Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (9): 1999.doi: 10.7503/cjcu20140059

• Physical Chemistry • Previous Articles     Next Articles

Bio-sequestration of CO2 Using Carbonic Anhydrase in situ Encapsulated Inside Electrospun Hollow Fibers

CUI Jiandong1,2, LI Ying1,2, JI Xiaoyuan2, BIAN Hongjie1, ZHANG Yufei2, SU Zhiguo2, MA Guanghui2, ZHANG Songping2,*   

  1. 1. College of Bioscience and Bioengineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
    2. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering,Chinese Academy of Sciences, Beijing 100190, China
  • Received:2014-01-17 Online:2014-09-10 Published:2019-08-01
  • Contact: ZHANG Songping
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.21376249, 21106164, 21072041) and the National Basic Research Program of China(No.2013CB733604)

Abstract:

Carbonic anhydrase catalyzed bio-sequestration of CO2 to form HCO3-, followed by trapping as solid CaCO3 is one of the most promising technologies for CO2 capturing. The effects of reaction condition on the CO2 hydration using free carbonic anhydrase were systematically investigated. In order to improve the stability of the enzyme and facility its recycling, the carbonic anhydrase was in situ encapsulated inside hollow fibers via a novel co-axial electrospinning technology. Compared with the free enzyme, the immobilized carbonic anhydrase showed much improved thermal stability and suffered much reduced inhibitory effects from cation ions, such as Cu2+ and Fe3+. After 11 reuses, the immobilized enzyme retained about 81.9% of its original activity by comparing the amount of formed CaCO3 precipitation. In the presence of immobilized carbonic anhydrase, both calcite and vaterite CaCO3 solid were formed; while in the absence of enzyme or with free carbonic anhydrase, only calcite CaCO3 was observed.

Key words: Carbonic anhydrase, CO2 Sequestration, Hollow fiber, Electrospinning, CaCO3

CLC Number: 

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