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首页> 外文期刊>RSC Advances >Surfactant-assisted synthesis of Mo-V mixed oxide catalysts for upgraded one-step conversion of glycerol to acrylic acid
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Surfactant-assisted synthesis of Mo-V mixed oxide catalysts for upgraded one-step conversion of glycerol to acrylic acid

机译：表面活性剂辅助合成Mo-V混合氧化物催化剂，用于将甘油的一步转化为丙烯酸的单步转化

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摘要

The catalytic properties of Mo-V mixed oxides hydrothermally synthetized in the presence of ionic surfactants (SDS and CTAB) were investigated in the gas-phase oxidative dehydration of glycerol. The presence of surfactants promoted a change in morphology of MoV2O8 phase, directing to formation of rod-shaped crystals, and, consequently, an increase in macroporosity of materials, generated by intercrystallite spaces, when compared to a reference sample. Rod-like morphology stabilized the MoV2O8 mixed oxide phase during glycerol conversion, avoiding migration of vanadium from crystalline to amorphous phase, like observed in the reference sample, favoring the dynamic of reduction/reoxidation of vanadium and, consequently contributing to an increase in efficiency and stability of the catalyst. Both SDS and CTAB catalysts presented higher productivity of acrylic acid and good catalytic stability, with no coke formation and considerable decrease in COX evolution during 6 h of reaction. SDS presented the best catalytic results with 100% of conversion, 57% of acrylic acid selectivity and 36% of COX selectivity.
机译：沫-V混合氧化物的催化性能在离子表面活性剂（SDS和CTAB）在甘油的气相脱水的氧化进行了研究的存在水热合成。表面活性剂的存在促进了MOV2O8相的形态的变化，引导到杆状晶体的形成，并且因此，与参考样品相比，由晶状体空间产生的材料的大孔隙率的增加。棒状形态稳定在甘油转化过程中MOV2O8混合氧化物相，避免钒从结晶到无定形相的迁移，如在参考样品中观察到的，有利于钒的减少/再氧化的动态，从而有助于提高效率和增加效率催化剂的稳定性。 SDS和CTAB催化剂的丙烯酸和良好的催化稳定性均呈现出更高的生产率，在6小时内没有焦炭形成和COX演化的显着降低。 SDS呈现最佳催化结果，含有100％的转化率，57％的丙烯酸选择性和36％的COX选择性。

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  • 来源
    《RSC Advances》 |2018年第22期|共8页
  • 作者

    Rasteiro Leticia F.; Vieira Luiz H.; Santilli Celso V.; Martins Leandro;

  • 作者单位

    Univ Estadual Paulista Inst Quim UNESP Rua Prof Francisco Degni 55 BR-14800900 Araraquara SP Brazil;

    Univ Estadual Paulista Inst Quim UNESP Rua Prof Francisco Degni 55 BR-14800900 Araraquara SP Brazil;

    Univ Estadual Paulista Inst Quim UNESP Rua Prof Francisco Degni 55 BR-14800900 Araraquara SP Brazil;

    Univ Estadual Paulista Inst Quim UNESP Rua Prof Francisco Degni 55 BR-14800900 Araraquara SP Brazil;

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  • 正文语种 eng
  • 中图分类 化学;
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