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Superheated solutions in dual-temperature ion exchange separationsстатья
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: 22 февраля 2018 г.
- Авторы: Ivanov V.A., Karpyuk E.A., Gavlina O.T., Kargov S.I.
- Журнал: Reactive and Functional Polymers
- Том: 122
- Номер: 1
- Год издания: 2018
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 107
- Последняя страница: 115
- DOI: 10.1016/j.reactfunctpolym.2017.11.009
- Аннотация: The problem of experimental determination of the differential enthalpy of ion exchange is considered. The determination of the enthalpy from experimental equilibrium coefficients is characterized by a high degree of error. A considerably more accurate method of determination of the differential enthalpy of ion exchange on selective ion exchangers is proposed. The method is based on the analysis only of the composition of the solution in the equilibrium system at two temperatures. The influence of temperature on the exchange of mono- and divalent ions on polyacrylic and polymethacrylic cation exchangers within the range from 273 K to 400 K is studied. It is shown than for all exchangers under study the differential enthalpy linearly increases with temperature. The role of the increase of with temperature in the process of a single-step dual-temperature separation is estimated. It is found that the increase of the upper temperature boundary leads to a very sharp increase of the degree of dual-temperature separation. This effect is most pronounced in superheated solutions. It is shown that when predicting changes in selectivity with temperature and the extent of purification of solutions of alkali metal salts from admixtures of divalent ions, it is necessary to take the temperature dependence of the ion exchange enthalpy into account.
- Добавил в систему: Иванов Владимир Александрович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | 1-s2.0-S1381514817302420-main.pdf | 1-s2.0-S1381514817302420-main.pdf | 541,1 КБ | 17 января 2018 [IvanovVA] |