Hydrogenolysis of Glycerol to Propylene Glycol on Nanosized Cu-Zn-Al Catalysts Prepared Using Microwave Process.
Cu-Zn-Al catalysts were prepared using microwave-assisted process and co-precipitation methods. The prepared catalysts were characterized by XRD, BET, XPS and TPD of ammonia and their catalytic activity for the hydrogenolysis of glycerol to propylene glycol was also examined. The XRD patterns of Cu/Zn/Al mixed catalysts show CuO and ZnO crystalline phase regardless of preparation method. The highest glycerol hydrogenolysis conversion is obtained with the catalyst having a Cu/Zn/Al ratio of 2:2:1. Hydrogen pre-reduction of catalysts significantly enhanced both glycerol conversions and selectivity to propylene glycol. The glycerol conversion increased with an increase of reaction temperature. However, the selectivity to propylene glycol increased with an increase of temperature, and then declined to 30.5% at 523 K.
Dong Won
DW
Kim
Sang Ho
SH
Ha
Myung Jun
MJ
Moon
Kwon Taek
KT
Lim
Young Bok
YB
Ryu
Sun Do
SD
Lee
Man Sig
MS
Lee
Seong-Soo
SS
Hong
D002384:Catalysis; D060326:Chemistry Techniques, Synthetic; D005990:Glycerol / Q000737:chemistry*; D006358:Hot Temperature; D006859:Hydrogen; D019216:Metals, Heavy / Q000737:chemistry*; D008872:Microwaves; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D019946:Propylene Glycol / Q000737:chemistry*; D014961:X-Ray Diffraction
D019216:Metals, Heavy; D019946:Propylene Glycol; D006859:Hydrogen; D005990:Glycerol