TY - JOUR
T1 - Flue-to-fuel: Bio-integrated carbon capture and utilization of dilute carbon dioxide gas streams to renewable methane.
AU - Sieborg, Mads Ujarak
AU - Santos Oliveira, Jean Maikon
AU - Ottosen, Lars Ditlev Mørck
AU - Kofoed, Michael Vedel Wegener
PY - 2024/1/18
Y1 - 2024/1/18
N2 - Capturing carbon dioxide (CO
2) from flue gases and utilizing it as a feedstock for the production of renewable chemicals and fuels has been identified as an essential step toward mitigating climate change. Conventional CO
2 capture technologies, such as amine scrubbing, are impeded by their high energy demand due to the thermodynamically low driving force for desorbing CO
2. A new concept is presented here that combines carbon capture with power-to-methane: Bio-integrated carbon capture and utilization (BICCU). It exploits the robustness of microbial catalysts to simultaneously desorb the CO
2 from an amine-based absorbent and convert the captured CO
2 to synthetic natural gas (CH
4) in a single step using renewable hydrogen. Experimental results in batch reactors with synthetic flue gas and raw flue gas from a biogas engine demonstrate high microbial biocompatibility with amine methyl diethanolamine (MDEA), high microbial robustness towards impurities and oxygen in raw flue gas, and almost full bioavailability of the absorbed CO
2 until 120 mM of MDEA.
AB - Capturing carbon dioxide (CO
2) from flue gases and utilizing it as a feedstock for the production of renewable chemicals and fuels has been identified as an essential step toward mitigating climate change. Conventional CO
2 capture technologies, such as amine scrubbing, are impeded by their high energy demand due to the thermodynamically low driving force for desorbing CO
2. A new concept is presented here that combines carbon capture with power-to-methane: Bio-integrated carbon capture and utilization (BICCU). It exploits the robustness of microbial catalysts to simultaneously desorb the CO
2 from an amine-based absorbent and convert the captured CO
2 to synthetic natural gas (CH
4) in a single step using renewable hydrogen. Experimental results in batch reactors with synthetic flue gas and raw flue gas from a biogas engine demonstrate high microbial biocompatibility with amine methyl diethanolamine (MDEA), high microbial robustness towards impurities and oxygen in raw flue gas, and almost full bioavailability of the absorbed CO
2 until 120 mM of MDEA.
KW - Amine scrubbing
KW - BICCU
KW - Biomethanation
KW - Flue gas
KW - Integrated carbon capture and utilization
KW - Methanogens
UR - http://www.scopus.com/inward/record.url?scp=85182993853&partnerID=8YFLogxK
U2 - 10.1016/j.enconman.2024.118090
DO - 10.1016/j.enconman.2024.118090
M3 - Journal article
SN - 0196-8904
VL - 302
JO - Energy Conversion and Management
JF - Energy Conversion and Management
M1 - 118090
ER -