A highly active Cu/Zn/Al/Zr fibrous catalyst was developed for methanol synthesis from CO2 hydrogenation.Various factors that affect the activity of the catalyst,including the reaction temperature,pressure and space v...A highly active Cu/Zn/Al/Zr fibrous catalyst was developed for methanol synthesis from CO2 hydrogenation.Various factors that affect the activity of the catalyst,including the reaction temperature,pressure and space velocity,were investigated.The kinetic parameters in Graaf's kinetic model for methanol synthesis were obtained.A quasistable economical process for CO2 hydrogenation through CO circulation was simulated and higher methanol yield was obtained.展开更多
Steam reforming(SR) of dimethyl ether(DME) was investigated for the production of hydrogen for fuel cells.The activity of a series of solid acids for DME hydrolysis was investigated.The solid acid catalysts were ZSM-5...Steam reforming(SR) of dimethyl ether(DME) was investigated for the production of hydrogen for fuel cells.The activity of a series of solid acids for DME hydrolysis was investigated.The solid acid catalysts were ZSM-5 [Si/Al = 25,38 and 50:denoted Z(Si/Al)] and acidic alumina(γ-Al2O3) with an acid strength order that was Z(25)>Z(38)>Z(50)>γ-Al2O3.Stronger acidity gave higher DME hydrolysis conversion.Physical mixtures containing a CuO-ZnO-Al2O3-ZrO2 catalyst and solid acid catalyst to couple DME hydrolysis and methanol SR were used to examine the acidity effects on DME SR.DME SR activity strongly depended on the activity for DME hydrolysis.Z(25) was the best solid acid catalyst for DME SR and gave a DME conversion>90% [T = 24℃,n(H2O)/n(DME) = 3.5,space velocity=1179 ml·(g cat)-1·h-1,and P=0.1MPa].The influences of the reaction temperature,space velocity and feed molar ratio were studied.Hydrogen production significantly depended on temperature and space velocity.A bifunctional catalyst of CuO-ZnO-Al2O3-ZrO2 catalyst and ZSM-5 gave a high H2 production rate and CO2 selectivity.展开更多
基金Supported by the National Natural Science Foundation of China （20576060, 20606021）, and the Specialized Research Fund for the Doctoral Program of Higher Education （20050003030）.
文摘A highly active Cu/Zn/Al/Zr fibrous catalyst was developed for methanol synthesis from CO2 hydrogenation.Various factors that affect the activity of the catalyst,including the reaction temperature,pressure and space velocity,were investigated.The kinetic parameters in Graaf's kinetic model for methanol synthesis were obtained.A quasistable economical process for CO2 hydrogenation through CO circulation was simulated and higher methanol yield was obtained.
基金Supported by the Ministry of Science and Technology （G1999022408） and the National Natural Science Foundation of China （20773075）.
文摘Steam reforming(SR) of dimethyl ether(DME) was investigated for the production of hydrogen for fuel cells.The activity of a series of solid acids for DME hydrolysis was investigated.The solid acid catalysts were ZSM-5 [Si/Al = 25,38 and 50:denoted Z(Si/Al)] and acidic alumina(γ-Al2O3) with an acid strength order that was Z(25)>Z(38)>Z(50)>γ-Al2O3.Stronger acidity gave higher DME hydrolysis conversion.Physical mixtures containing a CuO-ZnO-Al2O3-ZrO2 catalyst and solid acid catalyst to couple DME hydrolysis and methanol SR were used to examine the acidity effects on DME SR.DME SR activity strongly depended on the activity for DME hydrolysis.Z(25) was the best solid acid catalyst for DME SR and gave a DME conversion>90% [T = 24℃,n(H2O)/n(DME) = 3.5,space velocity=1179 ml·(g cat)-1·h-1,and P=0.1MPa].The influences of the reaction temperature,space velocity and feed molar ratio were studied.Hydrogen production significantly depended on temperature and space velocity.A bifunctional catalyst of CuO-ZnO-Al2O3-ZrO2 catalyst and ZSM-5 gave a high H2 production rate and CO2 selectivity.
