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Oxidative Desulfurization Performance of CoAPO-5 Catalysts Synthesized by Novel Dynamic Hydrothermal Method

Abstract

CoAPO-5 molecular sieves were synthesized by a novel dynamic method. Crystallization, morphology and surface acidity were investigated by XRD, SEM, and Py-IR in details, and compared with samples prepared by traditional static method. Synthesis conditions, reaction time, temperature and the amount of catalyst were optimized as important parameters. The desulfurization performance of CoAPO-5 catalysts synthesized by two different methods was evaluated and compared. Also, some experiments were carried out to test selectivity and regenerability of CoAPO-5 catalysts synthesized by the dynamic method. Finally, ODS reaction kinetics and mechanism using CoAPO-5 was studied and discussed. Results indicated that dynamic method greatly shortened crystallization time, while kept the same structure and sulfur removal capacity of CoAPO-5. The dynamic synthesis method could be considered as an alternative method to prepare porous molecular sieves.

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ACKNOWLEDGMENTS

This work is supported by National Natural Science Foundation of China (21706017), Natural Science Foundation of Jiangsu Province (BK20150262), Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology (BM2012110).

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Correspondence to Hui Shao.

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Xueni Sun, Guan, W., Zheng, J. et al. Oxidative Desulfurization Performance of CoAPO-5 Catalysts Synthesized by Novel Dynamic Hydrothermal Method. Russ. J. Phys. Chem. 93, 2613–2619 (2019) doi:10.1134/S0036024419130284

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Keywords:

  • dynamic method
  • static method
  • CoAPO-5 molecular sieves
  • catalysis
  • oxidative desulfurization