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Hierarchical ZSM‐5 zeolites with micro‐, meso‐ and macroporosity were prepared from diatomite zeolitization through a vapor‐phase transport process on solid surfaces. The aromatization performance of the catalysts was investigated on a fixed bed reactor by using FCC gasoline as feedstock. The crystal phase, morphology, pore structures, acidity and coke depositions of the hierarchical ZSM‐5 zeolites were characterized by means of X‐ray diffraction (XRD), scanning electron microscope (SEM), N2 adsorption/desorption, Fourier transform infrared (FT‐IR) and thermogravimetry‐mass spectrogram (TG‐MS), respectively. The results show that the prepared hierarchical ZSM‐5 zeolite possesses excellent porosity and high crystallinity, displaying an improved aromatization performance and carbon deposition resistance due to its meso‐ and macroporous structures. 相似文献
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