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Accelerating CO2 Absorption in Aqueous Amine Solutions at High Temperature with Carbonic Anhydrase in Magnetic Nanogels

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Abstract

We report a facile method for encapsulation of carbonic anhydrase (CA) with magnetic nanogel (MNP-CA nanogel), in which amino and vinyl groups are first grafted onto the surface of magnetic Fe3O4 nanoparticles (MNP) using 3-aminopropyltriethoxysilane (APTES) and N-acryloylsuccinimide (NAS), followed by CA attachment with glutaraldehyde and in situ polymerization with acrylamide. The MNP-CA nanogel shows much improved thermostability at elevated temperatures, e.g. staying unchanged at 60 °C for 80 min, owing to multiple linkage with the hydrophilic polymer network coated at the MNP surface. Addition of the MNP-CA nanogel into a methyldiethanolamine (MDEA) solution at an ultralow mass ratio (1:104) is able to enhance the CO2 absorption rate at 60 °C by 1.45 fold. The CA-enhanced mass transport of the absorbate has been demonstrated in a wetted-wall column, in which the MNP-CA nanogel increases the total mass transfer coefficient in the gas phase (KG) by 4.61 fold compared with that determined in the MDEA solution. The greatly increased absorption performance and much enhanced stability make MNP-CA nanogel appealing for industrial applications.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant No. 21520102008. The authors are grateful for the supports from Dr. Weiliang Luo and Dr. Yifei Zhang at Department of Chemical Engineering, Tsinghua University for their generous help in the preparation of MNP-CA nanogel and CO2 absorption.

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Authors and Affiliations

  1. Key Lab of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China

    Weina Xu, Zheyu Wang, Gong Chen, Zhongwang Fu, Guoqiang Jiang & Zheng Liu

  2. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China

    Jian Chen

  3. Department of Chemical and Environmental Engineering, University of California, Riverside, CA, 92521, USA

    Jianzhong Wu

  4. Jiangsu National Synthetic Innovation Centre for Advanced Materials, Nanjing, 211800, China

    Zheng Liu

Authors
  1. Weina Xu
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  2. Zheyu Wang
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  3. Gong Chen
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  4. Zhongwang Fu
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  5. Guoqiang Jiang
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  6. Jian Chen
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  7. Jianzhong Wu
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  8. Zheng Liu
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Correspondence to Zheng Liu.

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Electronic supplementary material

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10562_2018_2401_MOESM1_ESM.docx

Methods, SEM image of MNP-CA nanogel, DLS data of MNP-CA nanogel, XRD of MNP-CA nanogel and MNP, Hysteresis loop data of MNP and MNP-CA nanogel, CD spectra of CA and MNP-CA nanogel, the overall flow diagram of wetted-wall column. (DOCX 1023 KB)

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Xu, W., Wang, Z., Chen, G. et al. Accelerating CO2 Absorption in Aqueous Amine Solutions at High Temperature with Carbonic Anhydrase in Magnetic Nanogels. Catal Lett 148, 1827–1833 (2018). https://doi.org/10.1007/s10562-018-2401-9

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  • DOI: https://doi.org/10.1007/s10562-018-2401-9

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