کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1505508 993765 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The synthesis of mesoporous zeolite beta aggregates without the use of second template and additive
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The synthesis of mesoporous zeolite beta aggregates without the use of second template and additive
چکیده انگلیسی

Zeolite Beta Aggregates have been synthesized by the self-assembly of Beta nanoparticles without the use of second template or additive, where the large zeolitic aggregates avoided the filtration difficulties and the presence of mesopore reduced the diffusion limitation. The samples were characterized by XRD, N2-sorption, SEM, TEM, thermogravimetric analysis, IR spectroscopy and temperature programmed desorption of ammonia. The results showed that the SiO2/Al2O3 ratio played a key role on the particle size, mesopore volume and particle–particle aggregation process of zeolite Beta. The sample with SiO2/Al2O3 ratio below 60 had improved textual and acidic properties and exhibited the best catalytic activity to the alkylation of phenol with tert-butanol.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Sciences - Volume 12, Issue 7, July 2010, Pages 1070–1075
نویسندگان
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