文章基本信息

标题：A Sustainable Chemicals Manufacturing Paradigm Using CO 2 and Renewable H 2
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作者：Rajesh Reddy Bommareddy ; Yanming Wang ; Nicole Pearcy 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2020
卷号：23
期号：6
页码：1-32
DOI：10.1016/j.isci.2020.101218
语种：English
出版社：Elsevier
摘要：SummaryThe chemical industry must decarbonize to align with UN Sustainable Development Goals. A shift toward circular economies makes CO2an attractive feedstock for producing chemicals, provided renewable H2is available through technologies such as supercritical water (scH2O) gasification. Furthermore, high carbon and energy efficiency is paramount to favorable techno-economics, which poses a challenge to chemo-catalysis. This study demonstrates continuous gas fermentation of CO2and H2by the cell factory,Cupriavidus necator, to (R,R)-2,3-butanediol and isopropanol as case studies. Although a high carbon efficiency of 0.75 [(C-mol product)/(C-mol CO2)] is exemplified, the poor energy efficiency of biological CO2fixation requires ∼8 [(mol H2)/(mol CO2)], which is techno-economically infeasible for producing commodity chemicals. Heat integration between exothermic gas fermentation and endothermic scH2O gasification overcomes this energy inefficiency. This study unlocks the promise of sustainable manufacturing using renewable feedstocks by combining the carbon efficiency of bio-catalysis with energy efficiency enforced through process engineering.Graphical AbstractDisplay OmittedHighlights•Stable and continuous gas fermentation usingC. necator•Carbon-efficient bio-catalysis from CO2and H2to commodity chemicals•Heat integration overcomes energy inefficiency of biological CO2fixationChemical Engineering; Process Engineering; Metabolic Engineering