Coupled iron-microbial catalysis for CO2 hydrogenation with multispecies microbial communities

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- 바이오정밀화학
  1. 용매
  2. 연료
- 화장품용 기능성소재
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  2. 식품첨가제

논문

Coupled iron-microbial catalysis for CO2 hydrogenation with multispecies microbial communities

학술지

Chemical engineering journal

저자명

Blanchet, Elise; Vahlas, Zoï Etcheverry, Luc; Rafrafi, Yan; Erable, Benjamin; Dé lia, Marie-Line; Bergel, Alain

초록

Abstract 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. Highlights <UL> <LI> Multispecies microbial consortia catalyse CO2 hydrogenation. </LI> <LI> Iron ions at a few mM concentration considerably enhanced the microbial catalysis. </LI> <LI> Both the final concentration of the products and the production rates were increased. </LI> <LI> High production rate was sustained for weeks without product extraction or pH control. </LI> <LI> Iron enhanced the selection of the two microbial genera Clostridium and Megasphaera. </LI> </UL>

발행연도

2018

발행기관

Elsevier

ISSN

1385-8947

권

346

페이지

pp.307-316

DOI

10.1016/j.cej.2018.03.191