Absorption Behavior of Methanol Vapor on the Silica Gels

Abstract:

The adsorption behavior of methanol vapor onto three commercial silica gels named SG-1, SG-2 and SG-3 were investigated in this paper. The experimental results showed that SG-1 has the rich microporous, and the larger surface area and microporous volume than SG-2 and SG-3. The equilibrium adsorption data showed that the adsorption capacities of SG-1 was superior to SG-2 and SG-3 for lower concentration of methanol (<150 g/m3). However, SG-2 had higher adsorption capacities than SG-1 and SG-3 for higher concentration of methanol resulting from the condensation in mesopore channels. Three kinds of adsorption equilibrium equations including Langmuir equation, Freundlich equation and Dubinin-Astakov (D-A) equation were used to fit the methanol vapor adsorption isotherms. The results indicated that the experimental data can be well-fitted by D-A equation.

• Periodical: Materials Science Forum (Volume 1003)
• Pages: 156-162
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1003.156
• Online since: July 2020
• Authors: Ke Le Yan*, Yu Lin, Wang Qian
• Keywords: Adsorption, Isotherm, Methanol Vapor, Modelling, Silica Gels

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