Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5009
Title: Microcalorimetric investigation of water vapor adsorption on silica gel
Authors: Demir, Hasan
Mobedi, Moghtada
Ülkü, Semra
Keywords: Diffusivity
Heat of adsorption
Microcalorimetry
Silica gel-water pair
Water vapor
Issue Date: Jul-2011
Publisher: Springer Verlag
Source: Demir, H., Mobedi, M., and Ülkü, S. (2011). Microcalorimetric investigation of water vapor adsorption on silica gel. Journal of Thermal Analysis and Calorimetry, 105(1), 375-382. doi:10.1007/s10973-011-1395-y
Abstract: Water vapor adsorption on silica gel was investigated using Tian-Calvet-type microcalorimetry. Differential heat of adsorption data was obtained. The setup of microcalorimetry was used volumetric system to determine adsorption isotherms of water vapor-silica gel. The Langmuir model was used in the interpretation of the adsorption data. The Clausius-Clapeyron diagram was also given. Effective mass diffusivity of water vapor in the silica gel particle as a function of temperature was also determined. The silica gel, which was degassed under vacuum at 10 -7 mbar and 120 °C for 18 h, was found to adsorb 0.6, 0.98, 1.1, 1.4, 2, 3.5, 11, 13, and 14 wt% water vapor at 120, 110, 100, 90, 75, 60, 40, 35, and 30 °C, respectively. The diffusivities of water vapor inside the silica gel for short- and long-range periods were described using kinetics data as a function of temperature in the Arrhenius form.
URI: http://doi.org/10.1007/s10973-011-1395-y
http://hdl.handle.net/11147/5009
ISSN: 1388-6150
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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