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1453560 
Journal Article 
Promoting Effect of ZnO or K2O on Cu/SiO2-Al2O3 Catalyst for Vapor-Phase Synthesis of 3-Methylindole from Glycerol and Aniline 
Zhang Yue; Sun Wei; Shi Lei; Sun Qi 
2012 
1 
Cuihua Xuebao / Chinese Journal of Catalysis
ISSN: 0253-9837 
33 
6 
1055-1060 
WOS:000305108900021 
The promoting effect of ZnO or K2O promoter on Cu/SiO2-Al2O3
catalyst for the vapor-phase synthesis of 3-methylindole from glycerol and aniline was studied.
The catalyst samples were characterized by X-ray diffraction, transmission electron microscopy,
H-2 temperature-programmed reduction, NH3 temperature-programmed desorption, and
thermogravimetric and differential thermal analysis. The results indicated that the addition of
an appropriate amount ZnO or K2O to Cu/SiO2-Al2O3 increased the activity and selectivity as well
as the stability of the catalyst remarkably, and ZnO exhibited better efficiency than K2O. ZnO
not only reinforced the interaction between the active component and the support, promoted the
dispersion of copper particles on the support, but also inhibited the sintering of copper
particles during the reaction. K2O could suppress the sintering of copper particles during the
reaction to some extent although it did not improve the dispersion of copper particles on the
support. The addition of ZnO or K2O to Cu/SiO2-Al2O3 increased the number of weak acid sites in
different degrees, which promoted the synthesis of 3-methylindole. 
copper; silica; alumina; zinc oxide; potassium oxide; 3-methylindole; glycerol; aniline 
IRIS
• Methanol (Non-Cancer)
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