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Article Dans Une Revue Microporous and Mesoporous Materials Année : 2020

Intra-crystalline mesoporous ZSM-5 zeolite by grinding synthesis method

Xiaohui Wang
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Zhengxing Qin
Xinmei Liu

Résumé

ZSM-5 zeolite with intra-crystalline mesopores was synthesized via grinding synthesis method (GSM). It was found that the formation of the mesopores in the ZSM-5 crystals is due to the difference between the speed of crystallization and dissolution processes occurring during the GSM synthesis. The alkalinity of the precursor gels tailored the formation of the mesoporous structure and the crystal size of the ZSM-5 zeolite. The most regular mesopores in the ZSM-5 crystals were formed under grinding synthesis of the precursor gel with a defined concentration of alkali cations (Na2O/SiO2=0.113). The size of the mesopores in the ZSM-5 crystals varied from 2 3nm to 25nm, while the size of the individual ZSM-5 crystallites is in the range of 50-300nm which depend mainly on the amount of NaOH in the precursor gel.
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hal-03016617 , version 1 (27-11-2020)

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Yu Gu, Xiaohui Wang, Zhengxing Qin, Svetlana Mintova, Xinmei Liu. Intra-crystalline mesoporous ZSM-5 zeolite by grinding synthesis method. Microporous and Mesoporous Materials, 2020, 306, pp.110437. ⟨10.1016/j.micromeso.2020.110437⟩. ⟨hal-03016617⟩
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