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首页> 外文期刊>Crystal growth & design >Synthesis of Short, Needle-Shaped Crystals of TON-Type Zeolite by Addition of Inhibitors of Crystal Growth along the [001] Direction
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Synthesis of Short, Needle-Shaped Crystals of TON-Type Zeolite by Addition of Inhibitors of Crystal Growth along the [001] Direction

机译：通过加入沿[001]方向的晶体生长抑制剂来合成吨型沸石的短，针状晶体

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摘要

TON-type zeolite crystals in the shape of short needles were synthesized using inhibitors of crystal growth along the [001] direction. When fluoride was used as a mineralizer, bulky amines incorporating structure-directing agents acted as inhibitors, while nonionic surfactants were more effective as inhibitors for decreasing the crystal length of TON-type zeolite. The amount of surfactant adsorbed on the zeolite increased with the surface area of the face containing pore mouths. This indicates that the surfactant was trapped in the pore mouths to inhibit crystal growth along the long axis of the needle-shaped crystals. By microscopic observation of the crystals, we confirmed inhibition of crystal growth by adsorption of the surfactant. After adsorption of Nile red, a lipophilic stain that is intensely fluorescent in surfactants, on as-synthesized zeolite, only the edges of the needle-shaped crystals were luminous, also indicating adsorption of the surfactant in pore mouths. When hydroxide was used as a mineralizer, the bulky amines acted as inhibitors. Nonionic surfactants, however, did not work. We used the obtained shorter crystals of TON-type zeolites as catalysts for hydroisomerization of n-tetradecane. Use of the shorter crystals improved the selectivity for skeletal isomerization.
机译：使用沿着[001]方向的晶体生长的抑制剂合成短针形状的吨型沸石晶体。当氟化物被用作矿化器时，将庞大的胺掺入结构 - 引导剂的作用作用为抑制剂，而非离子表面活性剂作为抑制剂更有效地降低吨型沸石的晶体长度。吸附在沸石上的表面活性剂的量随含孔口的脸部的表面积而增加。这表明表面活性剂被困在孔口中以抑制沿着针状晶体的长轴抑制晶体生长。通过微观观察晶体，我们通过吸附表面活性剂确认了晶体生长的抑制。在吸附尼罗镍红色后，在合成的沸石上，在表面活性剂中强烈荧光的亲脂性染色，仅针对针状晶体的边缘是发光的，也表明表面活性剂在孔口中的吸附。当氢氧化物用作矿化器时，庞大的胺充当抑制剂。然而，非离子表面活性剂不起作用。我们使用了获得的吨型沸石的较短晶体作为N-四烷的氢代异构化的催化剂。使用较短的晶体改善了骨骼异构化的选择性。

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  • 来源
    《Crystal growth & design》 |2018年第11期|共8页
  • 作者

    Okamoto Masaki; Nishimura Yohei; Takahashi Miyuki; Chen Wei-Hung;

  • 作者单位

    Tokyo Inst Technol Sch Mat &

    Chem Technol Dept Chem Sci &

    Engn Meguro Ku Tokyo 1528552 Japan;

    Tokyo Inst Technol Sch Mat &

    Chem Technol Dept Chem Sci &

    Engn Meguro Ku Tokyo 1528552 Japan;

    Tokyo Inst Technol Sch Mat &

    Chem Technol Dept Chem Sci &

    Engn Meguro Ku Tokyo 1528552 Japan;

    Tokyo Inst Technol Sch Mat &

    Chem Technol Dept Chem Sci &

    Engn Meguro Ku Tokyo 1528552 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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