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Title
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Removal of methyl-ethyl ketone vapour on polyacrylonitrile-derived carbon/mesoporous silica nanocomposite adsorbents
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Author
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Abstract
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| Mesoporous silica supports (MCM-41, SBA-15 and silica gel) were modified by the introduction of controlled amounts of polymer-derived carbon. Precipitation polymerization of polyacrylonitrile in the aqueous suspension of a silica material was used as a deposition method. The samples of PAN/silica composites were studied by thermal analysis, performed in air and inert atmosphere, in order to determine the amount of a deposited polymer and its thermal stability. The effect of surface area of a silica support and the monomer concentration in the mother solution on the effectiveness of deposition was revealed. The PAN/silica composites were transformed into C/SiO(2) adsorbents by carbonization carried out at 623 K. Texture (low-temperature sorption of N(2)), surface structure (FTIR-DRIFT) and morphology (SEM) of the carbonized samples were investigated. The adsorption tests in the elimination of methyl ethyl ketone from gas phase were performed under dynamic conditions. The MCM-41-based composites containing highly dispersed carbon layers on the surface appeared to be the most promising adsorbents for a commercial application. Moreover, these materials exhibited a high stability in the adsorption desorption runs repeated ten times suggesting the possibility of regeneration of the adsorbent bed without a significant loss in the adsorption effectiveness. (C) 2011 Elsevier Inc. All rights reserved. |
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Language
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English
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Source (journal)
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Microporous and mesoporous materials: zeolites, clays, carbons and related materials. - Amsterdam
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Publication
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Amsterdam
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2011
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ISSN
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1387-1811
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DOI
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10.1016/J.MICROMESO.2011.04.029
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Volume/pages
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145
:1/3
(2011)
, p. 65-73
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ISI
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000294974100010
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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