Performance Stability of PdCu/Al2O3 Single-Atom Alloy Catalysts in Front-End vs. Tail-End Acetylene Hydrogenation

Performance Stability of PdCu/Al2O3 Single-Atom Alloy Catalysts in Front-End vs. Tail-End Acetylene Hydrogenation Научная публикация

Журнал

Petroleum Chemistry
ISSN: 0965-5441 , E-ISSN: 1555-6239

Вых. Данные

Год: 2026, DOI: 10.1134/s0965544126601195

Авторы

Mashkovsky Igor S. ¹ , Vaulina Anastasia E. ¹ , Markov Pavel V. ¹ , Baeva Galina N. ¹ , Smirnova Nadezhda S. ¹ , Kolyadenkov Artyom R. ¹ , Kazakov Alexander V. ¹ , Stakheev Alexander Yu. ¹

Организации

1	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

This study investigates the catalytic performance of bimetallic PdCu/Al2O3 catalysts in the front-end selective hydrogenation of acetylene, in comparison with the tail-end configuration. Physicochemical characterization of the catalysts (X-ray diffraction, transmission electron microscopy, and infrared spectroscopy of adsorbed CO) revealed that copper or silver incorporation generated single-atom sites (Pd1). Increasing the H2/C2H2 ratio from 5 to 60 caused thermal runaway of the Pd/Al2O3 catalyst, whereas the bimetallic systems maintained stable, kinetically controlled reactions. Under near-front-end conditions, the Pd1Cu5/Al2O3 catalyst tolerated CO concentration variations from 25 to 150 ppm, retaining 92–99% ethylene selectivity over the entire conversion range.

Mashkovsky I.S. , Vaulina A.E. , Markov P.V. , Baeva G.N. , Smirnova N.S. , Kolyadenkov A.R. , Kazakov A.V. , Stakheev A.Y.
Performance Stability of PdCu/Al2O3 Single-Atom Alloy Catalysts in Front-End vs. Tail-End Acetylene Hydrogenation
Petroleum Chemistry. 2026. DOI: 10.1134/s0965544126601195 WOS Scopus OpenAlex

Поступила в редакцию:	28 июл. 2026 г.
Принята к публикации:	20 авг. 2026 г.
Опубликована online:	24 сент. 2026 г.

≡ Web of science:	WOS:001884245600001
≡ Scopus:	2-s2.0-105051578395
≡ OpenAlex:	W7214244386