Amorphous Ni B/γ Al 2O 3 catalyst 1 is prepared with chemical reduction by KBH 4 solution after wetness impregnation and desiccation at 70 ℃ first and then at 110 ℃ for thorough water removal. Its higher catalytic ...Amorphous Ni B/γ Al 2O 3 catalyst 1 is prepared with chemical reduction by KBH 4 solution after wetness impregnation and desiccation at 70 ℃ first and then at 110 ℃ for thorough water removal. Its higher catalytic activity than amorphous Ni B/γ Al 2O 3 catalyst 2, prepared by conventional one step desiccation procedure at 110 ℃, is identified in liquid phase benzene hydrogenation to cyclohexane. Both catalysts are characterized by XRD and SEM, Ni B/γ Al 2O 3 catalyst 1 has a higher active specific surface area and dispersion degree, which can be assigned to more effective distribution of nickel salt over the support during desiccation, thus resulting in its superior activity in benzene hydrogenation.展开更多
As an endothermic hydrocarbon fuel,pentacyclo[6.3.1.02,7.03,5.09,11]dodecane has been synthesized from dicyclopentadiene catalyzed by Zn(Cu).Effects of catalyst ingredients,catalyst amount,temperature on yield of titl...As an endothermic hydrocarbon fuel,pentacyclo[6.3.1.02,7.03,5.09,11]dodecane has been synthesized from dicyclopentadiene catalyzed by Zn(Cu).Effects of catalyst ingredients,catalyst amount,temperature on yield of titled compound were investigated.The optimal conditions were: 15 ℃,n(DCPD)∶n(Zn(Cu))∶n(CH2I2)=1∶4∶8.Under the above conditions the conversion of dicyclopentadiene was 99.7% and the yield of pentacyclodocane reached 91.5%.展开更多
文摘Amorphous Ni B/γ Al 2O 3 catalyst 1 is prepared with chemical reduction by KBH 4 solution after wetness impregnation and desiccation at 70 ℃ first and then at 110 ℃ for thorough water removal. Its higher catalytic activity than amorphous Ni B/γ Al 2O 3 catalyst 2, prepared by conventional one step desiccation procedure at 110 ℃, is identified in liquid phase benzene hydrogenation to cyclohexane. Both catalysts are characterized by XRD and SEM, Ni B/γ Al 2O 3 catalyst 1 has a higher active specific surface area and dispersion degree, which can be assigned to more effective distribution of nickel salt over the support during desiccation, thus resulting in its superior activity in benzene hydrogenation.
文摘As an endothermic hydrocarbon fuel,pentacyclo[6.3.1.02,7.03,5.09,11]dodecane has been synthesized from dicyclopentadiene catalyzed by Zn(Cu).Effects of catalyst ingredients,catalyst amount,temperature on yield of titled compound were investigated.The optimal conditions were: 15 ℃,n(DCPD)∶n(Zn(Cu))∶n(CH2I2)=1∶4∶8.Under the above conditions the conversion of dicyclopentadiene was 99.7% and the yield of pentacyclodocane reached 91.5%.
