کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9617585 | 49169 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal analyses of various alkylamines-templated aluminophosphate AlPO4-21
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Thermal analyses of various alkylamines-templated aluminophosphate AlPO4-21 Thermal analyses of various alkylamines-templated aluminophosphate AlPO4-21](/preview/png/9617585.png)
چکیده انگلیسی
Thermal removals of amine-templated aluminophosphate molecular sieve AlPO4-21 have been studied by X-ray powder diffraction (XRD), TG-DTA and temperature-programmed decomposition coupled with mass spectrometer (TPD-MS) analyses (amine: ethylamine, dimethylamine and trimethylamine). It is found that the thermal removal of templates and bridging OH groups between two Al atoms is an endothermic process occurring in a single step in inert atmosphere, which accompanies the structural transformation of AlPO4-21 to AlPO4-25. The removal temperatures of various organic amines occluded within AlPO4-21 are directly related to the shapes and sizes of the templates, as well as the proton affinities of guest cations. These factors also determine the removal mechanisms of templates from AlPO4-21.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 84, Issues 1â3, 15 September 2005, Pages 21-26
Journal: Microporous and Mesoporous Materials - Volume 84, Issues 1â3, 15 September 2005, Pages 21-26
نویسندگان
Liping Xiao, Jiyang Li, Xujie Shen, Jihong Yu, Wenqin Pang, Ruren Xu,