کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
76083 49132 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystal size control of transition metal ion-incorporated aluminophosphate molecular sieves: Effect of ramping rate in the syntheses
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Crystal size control of transition metal ion-incorporated aluminophosphate molecular sieves: Effect of ramping rate in the syntheses
چکیده انگلیسی

Several aluminophosphate (AlPO) molecular sieves (AEL and AFI structures) containing Co, V or Fe are synthesized in various ramping rates (reciprocal of the time needed to reach the reaction temperature from room temperature) in order to understand the effect of the rates on the crystal size of the molecular sieves. As the ramping rate increases, the crystal size decreases probably because the nucleation rate is higher than the crystal growth rate when the reaction temperature increases rapidly. The small crystals obtained by rapid heating adsorb benzene rapidly, offering potential application in catalysis and separation. The suggested method to control a crystal size is very simple (does not require additive materials, different precursors or pH modifier, etc.), reproducible and applicable in the synthesis of various porous materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 112, Issues 1–3, 1 July 2008, Pages 178–186
نویسندگان
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