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Optimization of the mechanical properties of a hydrotreating catalyst in the impregnating and drying processes

Authors

  • Dongfang Wu,

    Corresponding author
    1. Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering, Southeast University, Jiangning District, Nanjing 211189, China
    • Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering, Southeast University, Jiangning District, Nanjing 211189, China
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  • Jiancheng Zhou,

    1. Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering, Southeast University, Jiangning District, Nanjing 211189, China
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  • Yongdan Li

    1. Tianjin Key Laboratory of Catalysis Science and Technology and State Key Laboratory for Chemical Engineering (Tianjin University), School of Chemical Engineering, Tianjin University, Tianjin 300072, China
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Abstract

The Taguchi method, a powerful tool to the optimization for quality, is used to improve the mechanical properties of a PCoMo/Al2O3 hydrotreating catalyst in the impregnating and drying processes. An orthogonal array is selected to analyze the effects of the process factors, i.e., impregnating temperature, impregnating time, drying temperature, and drying time. Through this study, not only can the main process factors that affect the mean strength and the Weibull modulus be found, but also the optimal factor levels can be obtained. Results show that the drying temperature is the most significant process factor affecting both the mean strength and the Weibull modulus. It has been shown that the mean strength, Weibull modulus, and mechanical reliability of the hydrotreating catalyst can be improved significantly with the optimization of the impregnating and drying process factors. Experimental results are also provided to confirm the effectiveness of the Taguchi method. © 2008 American Institute of Chemical Engineers AIChE J, 2008

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