The adsorption of H2O and D2O on porous polystyrene adsorbents

Bardina, I.A.; Zhukova, O.S.; Kovaleva, N.V.; Lanin, S.N.

Авторы: Bardina I.A., Zhukova O.S., Kovaleva N.V., Lanin S.N.
Журнал: Russian Journal of Physical Chemistry A
Том: 81
Номер: 9
Год издания: 2007
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 1525
Последняя страница: 1531
DOI: 10.1134/S003602440709035X
Аннотация: Abstract The adsorption of H2O and D2O on porous polymers, Chromosorb-102 (styrene-divinylbenzene copolymer) and MN-200 (supercross-linked polystyrene), was studied by gas chromatography. Test adsorbates used to study the properties of the surface of these polymers were n-alkanes (C6-C9), C6H6, and the polar compounds CHCl3, CH3NO2, CH3CN, (CH3)2CO, C2H5COOCH3, and (C2H5)2O. The experimental data on the retention of the sorbates were used to determine the contributions of dispersion and specific intermolecular interactions to the total energy of adsorption for the systems studied. The electron donor K D and electron acceptor K A characteristics of the surfaces of Chromosorb-102 and MN-200 were determined. The K D and K A values obtained allow these polymers to be classified as weakly specific adsorbents with the predominance of electron acceptor properties. The adsorption isotherms of H2O and D2O were measured at 55, 67, and 80°C. The dependences of the isosteric heats of adsorption Q st on adsorption values were determined. The conclusion was drawn that H2O interacted with the surface of the polymers by the adsorption mechanism, whereas absorption likely made a noticeable contribution to the retention of D2O.
Добавил в систему: Ланин Сергей Николаевич

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The adsorption of H2O and D2O on porous polystyrene adsorbentsстатья

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