A Sustainable Chemicals Manufacturing Paradigm Using CO2 and Renewable H2

Rajesh Reddy Bommareddy; Yanming Wang; Nicole Pearcy; Martin Hayes; Edward Lester; Nigel P. Minton; Alex V. Conradie

doi:10.1016/j.isci.2020.101218

A Sustainable Chemicals Manufacturing Paradigm Using CO₂ and Renewable H₂

Rajesh Reddy Bommareddy^*, Yanming Wang, Nicole Pearcy, Martin Hayes, Edward Lester, Nigel P. Minton, Alex V. Conradie

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

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Abstract

The chemical industry must decarbonize to align with UN Sustainable Development Goals. A shift toward circular economies makes CO₂ an attractive feedstock for producing chemicals, provided renewable H₂ is 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 CO₂ and H₂ by 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 CO₂ fixation 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.

Original language	English
Article number	101218
Pages (from-to)	101218
Journal	iScience
Volume	23
Issue number	6
Early online date	2 Jun 2020
DOIs	https://doi.org/10.1016/j.isci.2020.101218
Publication status	Published - 26 Jun 2020
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.isci.2020.101218Licence: CC BY-NC-ND

PIIS258900422030403XFinal published version, 4.49 MBLicence: CC BY-NC-ND

Cite this

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title = "A Sustainable Chemicals Manufacturing Paradigm Using CO2 and Renewable H2",

abstract = "The chemical industry must decarbonize to align with UN Sustainable Development Goals. A shift toward circular economies makes CO2 an attractive feedstock for producing chemicals, provided renewable H2 is 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 CO2 and H2 by 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 CO2 fixation 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.",

keywords = "Chemical Engineering, Metabolic Engineering, Process Engineering",

author = "Bommareddy, {Rajesh Reddy} and Yanming Wang and Nicole Pearcy and Martin Hayes and Edward Lester and Minton, {Nigel P.} and Conradie, {Alex V.}",

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AU - Bommareddy, Rajesh Reddy

AU - Wang, Yanming

AU - Pearcy, Nicole

AU - Hayes, Martin

AU - Lester, Edward

AU - Minton, Nigel P.

AU - Conradie, Alex V.

PY - 2020/6/26

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N2 - The chemical industry must decarbonize to align with UN Sustainable Development Goals. A shift toward circular economies makes CO2 an attractive feedstock for producing chemicals, provided renewable H2 is 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 CO2 and H2 by 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 CO2 fixation 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.

AB - The chemical industry must decarbonize to align with UN Sustainable Development Goals. A shift toward circular economies makes CO2 an attractive feedstock for producing chemicals, provided renewable H2 is 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 CO2 and H2 by 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 CO2 fixation 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.

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