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  • MgO-Li2O catalysts templated by a PDMS-PEO comb-like copolymer for transesterification of vegetable oil to biodiesel

    Author(s)
    Lu, Haitao
    Yu, Xinhai
    Yang, Shuang
    Yang, Huagui
    Tu, Shan-Tung
    Griffith University Author(s)
    Yang, Huagui
    Year published
    2016
    Metadata
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    Abstract
    In this study, MgO-Li2O catalysts were developed for biodiesel synthesis using poly(dimethylsiloxane-ethyleneoxide) PDMS-PEO as a structure-directing agent. The MgO-Li2O catalysts have a three-dimensional interconnected highly porous structure with bimodal pore distribution that enhances the transesterification reaction. Moreover, Li atoms are not accommodated by alternating MgO slabs within the growth regions; thus a Li exsolution is locally generated and gives rise to a unique morphology of hybrid MgO and Mg2SiO4 crystals loaded with the surface Li2O nanoparticles. The dispersed Li2O nanoparticles results in an increases ...
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    In this study, MgO-Li2O catalysts were developed for biodiesel synthesis using poly(dimethylsiloxane-ethyleneoxide) PDMS-PEO as a structure-directing agent. The MgO-Li2O catalysts have a three-dimensional interconnected highly porous structure with bimodal pore distribution that enhances the transesterification reaction. Moreover, Li atoms are not accommodated by alternating MgO slabs within the growth regions; thus a Li exsolution is locally generated and gives rise to a unique morphology of hybrid MgO and Mg2SiO4 crystals loaded with the surface Li2O nanoparticles. The dispersed Li2O nanoparticles results in an increases of strong basic sites. We found that the best catalyst of LM0.12-873 (Li/Mg molar ratio = 0.12, calcination temperature is 873 K) with the largest amount of strong basic sites has better catalytic activity and anti-leaching ability compared with other reported catalysts. The MgO-Li2O catalysts templated by a PDMS-PEO comb-like copolymer have a high potential for use in the large-scale biodiesel production.
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    Journal Title
    Fuel
    Volume
    165
    DOI
    https://doi.org/10.1016/j.fuel.2015.10.072
    Subject
    Physical chemistry
    Chemical engineering
    Mechanical engineering
    Science & Technology
    Energy & Fuels
    Engineering
    Publication URI
    http://hdl.handle.net/10072/413666
    Collection
    • Journal articles

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