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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">chemicallytech</journal-id><journal-title-group><journal-title xml:lang="en">Fine Chemical Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Тонкие химические технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-6593</issn><issn pub-type="epub">2686-7575</issn><publisher><publisher-name>MIREA – Russian Technological University (RTU MIREA).</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2410-6593-2022-17-3-189-200</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-1836</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>Analysis of the rectifying separation of H2O–D2O mixture into light and heavy water by means of mathematical modeling</article-title><trans-title-group xml:lang="ru"><trans-title>Анализ ректификационного разделения смеси H2O–D2O на легкую и тяжелую воду методом математического моделирования</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9278-871X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Короткова</surname><given-names>Т. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Korotkova</surname><given-names>T. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Короткова Татьяна Германовна, доктор технических наук, доцент, профессор кафедры безопасности жизнедеятельности</p><p>350072, г. Краснодар, ул. Московская, д. 2</p><p>Scopus Author ID 56195415000,</p><p>ResearcherID AAQ-3126-2021,</p><p>SPIN-код РИНЦ 3212-7120</p><p> </p></bio><bio xml:lang="en"><p>Tatyana G. Korotkova, Dr. Sci. (Eng.), Professor, Department of Life Safety</p><p>2, Moskovskaya ul., Krasnodar, 350072</p><p>Scopus Author ID 56195415000,</p><p>ResearcherID AAQ-3126-2021,</p><p>RSCI SPIN-code 3212-7120</p></bio><email xlink:type="simple">korotkova1964@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9848-7715</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Касьянов</surname><given-names>Г. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kasyanov</surname><given-names>G. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Касьянов Геннадий Иванович, доктор технических наук, профессор, профессор кафедры технологии продуктов питания животного происхождения</p><p>350072, г. Краснодар, ул. Московская, д. 2</p><p>Scopus Author ID 57063475000,</p><p>SPIN-код РИНЦ 1518-7974</p></bio><bio xml:lang="en"><p>Gennady I. Kasyanov, Dr. Sci. (Eng.), Professor, Department of Food Technology of Animal Origin</p><p>2, Moskovskaya ul., Krasnodar, 350072</p><p>Scopus Author ID 57063475000,</p><p>RSCI SPIN-code 1518-7974</p></bio><email xlink:type="simple">korotkova1964@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Кубанский государственный технологический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kuban State Technological University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>31</day><month>07</month><year>2022</year></pub-date><volume>17</volume><issue>3</issue><fpage>189</fpage><lpage>200</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Korotkova T.G., Kasyanov G.I., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Короткова Т.Г., Касьянов Г.И.</copyright-holder><copyright-holder xml:lang="en">Korotkova T.G., Kasyanov G.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.finechem-mirea.ru/jour/article/view/1836">https://www.finechem-mirea.ru/jour/article/view/1836</self-uri><abstract><sec><title>Objectives</title><p>Objectives. To apply an analytical method for the calculation of a distillation column for the production of D2O at a two-column Kuhn installation operating under vacuum: to simulate the Kuhn installation in the Hysys software; and to compare experimental and calculated data.</p></sec><sec><title>Methods</title><p>Methods. Analytical method for the calculation of distillation columns “from stage to stage,” from the lower theoretical separation stage (TSS) to the upper stage. This method is based on phase equilibrium at the TSS with known data of input flows and component concentrations in the column bottoms. Hysys was used as modeling software.