Abstract: 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.

Cite: Mashkovsky I.S. , Markov P.V. , Yakubov K.S. , Vaulina A.E. , Baeva G.N. , Smirnova N.S. , Kolyadenkov A.R. , Kazakov A.V. , Stakheev A.Y.
Effects of H2 and CO Concentrations on the Performance of PdAg/Al2O3 Catalysts in Selective Hydrogenation of Acetylene
Petroleum Chemistry. 2025. V.65. P.1225–1236. DOI: 10.1134/s0965544125601450 WOS Scopus OpenAlex

Identifiers:

Web of science:	WOS:001604827700001
Scopus:	2-s2.0-105020293988
OpenAlex:	W4415688278

Citing:

DB	Citing
OpenAlex	Нет цитирований
Scopus	Нет цитирований

Altmetrics: