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Experimental and Theoretical Study of Enhanced Vapor Transport through Nanochannels of Anodic Alumina Membranes in a Capillary Condensation Regimeстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 июля 2016 г.
- Авторы: Petukhov D.I., Berekchiian M.V., Pyatkov E.S., Solntsev K.A., Eliseev A.A.
- Журнал: Journal of Physical Chemistry C
- Том: 120
- Номер: 20
- Год издания: 2016
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 10982
- Последняя страница: 10990
- DOI: 10.1021/acs.jpcc.6b02971
- Аннотация: The pressure-driven flow of condensable and permanent gases was studied experimentally for anodic alumina membranes with channel diameters ranging from 20 to 90 nm depending on feed and permeate pressures. A substantial permeability rise for condensable gases was detected under capillary condensation conditions. A self-consistent theoretical model for mixed liquid–gas transport through the nanopore was suggested based on the obtained experimental results. The model was used for the evaluation of the pressure drop in a liquid defined by menisci curvatures and determination of the optimal conditions to enhance the membrane performance. The highest pressure difference in a liquid can be obtained by decreasing the entrance meniscus curvature with a simultaneous increase in the curvature of the evaporating meniscus. This case was realized in asymmetric membranes with multiple branching of channels into 5 nm nanocapillaries, resulting in up to 10× enhancement of isobutane permeability (up to 450 m3/(m2·bar·h)) in the capillary condensation regime. Combined with a serious selectivity rise for condensable and permanent components of gas mixtures, this enables mesoporous membranes to be successfully utilized in the self-controlled removal of water and hydrocarbon vapors for the conditioning of natural and associated petroleum gas.
- Добавил в систему: Петухов Дмитрий Игоревич