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Coupled iron-microbial catalysis for CO 2 hydrogenation with multispecies microbial communities

Blanchet, Elise and Vahlas, Zoï and Etcheverry, Luc and Rafrafi, Yan and Erable, Benjamin and Délia, Marie-Line and Bergel, Alain Coupled iron-microbial catalysis for CO 2 hydrogenation with multispecies microbial communities. (2018) Chemical Engineering Journal, 346. 307-316. ISSN 1385-8947

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Official URL: http://doi.org/10.1016/j.cej.2018.03.191


The hydrogenation of carbon dioxide offers a large range of possible reactions for converting hydrogen to chemical compounds that can be easily stored, transported and used as fuels or platform molecules. In this study, CO2 hydrogenation was biocatalysed by multispecies microbial communities to produce formate, butyrate and acetate. A hybrid metal/microbial catalysis was pointed out in the presence of iron. Addition of FeCl3 10 mM increased the production of acetate by 265% and butyrate by 73%, to 5.26 and 14.19 g/L, respectively. A stable acetate production rate of 830 mg/L/d was thus sustained for more than 20 days. The presence of iron promoted the selection of Firmicutes and the best performances were linked to the growth of a restricted number of dominant species of two genera: Clostridium and Megasphaera. Various possible catalysis mechanisms are discussed and guidelines are proposed for further development and scale-up of the process.

Item Type:Article
HAL Id:hal-01840117
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:16 Jul 2018 11:11

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