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Effect of acidity and ruthenium species on catalytic performance of ruthenium catalysts for acetylene hydrochlorination

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Abstract

Carbon-supported ruthenium catalysts are promising mercury-free catalysts for acetylene hydrochlorination, due to their high activity and relatively low price. However, ruthenium catalysts often suffer from serious deactivation. Herein, a stable RuCl3-A/AC catalyst was prepared by applying a simple ammonia treatment during the impregnation process. The fresh and used ruthenium catalysts were comprehensively characterized using N2 sorption, NH3-temperature-programmed desorption (NH3-TPD), H2 temperature-programmed reduction (H2-TPR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). The results show that the RuCl3 species is identified as the active species, and the surface acidity of the RuCl3/AC catalyst is generated mainly from supported RuCl3 species, which can easily cause coke deposition. The enhancement of the stability of the RuCl3-A/AC catalyst is attributed to the formation of RuOx species and the decrease of the surface acidity.

Graphical abstract: Effect of acidity and ruthenium species on catalytic performance of ruthenium catalysts for acetylene hydrochlorination

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Publication details

The article was received on 13 Aug 2018, accepted on 22 Oct 2018 and first published on 25 Oct 2018


Article type: Paper
DOI: 10.1039/C8CY01677A
Citation: Catal. Sci. Technol., 2018, Advance Article
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    Effect of acidity and ruthenium species on catalytic performance of ruthenium catalysts for acetylene hydrochlorination

    X. Wang, G. Lan, H. Liu, Y. Zhu and Y. Li, Catal. Sci. Technol., 2018, Advance Article , DOI: 10.1039/C8CY01677A

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