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Correlation of Gas Permeability and Diffusivity with Selectivity: Orientations of the Clouds of the Data Points and the Effects of Temperatureстатья
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: 26 апреля 2017 г.
- Авторы: Alentiev A., Yampolskii Yu
- Журнал: Industrial and Engineering Chemistry Research
- Том: 52
- Номер: 26
- Год издания: 2013
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 8864
- Последняя страница: 8874
- DOI: 10.1021/ie302680r
- Аннотация: For an extended data set for amorphous glassy polymers, the pair correlations Pi−Pj fulfill with very good accuracy (R2 about 0.9 or higher) where Pj and Pj are the permeability coefficients of the gases Mi and Mj in the same polymers. This allowed us to determine the orientation (medians) of the clouds of the data points on the correlations log Pi versus αij = Pi/Pj. It was shown that for various gas pairs the slopes of these medians are negative and increase by absolute value when the ratio of kinetic diameters of the penetrants increases. For the first time a similar analysis was carried out for pair correlations of the diffusion coefficients Di and Dj. On the diagrams log Di versus αDij = Di/Dj, the medians show the same trend as in the diagrams for permeability coefficients. The effects of temperature on the orientation of the clouds of the data points and upper bounds (limiting lines) of the diagrams log Pi versus αij = Pi/Pj were investigated using the available values of the activation energy of permeation. It was shown that for all the gas pairs the medians tend to shift down along the selectivity axis when temperature increases. Depending on a selected gas pair the slopes of the medians and upper bounds get either steeper or weaker. It was discussed that the positions and the slopes of the medians and limiting lines are sensitive to the Arrhenius parameters of gas permeation and temperature.
- Добавил в систему: Ямпольский Юрий Павлович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | alentiev2013_IECR.pdf | 3,4 МБ | 5 мая 2017 [Alentiev] |