Key factor affecting the structural and textural properties of ZSM-5/MCM-41 composite |
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| Institution: | 1. Laboratoire de Chimie des Matériaux, Université d''Oran Es-Sénia, BP 1524 El-Mnaoeur, Oran, Algeria;2. Université Djillali Liabes Sidi-Bel-Abbès, BP 89, 22000 Sidi-Bel-Abbès, Algeria;1. Department of Chemistry, Moscow State University, Moscow, Russia;2. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russia;3. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia |
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| Abstract: | ZSM-5/MCM-41 micro/mesoporous composite materials were synthesized by the hydrothermal technique with alkali-treated ZSM-5 zeolite as source of silica and aluminum and characterized by various physico-chemical techniques such as X-ray diffraction (XRD), nitrogen sorption at 77 K, transmission electronic microscopy (TEM), FTIR spectroscopy and NH3 temperature programmed desorption (TPD) techniques. The effect of concentration of CTAB in the synthesis of these solids has been investigated, the mesopore volume, surface area and surface acidity decrease with increasing the concentration of CTAB. Increasing the CTAB concentration causes the recrystallization of zeolite ZSM-5 and it disadvantage the formation of mesoporous materials MCM-41. The catalytic activity of ZSM-5/MCM-41 materials has been evaluated in the Friedel–Crafts acylation of anisole with benzoyl chloride as alkylating agent. The results revealed the reaction to be influenced by surface area, pore volume and surface acidity. |
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| Keywords: | Microporous materials Organic compounds Electron microscopy X-ray diffraction Surface properties |
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