Abstract

MFI and MEL zeolites with different crystal sizes and close Si/Al ratios were synthesized by hydrothermal crystallization. The crystal size was controlled by tuning the template content in the reaction mixture. The resultant zeolites were coated with Pt (1 wt %) by incipient wetness impregnation. The catalytic performance of the catalysts prepared was evaluated in n-hexadecane dewaxing. Zeolites Pt-MEL and Pt-MFI with larger crystals exhibit lower catalytic activity due to diffusion limitations. The crystal size, as well as the structure of the zeolite (MEL or MFI), do not significantly affect the product distribution in the n-hexadecane dewaxing reaction.

中文翻译：

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晶体尺寸对 MEL 和 MFI 沸石在正十六烷脱蜡中催化性能的影响

摘要

通过水热结晶法合成了具有不同晶体尺寸和接近 Si/Al 比的 MFI 和 MEL 沸石。通过调整反应混合物中的模板含量来控制晶体尺寸。所得沸石通过初湿浸渍用Pt(1重量％)涂覆。在正十六烷脱蜡中评价了制备的催化剂的催化性能。由于扩散限制，具有较大晶体的沸石 Pt-MEL 和 Pt-MFI 表现出较低的催化活性。晶体尺寸以及沸石（MEL 或 MFI）的结构不会显着影响正十六烷脱蜡反应中的产物分布。