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Accelerating CO.sub.2 Absorption in Aqueous Amine Solutions at High Temperature with Carbonic Anhydrase in Magnetic Nanogels

Catalysis letters, 2018-07, Vol.148 (7), p.1827 [Peer Reviewed Journal]

COPYRIGHT 2018 Springer ;ISSN: 1011-372X ;EISSN: 1572-879X ;DOI: 10.1007/s10562-018-2401-9

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  • Title:
    Accelerating CO.sub.2 Absorption in Aqueous Amine Solutions at High Temperature with Carbonic Anhydrase in Magnetic Nanogels
  • Author: Xu, Weina ; Wang, Zheyu ; Chen, Gong ; Fu, Zhongwang ; Jiang, Guoqiang ; Chen, Jian ; Wu, Jianzhong
  • Subjects: Polymer crosslinking
  • Is Part Of: Catalysis letters, 2018-07, Vol.148 (7), p.1827
  • Description: 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 Fe.sub.3O.sub.4 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 (1:10.sup.4) is able to enhance the CO.sub.2 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 (K.sub.G) 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. Graphical
  • Publisher: Springer
  • Language: English
  • Identifier: ISSN: 1011-372X
    EISSN: 1572-879X
    DOI: 10.1007/s10562-018-2401-9
  • Source: AUTh Library subscriptions: ProQuest Central
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