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Fibrous Carbon Molecular Sieves by Chemical Vapor Deposition of Benzene. Gas Separation Ability

AuthorsVillar Rodil, Silvia ; Denoyel, R.; Rouquerol, J.; Martínez Alonso, Amelia ; Díez Tascón, Juan Manuel
Issue Date21-Sep-2002
PublisherAmerican Chemical Society
CitationChemistry of Materials 14(10): 4328-4333 (2002)
AbstractActivated carbon fibers (ACFs) prepared from highly ordered polymers, such as aramid fibers, have been proven to possess an outstanding homogeneity in pore size. Taking advantage of this feature, microporous carbon molecular sieves for separating gaseous mixtures such as CO2/CH4 and O2/N2 (air separation) have been prepared through chemical vapor deposition (CVD) of benzene on ACFs obtained from Nomex aramid fiber. Two batches of carbon fibers steam-activated to different burnoffs (BOs), namely, 21% and 42%, were subjected to CVD of benzene for different periods of time. The micropore size distribution of the resulting materials was assessed by immersion calorimetry into liquids of different molecular sizes (dichloromethane, benzene, and cyclohexane). Their validity for separating CO2/CH4 and O2/N2 was tested by performing the corresponding kinetics of adsorption experiments. Carbon molecular sieves with good selectivity for these two separations and showing acceptable adsorption capacities were obtained from ACFs activated to the two chosen BOs.
DescriptionThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see https://doi.org/10.1021/cm021193n
Publisher version (URL)https://doi.org/10.1021/cm021193n
Appears in Collections:(INCAR) Artículos
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