</p></sec><sec><title>Results</title><p>Results. Comparison of the calculation results with Kuhn’s experimental data testified to the high calculation accuracy of the vapor–liquid phase equilibrium for the H2O–D2O mixture at the TSS. The convergence of the D2O material balance for the entire installation was 0.005%. The identification parameter was the number of the column feed plate. Simulation of the Kuhn installation in the Hysys software showed a qualitative agreement of D2O concentrations in material flows. The UNIQUAC (UNIversal QUAsiChemical) model was used to calculate activity coefficients. The found values of the number of theoretical separation stages (NTSS) in both columns, were 88 and 153 taking into account the reboiler and condenser. This is less than the experimental 295 and 400, respectively. The discrepancy can be explained by the increased phase equilibrium H2O constant in the UNIQUAC model. However, the convergence of the material balance in terms of D2O was high and amounted to 1.38·10−6 %. The absolute error of the found concentrations in material flows did not exceed 0.12 mol %.</p></sec><sec><title>Conclusions</title><p>Conclusions. The results obtained indicated the possible use of the Hysys modeling software when searching for and optimizing the operating mode of the block diagram of a cascade of distillation columns with direct and recycle flows to separate a mixture of water into light and heavy water. The final results obtained with regard to the operating mode, inlet and outlet material flows (flow rate, composition, temperature, and pressure drop across the column) are recommended for use in the analytical program for the calculation of the distillation column to refine the NTSS and distribution profile of the concentrations of the H2O and D2O components along the height of the column.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Цели</title><p>Цели. Применение аналитического метода расчета ректификационной колонны для получения D2O в двухколонной установке Куна, работающей под вакуумом. Моделирование установки Куна в программной среде Hysys. Сравнение экспериментальных и расчетных данных.</p></sec><sec><title>Методы</title><p>Методы. Аналитический метод расчета ректификационной колонны «от ступени к ступени» от нижней теоретической ступени разделения (ТСР) к верхней, основанный на фазовом равновесии на ТСР при известных исходных данных входных потоков и концентраций компонентов в кубе колонны. Среда моделирования Hysys.</p></sec><sec><title>Результаты</title><p>Результаты. Сравнение результатов расчета с экспериментальными данными Куна свидетельствовало о высокой точности расчета равновесия фаз пар – жидкость для смеси H2O–D2O на ТСР. Сходимость материального баланса по D2O по установке в целом составила 0.005%. Параметром идентификации являлся номер тарелки питания колонны. Моделирование установки Куна в среде Hysys показало качественное согласование концентраций D2O в материальных потоках. Для расчета коэффициентов активности использована модель UNIversal QUAsiChemical (UNIQUAC). Найденные значения числа теоретических ступеней разделения (ЧТСР) в обеих колоннах с учетом ребойлера и конденсатора составляют 88 и 153, что меньше экспериментальных 295 и 400 соответственно. Расхождение объясняется повышенным значением константы фазового равновесия H2O модели UNIQUAC, однако сходимость материального баланса по D2O высокая и составляет 1.38·10−6 %. Абсолютная погрешность найденных значений концентраций в материальных потоках не превышает 0.12 мол. %.</p></sec><sec><title>Выводы</title><p>Выводы. Полученные результаты свидетельствуют о возможном применении среды моделирования Hysys для поиска и оптимизации режима работы структурной схемы каскада ректификационных колонн с прямыми и рецикловыми потоками для разделения смеси воды на легкую и тяжелую воду. Полученные конечные результаты по режиму работы, входным и выходным материальным потокам (расход, состав, температура, перепад давлений по колонне) рекомендовано использовать в аналитической программе расчета ректификационной колонны для уточнения ЧТСР и профиля распределения концентраций компонентов H2O и D2O по высоте колонны.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>легкая вода</kwd><kwd>тяжелая вода</kwd><kwd>Hysys</kwd><kwd>непрерывная ректификация</kwd><kwd>коэффициент разделения</kwd><kwd>коэффициенты активности H2O и D2O</kwd></kwd-group><kwd-group xml:lang="en"><kwd>light water</kwd><kwd>heavy water</kwd><kwd>Hysys</kwd><kwd>continuous distillation</kwd><kwd>separation factor</kwd><kwd>activity coefficients of H2O and D2O</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Plotnikova L.V., Chilikova I.I., Sitnikov S.Y., Ukhlin V.E., Efremov G.I., Kislov A.P. 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