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| Dynamic adsorption of volatile organic compounds on two kinds of mesoporous molecular sieves |
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Abstract The MCM-41 and SBA-15 mesoporous molecular sieves with ordered structure and high surface area were synthesized by template method. Dynamic adsorption of toluene, o-xylene, mesitylene on the mesoporous molecular sieves were studied. The adsorption of VOCs on mesoporous molecular sieves increased with increasing molecular size and concentration of VOCs, but decreased with increasing bed temperature. Because of the microporous structures which on the pore wall, the SBA-15 was appropriate in adsorption of low concentration and micromolecule VOCs, MCM-41 was appropriate in adsorption of high concentration and macromolecules VOCs. The result of TPD showed that the VOCs on mesoporous material could be desorbed mostly below 150℃.
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Received: 19 August 2009
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