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Immobilization of LaW10 onto Ionic-Liquid-Modified Mesoporous Silica: Deep Desulfurization with Zero-Order Reaction Kinetics

Authors

  • Yang Chen,

    1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (P. R. China), Fax: (+86) 10-64431832
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  • Prof. Yu-Fei Song

    Corresponding author
    1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (P. R. China), Fax: (+86) 10-64431832
    • State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (P. R. China), Fax: (+86) 10-64431832

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Abstract

The polyoxometalate (POM) cluster Na7H2LaW10O36⋅32 H2O (denoted LaW10) is immobilized onto dihydroimidazolium-based ionic-liquid (IL)-modified mesoporous silica, resulting in the formation of a new catalyst: LaW10/IL-SiO2. Compared with other reported extractive catalytic oxidative desulfurization (ECODS) systems, LaW10/IL-SiO2 has the following advantages: 1) the heterogeneous catalyst LaW10/IL-SiO2 achieves deep desulfurization of dibenzothiophene (DBT), benzothiophene (BT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) in 25, 30, and 25 min, respectively, under mild conditions; 2) deep desulfurization of DBT follows zero-order reaction kinetics; 3) there is no need to add ionic liquid each time the catalyst is reused; 4) the catalyst can be separated easily by filtration and reused at least ten times without a decrease in catalytic efficiency. As such, LaW10/IL-SiO2 shows great potential for practical applications.

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