کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7715991 | 1497462 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrogen desorption kinetics of CeCl3-doped sodium aluminum hydride compacts measured by parallel in situ FTIR-ATR-spectroscopy and gravimetry
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hydrogen desorption kinetics of CeCl3-doped sodium aluminum hydride compacts measured by parallel in situ FTIR-ATR-spectroscopy and gravimetry Hydrogen desorption kinetics of CeCl3-doped sodium aluminum hydride compacts measured by parallel in situ FTIR-ATR-spectroscopy and gravimetry](/preview/png/7715991.png)
چکیده انگلیسی
In this work, in situ FTIR-ATR-spectroscopy and gravimetry were used in parallel to determine the dehydrogenation reaction kinetics of 2Â mol% CeCl3-doped NaAlH4 compacts. Dehydrogenation measurements were performed under isothermal and isobaric conditions at different temperatures. Subsequently spectroscopic and gravimetric data were fitted by Johnson-Mehl-Avrami and Arrhenius equation to obtain the rate constants of the dehydrogenation and activation energy of the NaAlH4-Na3AlH6 phase change. On the one hand the measurements showed that cycling of the powder compacts enhances the dehydrogenation reaction kinetics of the NaAlH4 phase, whereby a decrease of the activation energy by 3.4Â kJ/mol was measured. On the other hand an influence on the calibration of the spectroscopic signal to the mass of desorbed hydrogen was observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 11, 22 March 2015, Pages 4175-4183
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 11, 22 March 2015, Pages 4175-4183
نویسندگان
Ingo Franke, Tobias Flick, Hans-Dieter Bauer, Birgit Scheppat,