Properties of Carbonic Anhydrase-Containing Active Coatings for CO2 Capture

Author:

Li Xiaobo123,Zhou Rui2,Yang Haoran2,Liang Zimu2,Yao Yuxiang3,Yu Zhipeng3,Du Mingsai2,Lou Diming1,Li Ke2

Affiliation:

1. Automotive Department, Tongji University, Shanghai 200092, China

2. Shanghai Marine Diesel Engine Research Institute, Shanghai 201108, China

3. Shanghai Qiyao Environmentally Technology Co., Ltd., Shanghai 200082, China

Abstract

Carbonic anhydrase (CA)-based biological CO2 capture is emerging as a prominent carbon capture and storage (CCS) technology. We developed a tagged CA–Ferritin chimera, resulting in a high-purity, high-activity, micrometer-sized CA aggregate, SazF, with a yield of 576.6 mg/L (protein/medium). SazF has an optimum temperature of 50 °C and demonstrates thermal stability between 40 and 60 °C. It operates efficiently in Tris–HCl buffer (pH = 8–9), making it compatible with ship exhaust conditions. For enhanced stability and reusability, SazF was encapsulated in SiO2 and integrated into an epoxy resin to produce a corrosion-active coating. This coating, applied to foam metal fillers, showed less than 3% protein leakage after ten days and retained over 70% activity after a month at 60 °C. This simple preparation method and the cost-effective production of these biomaterials that can continuously and efficiently absorb CO2 in high-temperature environments are suitable for most CO2 capture devices. They have a broad application prospect in the field of industrial carbon capture.

Funder

Chinese-European project entitled "Joint R&D on Key Technologies and Equipment for Efficient Carbon Dioxide Capture and Storage on Ships

Publisher

MDPI AG

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