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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">catal</journal-id><journal-title-group><journal-title xml:lang="ru">Катализ в промышленности</journal-title><trans-title-group xml:lang="en"><trans-title>Kataliz v promyshlennosti</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1816-0387</issn><issn pub-type="epub">2413-6476</issn><publisher><publisher-name>LLC "KALVIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18412/1816-0387-2026-3-18-31</article-id><article-id custom-type="elpub" pub-id-type="custom">catal-1266</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="ru"><subject>КАТАЛИЗ В ХИМИЧЕСКОЙ И НЕФТЕХИМИЧЕСКОЙ ПРОМЫШЛЕННОСТИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CATALYSIS IN CHEMICAL AND PETROCHEMICAL INDUSTRY</subject></subj-group></article-categories><title-group><article-title>Модифицирование NH4F микросферического алюмохромового катализатора дегидрирования изобутана</article-title><trans-title-group xml:lang="en"><trans-title>NH4F modification of microspherical CrOx/Al2O3 catalyst for isobutane dehydrogenation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Егорова</surname><given-names>С. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Egorova</surname><given-names>S. R.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иванова</surname><given-names>А. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivanova</surname><given-names>A. Z.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ермолаев</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ermolaev</surname><given-names>R. V.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шамсуллин</surname><given-names>Д. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Shamsullin</surname><given-names>D. F.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маннапова</surname><given-names>Л. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Mannapova</surname><given-names>L. M.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ламберов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lamberov</surname><given-names>A. A.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский (Приволжский) федеральный университет, Казань</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kazan</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ООО «СИБУР-Инновации», Казань</institution><country>Россия</country></aff><aff xml:lang="en"><institution>LLC ‘SIBUR-Innovations’, Kazan</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>08</day><month>06</month><year>2026</year></pub-date><volume>26</volume><issue>3</issue><fpage>18</fpage><lpage>31</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; LLC "KALVIS", 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">LLC "KALVIS"</copyright-holder><copyright-holder xml:lang="en">LLC "KALVIS"</copyright-holder><license xlink:href="https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.catalysis-kalvis.ru/jour/article/view/1266">https://www.catalysis-kalvis.ru/jour/article/view/1266</self-uri><abstract><p>Методами РФА, РФлА, низкотемпературной адсорбции азота, УФ-Вид-, Раман-спектроскопии, ТПД-NH3, химического анализа изучено влияние модифицирования NH4F на физико-химические характеристики, состояние активного компонента и каталитические показатели микросферических алюмохромовых катализаторов в процессе дегидрирования изобутана в изобутилен. Установлено, что после нанесения NH4F и термообработки катализатора фтор распределяется и закрепляется на поверхности, изменяет фазовый состав, текстурные характеристики, кислотные свойства поверхности. При этом в составе катализатора формируются фазы α-Cr2O3, оксифторидов алюминия и хрома, твердый раствор (CrхAl2–х)O3. Поверхностные фтор-ионы повышают общую концентрацию кислотных центров, формируют сильные кислотные центры, увеличивают в процессе дегидрирования конверсию изобутана, скорость образования изобутилена, селективность по изобутилену. При формировании оксифторидов алюминия и хрома уменьшается активность катализатора, но сохраняется высокой селективность. При формировании фазы (CrхAl2–х)O3 катализатор дезактивируется.</p></abstract><trans-abstract xml:lang="en"><p>The effect of NH4F modification on the physicochemical characteristics, active component state, and catalytic performance of microspherical CrOx/Al2O3 during isobutane dehydrogenation to isobutylene was studied using X-ray diffraction (XRD), X-ray fluorescence (XRF), low-temperature nitrogen adsorption, UV-Vis and Raman spectroscopy, NH3-TPD, and chemical analysis. It was found that after NH4F application and thermal treatment of the catalyst, fluorine is distributed and adheres to the surface, altering the phase composition, textural characteristics, and acidic properties of the surface. Furthermore, phases of α-Cr2O3, the aluminum and chromium oxyfluorides, (CrxAl2-x)O3 solid solution are formed in the catalysts. Surface fluoride ions increase the overall concentration of acidic sites, form strong acidic sites, and increase the conversion of isobutane, the rate of isobutylene formation, and the selectivity for isobutylene during dehydrogenation. When the aluminum and chromium oxyfluorides are formed, the catalyst activity decreases, but selectivity remains high. When (CrхAl2-х)O3 phase are formed, the catalyst is deactivated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>кислородные соединения хрома</kwd><kwd>фтор</kwd><kwd>алюмохромовый катализатор</kwd><kwd>дегидрирование</kwd><kwd>изобутан</kwd><kwd>изобутилен</kwd></kwd-group><kwd-group xml:lang="en"><kwd>oxygen compounds of chromium</kwd><kwd>fluorine</kwd><kwd>CrOx/Al2O3</kwd><kwd>dehydrogenation</kwd><kwd>isobutene</kwd><kwd>isobutylene</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена за счет средств Программы стратегического и академического лидерства Казанского (Приволжского) федерального университета («Приоритет-2030»).</funding-statement><funding-statement xml:lang="en">The work was carried out using funds from the Strategic and Academic Leadership Program of Kazan (Volga Region) Federal University (“Priority 2030”).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Sanfilippo D., Miracca I. // Catalysis Today. 2006. 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