Author
Listed:
- Peng Zhu
(Rice University)
- Zhen-Yu Wu
(Rice University)
- Ahmad Elgazzar
(Rice University)
- Changxin Dong
(Rice University)
- Tae-Ung Wi
(Rice University)
- Feng-Yang Chen
(Rice University)
- Yang Xia
(Rice University)
- Yuge Feng
(Rice University)
- Mohsen Shakouri
(University of Saskatchewan)
- Jung Yoon (Timothy) Kim
(Rice University)
- Zhiwei Fang
(Rice University)
- T. Alan Hatton
(Massachusetts Institute of Technology)
- Haotian Wang
(Rice University
Rice University
Rice University)
Abstract
Electrochemical carbon-capture technologies, with renewable electricity as the energy input, are promising for carbon management but still suffer from low capture rates, oxygen sensitivity or system complexity1–6. Here we demonstrate a continuous electrochemical carbon-capture design by coupling oxygen/water (O2/H2O) redox couple with a modular solid-electrolyte reactor7. By performing oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) redox electrolysis, our device can efficiently absorb dilute carbon dioxide (CO2) molecules at the high-alkaline cathode–membrane interface to form carbonate ions, followed by a neutralization process through the proton flux from the anode to continuously output a high-purity (>99%) CO2 stream from the middle solid-electrolyte layer. No chemical inputs were needed nor side products generated during the whole carbon absorption/release process. High carbon-capture rates (440 mA cm−2, 0.137 mmolCO2 min−1 cm−2 or 86.7 kgCO2 day−1 m−2), high Faradaic efficiencies (>90% based on carbonate), high carbon-removal efficiency (>98%) in simulated flue gas and low energy consumption (starting from about 150 kJ per molCO2) were demonstrated in our carbon-capture solid-electrolyte reactor, suggesting promising practical applications.
Suggested Citation
Peng Zhu & Zhen-Yu Wu & Ahmad Elgazzar & Changxin Dong & Tae-Ung Wi & Feng-Yang Chen & Yang Xia & Yuge Feng & Mohsen Shakouri & Jung Yoon (Timothy) Kim & Zhiwei Fang & T. Alan Hatton & Haotian Wang, 2023.
"Continuous carbon capture in an electrochemical solid-electrolyte reactor,"
Nature, Nature, vol. 618(7967), pages 959-966, June.
Handle:
RePEc:nat:nature:v:618:y:2023:i:7967:d:10.1038_s41586-023-06060-1
DOI: 10.1038/s41586-023-06060-1
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