In this study, ZSM‐5, which is a Mobil‐type five‐type zeolite with well‐defined crystal morphology, is successfully synthesized via a seed‐assisted, liquid‐free method that uses iron ore tailings as a silica source. The ZSM‐5 crystallization kinetics at 423, 433, and 443 K and different synthesis times are investigated to identify the nucleation and crystallization mechanisms of the synthesized ZSM‐5 zeolites, and results suggest that the crystallization kinetics follow a Kolmogorov‐Johnson‐Mehl‐Avrami‐type behavior. The activation energies for the induction and transition periods are 112.38 and 58.35 kJ mol⁻¹, respectively. Furthermore, the Avrami exponent indicates three‐dimensional crystal growth from both sporadic and instantaneous nucleation mechanisms. A comparison of our results with previous reports of the ZSM‐5 crystallization mechanism demonstrates that the seed crystals play a significant role in nucleation and crystal growth. Finally, seed surface crystallization and new nuclei crystallization dual mechanism has been proposed to describe the crystallization process of ZSM‐5.

中文翻译：

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研究铁矿石尾矿中无液体，无OSDA的ZSM-5沸石的动力学

在这项研究中，ZSM-5是一种具有明确晶体形态的美孚（Mobil）型五型沸石，是通过使用铁矿石尾矿作为二氧化硅源的无种子辅助方法成功合成的。研究了在423、433和443 K以及不同合成时间下ZSM-5的结晶动力学，以确定合成的ZSM-5沸石的成核和结晶机理，结果表明结晶动力学遵循Kolmogorov-Johnson-Mehl- Avrami类型的行为。诱导期和过渡期的活化能为112.38和58.35 kJ mol ^-1， 分别。此外，Avrami指数表明了零星和瞬时成核机制的三维晶体生长。将我们的结果与以前的ZSM-5结晶机理报告进行比较，结果表明种晶在成核和晶体生长中起着重要作用。最后，提出了种子表面结晶和新的核结晶双重机理来描述ZSM-5的结晶过程。