In:
ChemPlusChem, Wiley, Vol. 80, No. 1 ( 2015-01), p. 196-201
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
2192-6506
,
2192-6506
DOI:
10.1002/cplu.201402176
Language:
English
Publisher:
Wiley
Publication Date:
2015
detail.hit.zdb_id:
2646595-4
