کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
638589 | 1456175 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrothermal stability of LTA zeolite membranes in pervaporation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hydrothermal stability of LTA zeolite membranes in pervaporation Hydrothermal stability of LTA zeolite membranes in pervaporation](/preview/png/638589.png)
چکیده انگلیسی
Aiming at the application in pervaporation dehydration process, the hydrothermal stability of LTA zeolite membranes in pervaporation was investigated. Although our LTA zeolite membranes possessed excellent long-term stability in vapor permeation, they failed in pervaporation at high water concentration. The changes of morphology and asymmetric stretching vibrations of TO4 (TÂ =Â Si or Al) of the LTA zeolite membranes after stability test were detected by SEM and FTIR/ATR, respectively. XRD characterization was performed to detect the changes of diffraction intensity of the LTA zeolite membranes. It was found that the damage of LTA zeolite membrane by water mainly occurred in the grain boundary regions. The amorphous-like structure of the grain boundary is probably the principal cause of the low hydrothermal stability of LTA zeolite membrane at high water concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 297, Issues 1â2, 5 July 2007, Pages 10-15
Journal: Journal of Membrane Science - Volume 297, Issues 1â2, 5 July 2007, Pages 10-15
نویسندگان
Yanshuo Li, Han Zhou, Guangqi Zhu, Jie Liu, Weishen Yang,