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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">Petroleum Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Petroleum Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Нефтехимия</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0028-2421</issn><issn publication-format="electronic">3034-5626</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">655634</article-id><article-id pub-id-type="doi">10.31857/S0028242123010033</article-id><article-id pub-id-type="edn">TXBBOF</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">Effects of Grain Size on the Activity of H-MFI Zeolites in Liquid-Phase Condensation of Propene with Formaldehyde</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние размера частиц на активность цеолита H-MFI в жидкофазной конденсации пропена с формальдегидом</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bedenko</surname><given-names>S. P</given-names></name><name xml:lang="ru"><surname>Беденко</surname><given-names>С. П</given-names></name></name-alternatives><email>bedenko@ips.ac.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mukusheva</surname><given-names>A. A</given-names></name><name xml:lang="ru"><surname>Мукушева</surname><given-names>А. А</given-names></name></name-alternatives><email>petrochem@ips.ac.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Malyavin</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Малявин</surname><given-names>В. В</given-names></name></name-alternatives><email>petrochem@ips.ac.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dement'ev</surname><given-names>K. I.</given-names></name><name xml:lang="ru"><surname>Дементьев</surname><given-names>К. И.</given-names></name></name-alternatives><email>petrochem@ips.ac.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт нефтехимического синтеза им. А.В. Топчиева РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Gubkin Russian State University of Oil and Gas (National Research University)</institution></aff><aff><institution xml:lang="ru">РГУ нефти и газа им. И.М. Губкина</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2023</year></pub-date><volume>63</volume><issue>1</issue><issue-title xml:lang="en">NO1 (2023)</issue-title><issue-title xml:lang="ru">№1 (2023)</issue-title><fpage>32</fpage><lpage>41</lpage><history><date date-type="received" iso-8601-date="2025-02-11"><day>11</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Российская академия наук</copyright-statement><copyright-year>2023</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://journals.eco-vector.com/0028-2421/article/view/655634">https://journals.eco-vector.com/0028-2421/article/view/655634</self-uri><abstract xml:lang="en"><p>This study investigated the activity of H-MFI catalysts modified by the top-down method in the liquid-phase Prins reaction between propene and formaldehyde. The physicochemical characterization of the catalyst demonstrated that grinding the catalyst reduces the specific surface area and affects the micropore to mesopore ratio in the samples. Reducing the grain size was found to increase the initial substrate consumption rate and reduce the diffusion limitations in the system. At the same time, grinding shifts the product composition towards a higher proportion of byproducts. An assessment of the kinetic curves enabled the researchers to propose a number of equations that accurately reflect catalyst deactivation. Both the reaction rate and deactivation rate vary directly with the zeolite dispersion, while the deactivation of the sample is more sensitive to the grain size.</p></abstract><trans-abstract xml:lang="ru"><p>Исследована активность катализаторов H-MFI, модифицированных методом «top-down» в жидкофазной Принса реакции между пропеном и формальдегидом. С помощью анализа физико-химических характеристик катализатора показано, что его измельчение приводит к снижению удельной поверхности и изменению соотношения микро- и мезопор в образце. Установлено, что снижение размера зерна приводит к увеличению скорости начального превращения субстрата, а также к снижению диффузионных ограничений, накладываемых на систему. В то же время обработка способствует изменению состава продуктов в сторону увеличения доли побочных. Полученные кинетические кривые проанализированы, предложены уравнения, учитывающие дезактивацию катализатора. Показано, что как скорость реакции, так и скорость дезактивации увеличивается пропорционально дисперсности цеолита, причем дезактивация образца более чувствительна к размеру частиц.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Prins reaction</kwd><kwd>kinetics</kwd><kwd>propene</kwd><kwd>formaldehyde</kwd><kwd>H-MFI</kwd><kwd>catalyst size</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Принса реакция</kwd><kwd>кинетика</kwd><kwd>пропилен</kwd><kwd>формальдегид</kwd><kwd>цеолит Н-MFI</kwd><kwd>размер катализатора</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Платэ Н.А., Сливинский Е.В. Основы химии и технологии мономеров. М.: Наука, 2002. 696 с.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Dahlmann M., Grub J. Butadiene. 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