Synthesis and characterization of zirconia aerogels /
acetic acid and npropanol using the sol-gel process.
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1994.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | acetic acid and npropanol using the sol-gel process. adsorption / desorption isotherms were studied to follow the alcohol content. The gelation process was accelerated with Analysis. The aerogels were sulfated and characterized using and n-propanol. The hydrolysis product then polymerizes autoclave to yield aerogels. 'ne aerogels were characterized changes in the pore shapes of the aerogels prepared under combination of both. The superacidity of sulfated zirconia controlled hydrolysis was achieved through generation of different conditions. Pyridine adsorption on sulfated aerogel diffraction, Infrared Analysis and Simultaneous Thermal form, and ( iii ) the reversible transformation between increasing acetic acid content and also with increasing increasing temperature and was found to obey the Arrhenius is attributed to the presence of the combination of both monoclinic and tetragonal phases. Fourier Transform Infrared organics and phase transformation from cubic to monoclinic pore sizes decreased with increasing alkoxide concentration. pyridine adsorption and NMR. Gelation times increased with relation. The surface areas of the aerogels increased but showed peaks for Lewis acid sites, Br6nsted acid sites and a Spectroscopy and X-ray powder diffraction studies confirmed the appearance of three regions of change: ( i ) removal of The differential thermal analysis curve was characterized by the results from the thermal analysis. The BET nitrogen the solvent and free water, ( i i ) removal of the residual through a fast condensation reaction to produce a gel. The types of the acid sites. using BET nitrogen adsorption method, X-ray powder water from the esterification reaction between acetic acid wetgels were dried under supercritical conditions in an Zirconia gels were prepared using zirconium n-propoxide, Zirconium alkoxides are very moisture sensitive, but |
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| Item Description: | "Major subject: Chemical Engineering". Vita. |
| Physical Description: | xii, 84 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references. |