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《Chinese Journal of Catalysis》 2002-02
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Preliminary Study on Enzymatic Conversion of Carbon Dioxide to Methanol by Sol-Gel Encapsulation

JIANG Zhongyi 1,2 , WU Hong 2* , XU Songwei 2, HUANG Shufang 2, XIE Qing 2 (1 State Key Laboratory of C1 Chemical Technology, College of Chemical Engineering, Tianjin University, Tianjin 300072, China; 2 College of Chemical Engineering, Tianj  
In order to explore the new approaches for immobilizing and utilizing carbon dioxide, the greenhouse gas, the modified sol gel process was employed to co immobilize formate dehydrogenase, formaldehyde dehydrogenase and alcohol dehydrogenase using tetraethyl orthosilicate as the precursor. The enzymatic conversion of carbon dioxide to methanol was realized under low temperature and low pressure with the three encapsulated enzymes as the catalysts and NADH as the electron donor. The effects of the reaction temperature, pH, amounts of enzymes and NADH on the yield of methanol were preliminarily investigated. The highest yield of methanol is up to 92 4%. The gel immobilized enzymes show a little lower activity than the free enzymes under the same reaction conditions. This is due to the minor conformation change of enzymes and the existence of steric hindrance.
【Fund】: 国家自然科学基金资助项目 (2 0 1760 3 9)
【CateGory Index】: O643.3
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