کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4758129 | 1420404 | 2018 | 9 صفحه PDF | دانلود رایگان |
- Energetic performances of large pore DON and CFI-type zeosils by intrusion of nonwetting liquids under high pressure.
- Water and LiCl aqueous solutions were used as nonwetting liquids.
- For both zeosils, the “zeosil-nowetting liquid” systems display a spring behavior.
- The maximal stored energy achieves 14.6 and 6.8Â J/g for CFI and DON-type zeosil-based systems, respectively.
The energetic performances of pure silica CFI and DON-type zeolites (zeosils) were studied by intrusion-extrusion experiments in water and LiCl aqueous solutions at different concentrations. For both zeosils, characterized by a 1D channel system with 14Â MR pore openings, when water is used as nonwetting liquid a perfect reversible spring behavior is observed with an intrusion pressure of 75 and 26Â MPa, respectively. The lower value for the DON-type structure is probably due to a larger pore aperture. The intrusion pressures in both cases rise considerably with the LiCl concentration, but the doubling of the salt concentration from 10 to 20Â M leads only to a slight increase of the intrusion pressure. The maximal stored energy achieves 14.6 and 6.8Â J/g for CFI and DON-type zeosil-based systems, respectively. The zeolite samples were characterized before and after intrusion-extrusion experiments by XRD, SEM, N2 adsorption-desorption, TG and NMR analysis in order to get a better understanding of the influence of these intrusion-extrusion experiments on the CFI and DON-type structures.
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Journal: Microporous and Mesoporous Materials - Volume 255, 1 January 2018, Pages 211-219