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Activated‐Carbon‐Supported Gold–Cesium(I) as Highly Effective Catalysts for Hydrochlorination of Acetylene to Vinyl Chloride
Author(s) -
Zhao Jia,
Xu Jiangtao,
Xu Jinhui,
Ni Jun,
Zhang Tongtong,
Xu Xiaoliang,
Li Xiaonian
Publication year - 2015
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402176
Subject(s) - acetylene , vinyl chloride , catalysis , bimetallic strip , chemistry , inorganic chemistry , selectivity , activated carbon , chloride , carbon fibers , desorption , adsorption , organic chemistry , materials science , composite number , copolymer , composite material , polymer
The synthesis of vinyl chloride from acetylene by hydrochlorination has gained tremendous interest in coal‐based chemistry. Bimetallic gold–cesium(I)/activated carbon (AuCs I /AC) catalysts were found to have a higher catalytic activity and stability for acetylene hydrochlorination when compared with gold catalysts. Over 1 Au4 Cs I /AC catalysts, the maximum conversion of acetylene was 94 % and there was only 5 % C 2 H 2 conversion loss after 50 h of running time. Moreover, the 1 Au4 Cs I /AC catalyst delivered a stable performance during a 500 h test with the conversion of acetylene and the selectivity of vinyl chloride reaching more than 99.8 and 99.9 %, respectively. Temperature‐programmed reduction of H 2 , temperature‐programmed desorption of C 2 H 2 , and X‐ray photoelectron spectroscopy techniques were further applied to detect structural information on the AuCs I /AC catalysts. Additives of CsCl indeed stabilized the catalytically active Au 3+ species and inhibited the reduction of Au 3+ to Au 0 , thereby improving the activity and long‐term stability of gold‐based catalysts.