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المؤلفBergaoui M.
المؤلفNakhli A.
المؤلفAl-Muhtaseb S.
المؤلفMohamed K.
تاريخ الإتاحة2020-02-05T08:53:06Z
تاريخ النشر2018
اسم المنشورJournal of Molecular Liquids
المصدرScopus
الرقم المعياري الدولي للكتاب1677322
معرّف المصادر الموحدhttp://dx.doi.org/10.1016/j.molliq.2018.01.016
معرّف المصادر الموحدhttp://hdl.handle.net/10576/12703
الملخصAdsorption of the n-alkane series, C1-C7, on Westvaco BAX-1100 activated carbon were measured over very broad ranges of temperature (293-393 K) and pressure (0.06-4964 Torr), depending on the n-alkane. Different behaviors of experimental adsorption isotherms were observed where various steps were noticed depending on the adsorbate length. A heterogeneous Gauss-monolayer model was developed based on statistical physics approach to evaluate the adsorption energy distribution (AED). Surface heterogeneity was evaluated and confirmed from isosteric heat of adsorption; where the adsorption of longer n-alkanes is energetically more favorable. A new equation was obtained from AED analysis to calculate the isosteric heat of adsorption. A notable difference between the adsorption isosteric heats estimated from AEDs and those obtained from classical Clausius-Clapeyron equation was observed at very low and high capacities. This difference was explained by the fact that, the gas behaves non-ideally at high pressure range. On the other hand, the absolute percentage deviation in adsorbed phase heat capacity was evaluated from the isosteric heat of adsorption predicted from the AED analysis. This percentage deviation increases when increasing the chain length of the alkane. 2018 Elsevier B.V.
اللغةen
الناشرElsevier B.V.
الموضوعActivated carbon
Adsorption energy distribution
Heterogeneous surface
Isosteric heats
n-Alkanes
Statistical physics approach
العنوانAdsorption process of n-alkanes onto BAX-1100 activated carbon: Theoretical estimation of isosteric heat of adsorption and energy distribution of heterogeneous surfaces
النوعArticle
الصفحات399-407
رقم المجلد252
dc.accessType Abstract Only


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