| Summary: | By utilizing the CO2as feedstock to produce useful chemicals or fuels is an appealing method to diminish the amount of CO2in the atmosphere. To resolve our current environmental issues, the development of low energy, high efficiency, biodegradable and sustainable CO2reduction technology is necessary. The utilization of enzymes for catalyzing CO2transformation has been gaining attention since the enzymes are known to have high selectivity and specificity towards its substrate compared to most of the chemical or metal-based catalysts existed. One of the most well-known biocatalytic pathway that have been found by researchers is the multi-enzymatic CO2reduction, which involves formate dehydrogenase (FDH), formaldehyde dehydrogenase (FaldDH) and alcohol dehydrogenase (ADH), and also the aid of the reduced nicotinamide adenine dinucleotide (NADH) oxidation. The enzyme membrane reactor (EMR) system would be compatible with the multi-enzymatic reaction due to the involvement of membrane, which can act both as catalytic unit, and also contactor to retain enzymes inside the system. Among the existing membrane supports, polymeric membranes have been widely employed in consequence of their excellent mechanical stability, high availability, low costs and high biocompatibility properties. However, the biocatalytic reaction can still be hindered by the slow CO2hydration and mass transfer in the aqueous reaction solution. In this paper, several techniques to improve the interaction between CO2and polymeric membranes (such as by introducing nanocellulose (NC), graphene oxide (GO), ionic liquids (ILs), and amines components in the membrane) shall be reviewed and discussed so that it could be applied for the future enzyme membrane reactor systems to capture, hydrate, and further convert the CO2into chemicals. © 2023 Elsevier Ltd. All rights reserved.
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