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combined Use of co-immobilized Lysozyme and Lipase and Chemical Inhibitors in Circulating cooling Water System

China Petroleum Processing & Petrochemical Technology 2018年第4期20卷 82-90页

作者： Jiang Guofei Chen Xiaorui Lu Xin Liu Fang Wang Yongqiang Zhao Chaocheng Sun Juan college of Chemical Engineering China University of PetroleumQingdao 266580 State Key Laboratory of Petroleum Pollution control Beijing 102206

In order to improve the stability and corrosion inhibition performance of bioenzyme, lipase and lsozyme were co-immobilized on the mesoporous molecular sieve MCM-41 by the adsorption method. Then the immobilized enzymes were combined with amino trimethylene phosphonic acid and polyaspartic acid to prevent corrosion caused by circulating cooling water. The weight-loss method and electrochemical techniques were used to evaluate the performance of composite inhibitors. The co-immobilized lysozyme and lipase achieved good inhibition effects. After they were combined with amino trimethylene phosphonic acid and polyaspartic acid, the corrosion inhibition properties were further improved. The inhibition efficiency was promoted to 94.4%. During the corrosion inhibition process, the immobilized enzymes played an important role. The addition of corrosion inhibitor could inhibit the anodic dissolution and cathodic hydrogen evolution process of carbon steel at the same time. The adsorption of co-immobilized lysozyme and lipase composite inhibitor on the steel surface was a joint action involving physical adsorption and chemical adsorption.

关键词： carbon steel electrochemical impedance spectroscopy potentiodynamic polarization co-immobilized lysozyme and lipase

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