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Removal of BTEX vapours from waste gas streams using silica aerogels of different hydrophobicityŠtandeker, Suzana ; Novak, Zoran ; Knez, ŽeljkoSilica aerogels are alternative adsorbents to activated carbon (AC) for the removal and the recovery of organic vapours from gas streams. The adsorption capacity measurements of different silica ... aerogels were done by mini-column method. Continuous adsorption measurements show that silica aerogels are excellent adsorbents of BTEX vapours from waste gas stream. Compared to the most used adsorbents, such as AC and silica gel, aerogels exhibit capacities which enormously exceed that of both commonly used adsorbents. By increasing the degree of hydrophobicity, aerogels become less effective, but they do not adsorb water vapour from gas stream. Silica monolith aerogels with different degrees of hydrophobicity by incorporating methyltrimethoxysilane (MTMS) or trimethylethoxysilane (TMES) in standard sol-gel synthesis were prepared. Excellent properties of aerogels, obtained with the sol-gel synthesis, were preserved with supercritical drying with CO2. The degree of hydrophobicity of the aerogels was tested by measuring the contact angle of a water droplet with the aerogel surface. The aerogels were also characterised by FTIR, nitrogen sorption and DSC/TG measurements.Source: Journal of hazardous materials. - ISSN 0304-3894 (Vol. 165, iss. 1/3, June 2009, str. 1114-1118)Type of material - article, component partPublish date - 2009Language - englishCOBISS.SI-ID - 13318678
Author
Štandeker, Suzana |
Novak, Zoran |
Knez, Željko
Topics
silica aerogel |
hydrophobicity |
vapour phase adsorption |
BTEX removal |
porosimetry
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source: Journal of hazardous materials. - ISSN 0304-3894 (Vol. 165, iss. 1/3, June 2009, str. 1114-1118)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Štandeker, Suzana | 24386 |
Novak, Zoran | 13568 |
Knez, Željko | 02619 |
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