کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9617730 | 49186 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of ammonium salts on hydrothermal synthesis of high-silica mordenite
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of ammonium salts on hydrothermal synthesis of high-silica mordenite Effect of ammonium salts on hydrothermal synthesis of high-silica mordenite](/preview/png/9617730.png)
چکیده انگلیسی
Effect of ammonium salts on the direct hydrothermal synthesis of high-silica mordenite (MOR) zeolite with tetraethylammonium hydroxide was investigated. The addition of NH4NO3 to the system restrained the formation of MFI zeolite and quartz, and accelerated the crystallization rate of high-silica MOR zeolite. The MOR zeolite synthesized with NH4NO3 was very poorer in framework defects as compared with sample obtained without NH4NO3 as indicated by IR and 29Si MAS NMR techniques. It was also indicated by nitrogen adsorption study that the micropore and external surface areas of the MOR zeolites synthesized with ammonium salts are considerably larger than that of sample without ammonium salts. Under well-optimized conditions, the highly crystalline and pure MOR zeolite with a Si/Al ratio of â34 was successfully prepared by adding seed crystals and NaF as well as NH4NO3.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 81, Issues 1â3, 6 June 2005, Pages 365-374
Journal: Microporous and Mesoporous Materials - Volume 81, Issues 1â3, 6 June 2005, Pages 365-374
نویسندگان
Baowang Lu, Yasunori Oumi, Keiji Itabashi, Tsuneji Sano,