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  • 1
    Electronic Resource
    Electronic Resource
    The critical size of clusters of water molecules on a carbon surface (1993)
    Springer
    Russian chemical bulletin 42 (1993), S. 46-48 
    Details
    ISSN: 1573-9171
    Keywords: graphitized carbon black ; surface ; adsorption center ; adsorption isotherm ; monolayer ; cluster of water molecules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The experimental adsorption isotherms of water and nitrogen vapors on graphitized carbonaceous adsorbents with large pore size prepared from ultradispersive technical carbon black have been compared with those on the surface of non-porous graphitized carbon black. The saturation value of water vapor adsorption has been shown to be proportional to the concentration of primary adsorption centers. At low concentrations of these centers the saturation value corresponds to the formation of fractions of a dense monolayer on the surface. The maximum size of clusters of water molecules on a carbonaceous adsorbent surface has been estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00699971
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  • 2
    Electronic Resource
    Electronic Resource
    Adsorption and mobility of molecules of water and organic compounds in carbon adsorbents (1993)
    Springer
    Russian chemical bulletin 42 (1993), S. 48-52 
    Details
    ISSN: 1573-9171
    Keywords: active carbon ; porous structure ; adsorption of water and organic compounds ; NMR ; self-diffusion coefficient ; diffusion activation energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The mobility of molecules of water and fluorine-containing organic compounds adsorbed in a mixture on active carbons has been studied by the NMR pulsed field gradient technique (1H and19F resonances). Samples with various H2O/C6F6 and H2O/C2Cl3F3 ratios have been examined. The mobility of components at total fill factors θ 〉 0.8 has been shown to decrease in comparison with the adsorption of pure substances while the diffusion activation energy increases. The results are interpreted on the basis of adsorption mechanisms of water and organic compounds on active carbons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00699972
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  • 3
    Electronic Resource
    Electronic Resource
    Bimodal micropore size distribution in active carbons (1993)
    Springer
    Russian chemical bulletin 42 (1993), S. 424-427 
    Details
    ISSN: 1573-9171
    Keywords: coal ; carbonized coal ; active carbon ; X-ray structural data ; microporous structure ; chemical composition ; adsorption of CO2 and H2O
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The porous structure of active carbon was compared with that of the original mineral coal and its carbonization products. The parameters of the porous structure were calculated from the adsorption isotherms of CO2 (298 K) and H2O (293 K). It was shown that carbonization of the original coal at 1120 K causes changes in the chemical composition, consolidation of the part which is amorphous to X-rays, generation of an ordered defect-containing structure on its basis, an increase in the volume of the micropores, and a decrease in the mean diameter. Activation of the carbonized coal affords a microporous structure with a bimodal size distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00698421
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