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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Theoretical Foundations of Chemical Engineering</journal-id><journal-title-group><journal-title xml:lang="en">Theoretical Foundations of Chemical Engineering</journal-title><trans-title-group xml:lang="ru"><trans-title>Теоретические основы химической технологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0040-3571</issn><issn publication-format="electronic">3034-6053</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">686516</article-id><article-id pub-id-type="doi">10.31857/S0040357125010094</article-id><article-id pub-id-type="edn">txhlgw</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Influence of diesel fraction feed rate on silicon removal by the protective layer catalyst</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние скорости подачи дизельной фракции на удаление кремния катализатором защитного слоя</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Petrov</surname><given-names>R. V.</given-names></name><name xml:lang="ru"><surname>Петров</surname><given-names>Р. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>petrov@catalysis.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Reshetnikov</surname><given-names>S. I.</given-names></name><name xml:lang="ru"><surname>Решетников</surname><given-names>С. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>petrov@catalysis.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dick</surname><given-names>P. P.</given-names></name><name xml:lang="ru"><surname>Дик</surname><given-names>П. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>petrov@catalysis.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Golubev</surname><given-names>I. S.</given-names></name><name xml:lang="ru"><surname>Голубев</surname><given-names>И. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>petrov@catalysis.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Noskov</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Носков</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>petrov@catalysis.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Boreskov Institute of Catalysis of the Siberian Branch of the RAS</institution></aff><aff><institution xml:lang="ru">Институт катализа им. Г.К. Борескова (ИК СО РАН)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2025</year></pub-date><volume>59</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>77</fpage><lpage>85</lpage><history><date date-type="received" iso-8601-date="2025-07-01"><day>01</day><month>07</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-07-01"><day>01</day><month>07</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0040-3571/article/view/686516">https://transsyst.ru/0040-3571/article/view/686516</self-uri><abstract xml:lang="en"><p>The influence of diesel fuel feed rate on silicon adsorption on NiMo/Al<sub>2</sub>O<sub>3</sub>-protecting layer catalyst during hydrotreating was studied. Straight-run diesel fraction containing decamethylcyclopentasiloxane additive in the amount of 200 million<sup>–1</sup> as an additional source of silicon was used as a feedstock Three series of experiments of 60 hours duration each were carried out at specific feed rates equal to 0.75, 1.5 and 3.0 h<sup>–1</sup>. It was found that as the specific feed rate increases, the silicon content in the protective layer catalyst increases. To evaluate the efficiency of the adsorption process, the silicon recovery factor was used, which is equal to the ratio of the amount of adsorbed (extracted from the feedstock) silicon to the supplied during the time of the experiment. In the rate range of 0.75–3.0 h<sup>–1</sup> , the silicon recovery factor decreased from 0.93 to 0.61 due to more intensive filling of active centers on the catalyst surface. The influence of external mass transfer on the silicon adsorption process was evaluated.</p></abstract><trans-abstract xml:lang="ru"><p>Исследовано влияние скорости подачи дизельного топлива на адсорбцию кремния на NiMo/Al<sub>2</sub>O<sub>3</sub>-катализаторе защитного слоя в процессе гидроочистки. В качестве сырья использовалась прямогонная дизельная фракция, содержащая добавку декаметилциклопентасилоксана в количестве 200 млн<sup>–1</sup> как дополнительный источник кремния. Было проведено три серии экспериментов длительностью по 60 часов при удельных скоростях подачи, равных 0.75, 1.5 и 3.0 ч<sup>–1</sup>. Установлено, что с увеличением удельной скорости подачи содержание кремния в катализаторе защитного слоя увеличивается. Для оценки эффективности процесса адсорбции использовался коэффициент извлечения кремния, который равен отношению количества адсорбированного (извлеченного из сырья) кремния к поданному за время эксперимента. В диапазоне скоростей 0.75–3.0 ч<sup>–1</sup> коэффициент извлечения кремния снижался с 0.93 до 0.61 за счет более интенсивного заполнения активных центров на поверхности катализатора. Проведена оценка влияния внешнего массообмена на процесс адсорбции кремния.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hydrotreating</kwd><kwd>protective layers</kwd><kwd>NiMo/Al2O3 catalyst</kwd><kwd>silicon adsorption</kwd><kwd>three-phase reactor</kwd><kwd>mass transfer rate</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гидроочистка</kwd><kwd>защитные слои</kwd><kwd>NiMo/Al2O3-катализатор</kwd><kwd>адсорбция кремния</kwd><kwd>трехфазный реактор</kwd><kwd>скорость массообмена</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский Научный Фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>23-19-00214</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Zeuthen P., Schmidt M.T., Rasmussen H.W., Moyse B.M. 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