کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7606259 | 1492945 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ni-doped high silica HZSM-5 zeolite (Si/Alâ¯=â¯200) nanocatalyst for the selective production of olefins from methanol
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This study deals with the modification of high silica H-ZSM-5 zeolite by different transition metals (nickel, iridium and silver). The nanocatalysts were characterized by XRD, FE-SEM, FT-IR, NH3-TPD, Pyridine adsorption IR spectra (Py-IR) and N2 adsorption-desorption. The metal (0.5â¯wt.%) was introduced by wet impregnation technique including multi-steps. The promoter species were uniformly distributed on the nanocatalyst without significant damage of the structure. The nickel impregnation resulted in the high crystallinity (97.2%) and well-adjusted acidity (strong/weak acidityâ¯=â¯0.98). The results showed that the nickel impregnation not only modulated the concentration of acid sites but also regulated the acid type. The highest methanol conversion (99.9%), light olefins selectivity (84%) and the lowest C5+ selectivity (<10%) showed the high efficient performance of the nickel-doped ZSM-5 nanocatalyst in methanol to olefin (MTO) reaction for long time on stream.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Analytical and Applied Pyrolysis - Volume 132, June 2018, Pages 1-10
Journal: Journal of Analytical and Applied Pyrolysis - Volume 132, June 2018, Pages 1-10
نویسندگان
Mohammad Rostamizadeh, Fereydoon Yaripour, Hossein Hazrati,