Selective butyric acid production from CO_(2)and its upgrade to butanol in microbial electrosynthesis cells
作者机构：Institute of the EnvironmentUniversity of Girona.Campus MontiliviCarrer Maria Aurélia Capmany 69E-17003GironaSpain Molecular Microbial Ecology GroupInstitute of Aquatic EcologyUniversity of GironaMaria Aurelia Capmany 4017003GironaSpain WetsusEuropean Centre of Excellence for Sustainable Water TechnologyOostergoweg 98911MALeeuwardenthe Netherlands
出 版 物：《Environmental Science and Ecotechnology》 (环境科学与生态技术（英文）)
年 卷 期：2024年第17卷第1期
页 面：119-127页
核心收录：
基 金：This research was carried out in the project“PANGEA-Process intensificAtioN for bioelectroCO2 recyclinG into carbon-nEutrAl products)funded by the Spanish Ministry of Innovation and Science(ref.PID2021-126240OB-I00) PD is supported by the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement,project ATMESPHERE,No 101029266 MR-C is grateful for the support of the Spanish Government(FPU20/01362) S.P.is a Serra Hunter Fellow(UdG-AG-575)and acknowledges the funding from the ICREA Academia award.LF-P is grateful for the Research Training grant from the Catalan Government(2021 FISDU 00132) LEQUIA and EcoAqua have been recognized by the Catalan Government(Ref 2021 SGR01352 and 2021 SGR01142)
主 题：Biocathode Bioelectrochemical system Chain elongation Hydrogen partial pressure Megasphaera
摘 要：Microbial electrosynthesis(MES)is a promising carbon utilization technology,but the low-value products(i.e.,acetate or methane)and the high electric power demand hinder its industrial *** this study,electrically efficient MES cells with a low ohmic resistance of 15.7 mU m^(2)were operated galvanostatically in fed-batch mode,alternating periods of high CO_(2)and H2 *** promoted acetic acid and ethanol production,ultimately triggering selective(78%on a carbon basis)butyric acid production via chain *** average production rate of 14.5 g m^(-2)d^(-1)was obtained at an applied current of 1.0 or 1.5 mA cm^(-2),being Megasphaera *** key chain elongating *** a second cell with the catholyte containing the enriched community resulted in butyric acid production at the same rate as the previous cell,but the lag phase was reduced by 82%.Furthermore,interrupting the CO_(2)feeding and setting a constant pH2 of 1.7e1.8 atm in the cathode compartment triggered solventogenic butanol production at a pH below *** efficient cell design resulted in average cell voltages of 2.6e2.8 V and a remarkably low electric energy requirement of 34.6 kWhel kg1 of butyric acid produced,despite coulombic efficiencies being restricted to 45%due to the cross-over of O_(2)and H2 through the *** conclusion,this study revealed the optimal operating conditions to achieve energy-efficient butyric acid production from CO_(2)and suggested a strategy to further upgrade it to valuable butanol.
维普期刊数据库
