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- W2284906265 abstract "A detailed study of low-gold-content Au(0.25%)/C and Au(0.25%)Cu(4%)/C catalysts prepared via ultrasonic-assisted impregnation method is described and discussed. The addition of 4 wt% Cu to Au/C increases the initial activity and the Au loading is decreased to 0.25 wt%. Au(0.25%)Cu(4%)/C exhibits best catalytic performance with an acetylene conversion of 97.4% and the selectivity to VCM of more than 99% at a space velocity of 720 h−1 and 150 °C. The observations are rationalized in terms: (i) Au(0.25%)Cu(4%)/C exhibits relative larger specific surface area (562 m2/g) than Cu(4%)/C (385 m2/g), which provides more active sites for acetylene hydrochlorination; (ii) the reduction activation energy of Au3+ → Au0 in Au(0.25%)Cu(4%)/C (45.5 kJ/mol) is much higher than that of Au(0.25%)/C (35.6 kJ/mol), which indicates that the Au3+ species in Au(0.25%)Cu(4%)/C catalyst is more difficult to be reduced, the reduction activation energy of Cu+ → Cu0 in Au(0.25%)Cu(4%)/C (48.9 kJ/mol) is higher than that of Cu(4%)/C (43.1 kJ/mol) as a result of the electronic interaction between Au and Cu atoms; (iii) Au(0.25%)Cu(4%)/C possesses more Au3+ species (28%) than Au(0.25%)/C (16%) determined by XPS. Free-mercury low-gold-content Au(0.25%)Cu(4%)/C catalyst is environmental-friendly, making it a potentially green catalyst for acetylene hydrochlorination." @default.
- W2284906265 created "2016-06-24" @default.
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- W2284906265 date "2016-05-01" @default.
- W2284906265 modified "2023-10-01" @default.
- W2284906265 title "CuCl 2 promoted low-gold-content Au/C catalyst for acetylene hydrochlorination prepared by ultrasonic-assisted impregnation" @default.
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- W2284906265 doi "https://doi.org/10.1016/j.jiec.2016.02.011" @default.
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