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首页> 外文期刊>Catalysis science & technology >Effect of acidity and ruthenium species on catalytic performance of ruthenium catalysts for acetylene hydrochlorination
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Effect of acidity and ruthenium species on catalytic performance of ruthenium catalysts for acetylene hydrochlorination

机译：酸度和钌物种的影响钌催化剂的催化性能乙炔氢氯化反应

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摘要

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 N-2 sorption, NH3-temperature-programmed desorption (NH3-TPD), H-2 temperature-programmed reduction (H-2-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.
机译：Carbon-supported钌催化剂是有前途的无汞催化剂乙炔氢氯化反应,由于他们的活动和高相对较低的价格。经常遭受严重的失活催化剂。在此,一个稳定RuCl3-A / AC催化剂制备通过应用一个简单的氨治疗期间浸渍的过程。钌催化剂全面使用n -吸附特征,NH3-temperature-programmed解吸(NH3-TPD),2程序升温还原(H-2-TPR),热重分析(TGA)和x射线光电子能谱(XPS)。表明RuCl3物种被认为是活跃的物种,和表面酸性的主要从生成RuCl3 / AC催化剂支持RuCl3物种,可以很容易地导致可口可乐沉积。RuCl3-A / AC催化剂是归因于形成RuOx物种的减少表面酸性。

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