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|Title: ||On the use of ethanol for evaluating microporosity of activated carbons prepared from Polish lignite|
|Authors: ||Carrott, Peter J. M.|
Cansado, Isabel P. P.
Mourão, Paulo A. M.
Ribeiro Carrott, M. Manuela
Louro, Nélio D. B.
|Editors: ||Boehman, A.|
|Issue Date: ||2012|
|Abstract: ||Microporous activated carbons prepared by KOH chemical activation or steam activation from lignite were
characterised by adsorption of N2 at 77 K and CO2 at 298 K. Subsequently, the adsorption of ethanol was
carried out and complemented by adsorption of benzene and cyclohexane. The isotherm analysis included
application of the αs method using ethanol reference data obtained here by also studying non-porous carbon
blacks. The work confirmed that ethanol is an experimentally convenient adsorptive to use and leads to
results in overall agreement with those obtained using other probe molecules. Of particular interest was the
observation that ethanol can gain access to the whole microporosity even in the case of samples containing
constricted micropore entrances. It was also possible to show that certain furnace carbon blacks contain
intrinsic microporosity which is more difficult to unambiguously detect by adsorption of N2 at 77 K. On the
other hand, the results also suggested that the exact shape of the ethanol adsorption isotherm on a nonporous
surface is more sensitive to the nature of the surface than has previously been found with other
|Appears in Collections:||QUI - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
CQE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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