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Production of Middle Distillate Through Hydrocracking of Paraffin Wax Over NiMo/SiO2-Al2O3 Catalysts: Effect of Solvent in the Preparation of SiO2-Al2O3 by a Sol–Gel Method

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Abstract

SiO2-Al2O3 supports were prepared by a sol–gel method in the presence of distilled water and ethanol, respectively (SiO2-Al2O3 supports were donated as H-SA and E-SA, respectively). NiMo/SiO2-Al2O3 catalysts (NiMo/H-SA and NiMo/E-SA) were then prepared by an impregnation method for use in the production of middle distillate (C10–C20) through hydrocracking of paraffin wax. The effect of solvent in the preparation of SiO2-Al2O3 support on the catalytic performance of NiMo/SiO2-Al2O3 catalyst was investigated. NiMo/H-SA catalyst showed a higher conversion of wax and a higher selectivity for middle distillate than NiMo/E-SA catalyst. The identity of solvent strongly affected the physical properties of H-SA and E-SA supports. High surface area of H-SA enhanced the dispersion of impregnated metal species, resulting in the increase of active sites of NiMo/H-SA catalyst. Large pore volume and large pore diameter of NiMo/H-SA catalyst played an important role in enhancing internal mass transfer during the reaction. Large acidity of NiMo/H-SA catalyst compared to NiMo/E-SA catalyst was responsible for high conversion of wax over NiMo/H-SA catalyst. The enhanced selectivity for middle distillate over NiMo/H-SA catalyst was attributed to abundant active sites for hydrogenation reaction.

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Acknowledgments

The authors would like to acknowledge funding from the Korea Ministry of Knowledge Economy (MKE) through “Energy Technology Innovation Program”.

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Authors and Affiliations

  1. School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Shinlim-dong, Kwanak-ku, Seoul, 151-744, South Korea

    Sunhwan Hwang, Joongwon Lee, Jeong Gil Seo, Dong Ryul Park, Min Hye Youn, Ji Chul Jung & In Kyu Song

  2. Korea Research Institute of Chemical Technology, Daejeon, 305-600, South Korea

    Sang-Bong Lee

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  1. Sunhwan Hwang
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  2. Joongwon Lee
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  3. Jeong Gil Seo
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  4. Dong Ryul Park
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  7. Sang-Bong Lee
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Correspondence to In Kyu Song.

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Hwang, S., Lee, J., Seo, J.G. et al. Production of Middle Distillate Through Hydrocracking of Paraffin Wax Over NiMo/SiO2-Al2O3 Catalysts: Effect of Solvent in the Preparation of SiO2-Al2O3 by a Sol–Gel Method. Catal Lett 132, 410–416 (2009). https://doi.org/10.1007/s10562-009-0166-x

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  • DOI: https://doi.org/10.1007/s10562-009-0166-x

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