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Study on the Performance of Oxidative Diesel Desulfurization Catalyzed by Bioenzyme/γ-Al2O3 Spheres |
Shuang JIN,Yun-song YANG,Jin-hua LIANG,Xiao-rui YANG,Xiao-tong LI,Jian-liang ZHU*() |
College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China |
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Abstract The bioenzymes were loaded on the γ-Al2O3 spherical carrier by adsorption method, and the bioenzymes/γ-Al2O3 and the carrier were characterized by scanning electron microscopy (SEM), specific surface area analysis (BET), Fourier infrared spectroscopy (FT-IR) and circular dichroism (CD). The results showed that the bioenzymes were adsorbed on the carriers. The prepared bioenzyme/γ-Al2O3 catalyzed oxidative desulfurization of real diesel fuel, and the effects of reaction temperature, reaction flow rate and enzyme solution concentration on the desulfurization effect of real diesel fuel were investigated, and qualitative and quantitative analyses of the desulfurization effect were performed; further response surface design optimization of the desulfurization process conditions was carried out to find out the optimal reaction conditions. The experimental results showed that the optimum desulfurization rate of 93.16% was derived from the reaction temperature of 49℃, reaction flow rate of 1.0 mL/min and enzyme solution concentration of 15.5% (enzyme loading of 28.13 g). Finally, the performance of the immobilized enzyme was investigated for repeated use, and the activity of the catalyst did not decrease significantly after seven uses, indicating that the immobilized enzyme is effective in catalyzing oxidative diesel desulfurization and has potential application value.
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Received: 10 June 2022
Published: 04 November 2022
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Corresponding Authors:
Jian-liang ZHU
E-mail: jlzhu@njtech.edu.cn
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