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Combined alkali dissolution and re-assembly approach toward ZSM-5 mesostructures with extended lifetime in cumene cracking

Abstract : The basis and contribution of mesopores created in ZSM-5 structures at different treatment conditions are systematically investigated. The results reveal that the mesopores originated from the alkali dissolution of pristine ZSM-5 are mainly intracrystalline and they contribute to excessive Brønsted acid sites, while the mesopores originated from the re-assembly of alkali dissolved aluminosilicate species possess Lewis acid sites. These ZSM-5 mesostructures showed an extended lifespan during the cracking of cumene (88.0%) in comparison to the pristine ZSM-5 (27.0%) after 460 min. The zeolite mesostructures obtained in this study could be used as a base for further design of new porous materials with desired acidic properties.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-01873235
Contributor : Pascal Roland <>
Submitted on : Thursday, September 13, 2018 - 9:18:55 AM
Last modification on : Thursday, November 21, 2019 - 9:44:02 AM

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Peng Peng, Shu-Zhuang Sun, Yu-Xiang Liu, Xin-Mei Liu, Svetlana Mintova, et al.. Combined alkali dissolution and re-assembly approach toward ZSM-5 mesostructures with extended lifetime in cumene cracking. Journal of Colloid and Interface Science, Elsevier, 2018, 529, pp.283 - 293. ⟨10.1016/j.jcis.2018.06.013⟩. ⟨hal-01873235⟩

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