The gas-phase dehydration of glycerol was conducted over HPW/MCM-41 catalysts,which were prepared by impregnation of different amount of H3PW（12）O（40）（HPW）on the MCM-41 support.The samples were characterized by ...The gas-phase dehydration of glycerol was conducted over HPW/MCM-41 catalysts,which were prepared by impregnation of different amount of H3PW（12）O（40）（HPW）on the MCM-41 support.The samples were characterized by XRD,N2 physisorption,FTIR,NH3-TPD,and pyridine-FTIR measurements.N2 physisorption results suggested that the uniform framework of MCM-41 could still be well maintained after modified with HPW.Pyridine-FTIR experiments indicate that HPW modified MCM-41 can generate rich Br？nsted acid sites.Moreover,Brnsted acid sites facilitated to improve acrolein selectivity.Under the optimized reaction conditions：40wt%HPW loading,20%glycerol concentration,and 320℃reaction temperature,the glycerol conversion and acrolein selectivity reach 85%and 80%,respectively.展开更多
基金Funded by the National Natural Science Foundation of China(No.21303154)
文摘The gas-phase dehydration of glycerol was conducted over HPW/MCM-41 catalysts,which were prepared by impregnation of different amount of H3PW（12）O（40）（HPW）on the MCM-41 support.The samples were characterized by XRD,N2 physisorption,FTIR,NH3-TPD,and pyridine-FTIR measurements.N2 physisorption results suggested that the uniform framework of MCM-41 could still be well maintained after modified with HPW.Pyridine-FTIR experiments indicate that HPW modified MCM-41 can generate rich Br？nsted acid sites.Moreover,Brnsted acid sites facilitated to improve acrolein selectivity.Under the optimized reaction conditions：40wt%HPW loading,20%glycerol concentration,and 320℃reaction temperature,the glycerol conversion and acrolein selectivity reach 85%and 80%,respectively.
