Thermophilic bio-electro CO2 recycling into organic compounds
dc.contributor.author
dc.date.accessioned
2020-07-07T10:07:05Z
dc.date.available
2020-07-07T10:07:05Z
dc.date.issued
2020-04-24
dc.identifier.issn
1463-9262
dc.identifier.uri
dc.description.abstract
Many industrial combustion processes produce carbon dioxide (CO2) at high temperature, which may be electrically recycled into valuable chemicals using microorganisms as catalysts. However, little attention has been paid to handle the remaining heat of these processes as an alternative to increase CO2 fixation and production rates. Thus, this study was aimed at steering electro bio-CO2 recycling into organic compounds under thermophilic conditions. A mesophilic anaerobic sludge was adapted in lab-scale reactors at 50 °C, developing a resilient biocathode. High amounts of acetate (5250 mg L−1) were accumulated during a long-term operation period (150 days). The maximum production rate was 28 g acetate per m2 per d, with columbic efficiencies over 80%. In terms of carbon (C) conversion, 0.31 kg of C as acetate were obtained per 1 kg of C as CO2 inlet, with an energy demand of 24 kW h per 1 kg of acetate. Thermoanaerobacterales appeared to dominate the cathodic chambers, though they were compartmentalized by distinct bacterial communities in the electrode biofilm compared to the bulk liquid. This research delves into the sustained ability of a mixed microbial culture to electrochemically produce organic compounds at 50 °C and considers the possibility of using CO2-saturated effluents from industrial heated point sources to bring the technology closer to its scale-up.
dc.description.sponsorship
This study has received funding from the European Union’s
Horizon 2020 research and innovation program under the
grant agreement no. 760431. L. R.-A. acknowledges the support
from the Catalan Government (2018 FI-B 00347) in the European FSE program (CCI 2014ES05SFOP007). E. P.-V. is grateful for the Research Training grant from the University of
Girona (IFUdG2018/52). S. P. is a Serra Húnter Fellow
(UdG-AG-575) and acknowledges the funding from the ICREA
Acadèmia award. LEQUIA and IEA have been both recognized
as consolidated research groups by the Catalan Government
(2017-SGR-1552 and 2017-SGR-548)
dc.format.extent
9 p.
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Royal Society of Chemistry (RSC)
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.1039/D0GC00320D
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Green Chemistry, 2020, vol. 22, núm. 9, p. 2947-2955
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Articles publicats (D-EQATA)
dc.rights
Reconeixement-NoComercial 4.0 Internacional
dc.rights.uri
dc.source
Rovira Alsina, Laura Perona Vico, Elisabet Bañeras Vives, Lluís Colprim Galceran, Jesús Balaguer i Condom, Maria Dolors Puig Broch, Sebastià 2020 Thermophilic bio-electro CO2 recycling into organic compounds Green Chemistry 22 9 2947 2955
dc.subject
dc.title
Thermophilic bio-electro CO2 recycling into organic compounds
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.relation.projectID
info:eu-repo/grantAgreement/EC/H2020/760431/EU/Biological routes for CO2 conversion into chemical building blocks/BioRECO2VER
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
031680
dc.type.peerreviewed
peer-reviewed
dc.relation.FundingProgramme
dc.relation.ProjectAcronym
dc.identifier.eissn
1463-9270