Journal
ACS CATALYSIS
Volume 4, Issue 9, Pages 3112-3116Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs500530f
Keywords
gold catalysis; hydrochlorination; mercury-free; synergistic catalysis; Au-Bi
Categories
Funding
- Ministry of Science and Technology of China [2008BAB41B02, 2012AA062901]
- National Science Foundation [CBET-1134535]
- U.S. Department of Energy, Office of Basic Energy Sciences, Chemical Sciences [DE-AC-02-06CH11357]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1134535] Funding Source: National Science Foundation
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Gold has been proposed as an environmentally friendly catalyst for acetylene hydrochlorination for vinyl chloride monomer synthesis by replacing the commercially used mercury catalyst. However, long life with excellent activity is difficult to achieve because gold is readily reduced to metallic nanoparticles. The stability of gold limits its industrial application. In this paper, we promoted gold with bismuth for the hydrochlorination of acetylene. It was found that the Bi promotion leads to partial reduction to AuC1, rather than the complete reduction of Au to metallic nanoparticles in the absence of Bi. The optimized catalyst with a molar ratio of Bi/Au =3:1 (0.3 wt % Au) showed comparable reactivity to 1.0 wt % Au catalyst and significantly improved stability. Furthermore, the gold bismuth catalyst had higher activity and stability than the commercial mercury catalyst, is less toxic and more environmental-friendly, making it a potentially green, mercury-free industrial catalyst for acetylene hydrochlorination. KEYWORDS: gold catalysis, hydrochlorination, mercury-free, synergistic catalysis, Au Bi
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