Efficient Hydrochlorination of Acetylene by the Ag–Ru Bimetallic Catalyst in a Deep Eutectic Solvent

作者：Hui Shao, Yingzhou Lu, Hong Meng, Hongwei Fan, Xin Liang, Chunxi Li · 发表于：Industrial & Engineering Chemistry Research · 年份：2024 · DOI：10.1021/acs.iecr.4c00167 · 被引用次数：8 · 研究领域：Catalytic Processes in Materials Science、Catalysis and Oxidation Reactions、Environmental remediation with nanomaterials

A series of Ag–Ru/AC bimetallic catalysts were synthesized for acetylene hydrochlorination using a deep eutectic solvent (DES) as the dispersant. Their structures were characterized using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and temperature programmed desorption (TPD), and the catalytic performance was assessed at varying conditions. Among them, 5Ag-0.07Ru-10DES/AC showed the best catalytic performance, with 97.6% acetylene conversion at 180 °C, GHSV (C 2 H 2 ) = 180 h –1, and V HCl / V C 2 H 2 = 1–1.25. DES promoted the dispersion of metal particles, enhanced the adsorption and reactivity of HCl, and reduced the coking of the catalyst. The interaction among 1-ethyl-3-methylimidazolium chloride ([Emim]Cl), reactants, and products was studied using density functional theory (DFT) calculations, the synergistic mechanism of the bimetallic catalyst was justified, and the influence of [Emim]Cl on the catalytic performance was revealed. This work provided a theoretical basis for the development of efficient nonmercury catalysts for acetylene hydrochlorination.