis-assisted CO2 and H2S extraction as innovative pretreatment method for biological biogas upgrading}},
  url          = {{http://dx.doi.org/10.1016/j.cej.2018.09.120}},
  volume       = {{361}},
  year         = {{2019}},
}

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