Recent Advances in Carbon Dioxide Conversion: A Circular Bioeconomy Perspective

TsingHai Wang, Cheng-Di Dong, Jui-Yen Lin, Chiu-Wen Chen, Jo-Shu Chang, Hyunook Kim, Chin-Pao Huang and Chang-Mao Hung
Additional contact information
TsingHai Wang: Department of Chemical Engineering, Yuan Ze University, Taoyuan City 32003, Taiwan
Cheng-Di Dong: Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 811213, Taiwan
Jui-Yen Lin: Department of Chemical Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Chiu-Wen Chen: Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 811213, Taiwan
Jo-Shu Chang: Department of Chemical Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Hyunook Kim: School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
Chin-Pao Huang: Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USA
Chang-Mao Hung: Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 811213, Taiwan

Sustainability, 2021, vol. 13, issue 12, 1-31

Abstract: Managing the concentration of atmospheric CO 2 requires a multifaceted engineering strategy, which remains a highly challenging task. Reducing atmospheric CO 2 (CO2R) by converting it to value-added chemicals in a carbon neutral footprint manner must be the ultimate goal. The latest progress in CO2R through either abiotic (artificial catalysts) or biotic (natural enzymes) processes is reviewed herein. Abiotic CO2R can be conducted in the aqueous phase that usually leads to the formation of a mixture of CO, formic acid, and hydrogen. By contrast, a wide spectrum of hydrocarbon species is often observed by abiotic CO2R in the gaseous phase. On the other hand, biotic CO2R is often conducted in the aqueous phase and a wide spectrum of value-added chemicals are obtained. Key to the success of the abiotic process is understanding the surface chemistry of catalysts, which significantly governs the reactivity and selectivity of CO2R. However, in biotic CO2R, operation conditions and reactor design are crucial to reaching a neutral carbon footprint. Future research needs to look toward neutral or even negative carbon footprint CO2R processes. Having a deep insight into the scientific and technological aspect of both abiotic and biotic CO2R would advance in designing efficient catalysts and microalgae farming systems. Integrating the abiotic and biotic CO2R such as microbial fuel cells further diversifies the spectrum of CO2R.

Keywords: CO 2 conversions; abiotic processes; algal farming; biorefinery; circular bioeconomy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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