The effect of alkali metals on the Ru/AC catalyst for acetylene hydrochlorination

• Published in: Catalysis communications Vol. 158; p. 106334
• Main Authors: Dai, Yuanyuan, Xu, Xiaolei, Zhu, Ruibo, Xie, Rongyong, Zhao, Changsen, Yan, Yizhuan, Niu, Qiang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2021; Elsevier
• Subjects: Acetylene hydrochlorination; Alkali metals; Catalytic activity; Ru-based catalyst; Acetylene hydrochlorination; Catalytic activity; Ru-based catalyst; Alkali metals
• ISSN: 1566-7367; 1873-3905
• DOI: 10.1016/j.catcom.2021.106334

A series of alkali metal (Li, Na, K, Rb and Cs) doped Ru/AC catalysts were prepared and were investigated for the acetylene hydrochlorination. The results showed a relationship between the catalytic activity and K loading, 0.5Ru0.5K/AC catalyst exhibited the highest acetylene conversion of 71.6% and vinyl chloride monomer productivity of 194 kgvcmkgRu−1 h−1 under 180 °C and C2H2 hourly space velocity (GHSV) of 180 h−1. The characterization results revealed that the addition of K promoted the dispersion of Ru species and inhibited the coke deposition. In addition, the VCM productivity increased with the atomic number of the alkali metal. [Display omitted] •K loading had a significant effect on the catalytic activity of Ru/AC for acetylene hydrochlorination.•The best loading of alkali metal was 0.5 wt% for 0.5Ru/AC catalyst.•The dispersing effect of K guaranteed the long-lasting high dispersion of Ru species.•The vinyl chloride monomer productivity increased with the atomic number of the alkali metal.