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Effects of H2 and CO Concentrations on the Performance of PdAg/Al2O3 Catalysts in Selective Hydrogenation of Acetyleneстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 января 2026 г.
- Авторы: Mashkovsky I.S., Markov P.V., Yakubov K.Sh, Vaulina A.E., Baeva G.N., Smirnova N.S., Kolyadenkov A.R., Kazakov A.V., Stakheev A.Yu
- Журнал: Petroleum Chemistry
- Год издания: 2025
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- DOI: 10.1134/s0965544125601450
- Аннотация: This study compares Pd/Al2O3 and Pd1Ag5/Al2O3 catalysts for the front-end selective hydrogenation of acetylene, with a focus on how their catalytic performance correlates with the H2 : C2H2 ratio and CO concentration. A combination of physicochemical characterization methods demonstrated that single-atom Pd1 sites isolated from one another by Ag atoms were formed on the surface of the bimetallic sample. The acetylene hydrogenation rate increased with the H2:C2H2 ratio, a correlation that was more pronounced for Pd/Al2O3 than for Pd1Ag5/Al2O3. This was quantified by the apparent reaction order with respect to hydrogen (n(H2)), which was 1.5 and 1.0, respectively. While increasing the H2 : C2H2 ratio had a significant adverse impact on selectivity toward the target product, this was effectively counteracted by the addition of CO to the reaction mixture. Furthermore, promoting the Pd/Al2O3 catalyst with Ag eliminated any thermal runaway effect and facilitated precise temperature control.
- Добавил в систему: Стахеев Александр Юрьевич