NDLI: Strontium promoted activated carbon-supported gold catalysts for non-mercury catalytic acetylene hydrochlorination

Content Provider	Royal Society of Chemistry (RSC)
Author	Li, Wei Li, Guangbi Zhang, Jinli
Copyright Year	2016
Abstract	Bimetallic gold–strontium catalysts were prepared and assessed for the effect of a Sr(II) additive on the catalytic performance of gold-based catalysts for acetylene hydrochlorination, combined with characterization using N2 adsorption/desorption, thermogravimetric analysis, temperature-programmed reduction/desorption, powder X-ray diffraction, transmission electron microscopy, atomic absorption spectrophotometry and X-ray photoelectron spectroscopy. The optimal catalytic performance is obtained over an Au1Sr(II)1/AC catalyst with acetylene conversion of 87.7% and selectivity for VCM of 99.8%, after 20 h on stream under the conditions of a temperature of 180 °C, a C2H2 gas hourly space velocity (GHSV) of 762 h−1, and a feed volume ratio HCl/C2H2 of 1.15, which is an increase of 24.3% compared with acetylene conversion of 63.4% after 20 h on stream under the same conditions over a monometallic Au/AC catalyst. It is indicated that the addition of Sr(II) can disperse the Au species well and inhibit carbon deposition on the catalyst surface; the Sr(II) additive can enhance the adsorption of the two reactants, acetylene and hydrogen chloride, on the catalyst and inhibit the reduction of Au3+ to Au0 during the preparation and reaction, consequently enhancing the catalytic activity and long-term stability of gold-based catalysts.
Starting Page	3230
Ending Page	3237
Page Count	8
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	6
Issue Number	9
Journal	Catalysis Science & Technology
DOI	10.1039/c5cy01808k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Temperature-programmed reduction Transmission electron microscopy Adsorption Thermogravimetric analysis Atomic absorption spectroscopy Photoemission spectroscopy Stellar kinematics Hydrogen chloride Carbon X-ray photoelectron spectroscopy Acetylene
Content Type	Text
Resource Type	Article
Subject	Catalysis

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