Dimethylether production on zeolite catalysts activated by Cl-, F- and/or ultrasonication |
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| Authors: | Sameh M K Aboul-Fotouh Noha A K Aboul-Gheit Mona A Naghmash |
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| Institution: | 1. Chemistry Department, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt;
2. Faculty of Science, Chemistry Department, Northern Border University, Arar 91431, Kingdom of Saudi Arabia;
3. Egyptian Petroleum Research Institute, Cairo 11787, Egypt |
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| Abstract: | The chlorinated and fluorinated zeolite catalysts were prepared by the impregnation of zeolites (H-ZSM-5, H-MOR or H-Y) using two halogen precursors (ammonium chloride and ammonium fluoride) in this study. The influence of ultrasonic irradiation was evaluated for optimizing both halogen precursors for production of dimethylether (DME) via methanol dehydration in a fixed bed reactor. The catalysts were characterized by SEM, XRD, BET and NH3-TPD. The reaction conditions were temperatures from 100 to 300 ℃ and a WHSV =15.9 h-1. All halogenated catalysts show higher catalytic activities at all reaction temperatures studied. However, the halogenated zeolite catalysts prepared under ultrasonic irradiation show higher performance for DME formation. The chlorinated zeolite catalysts show higher activity and selectivity for DME production than the respective fluorinated versions. |
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| Keywords: | ultrasonication DME zeolite Cl- F- |
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