The Cu/Cr base catalysts were prepared by impregnation. XRD and TPR technology were applied to characterize the catalysts. The result showed that the Cu/Cr base catalysts performed much better than the conventional Cu...The Cu/Cr base catalysts were prepared by impregnation. XRD and TPR technology were applied to characterize the catalysts. The result showed that the Cu/Cr base catalysts performed much better than the conventional Cu/Zn/Al catalysts. The stability of the catalysts was enhanced by promoters such as K, Mg, Ni, Y. But the promoters reduced the initial activity of the catalysts. The promoters except Y improved the selectivity apparently.展开更多
逆水汽变换反应是实现CO_2的资源化循环利用的重要反应,对CO_2的减排具有战略意义。Cr基催化剂在逆水汽变换反应中表现出很好的催化活性,在GSHV=22000 m L/(g·h),P=1 atm,n(H2)︰n(CO_2)=1︰1的条件下,400℃到800℃温度区间,CO选...逆水汽变换反应是实现CO_2的资源化循环利用的重要反应,对CO_2的减排具有战略意义。Cr基催化剂在逆水汽变换反应中表现出很好的催化活性,在GSHV=22000 m L/(g·h),P=1 atm,n(H2)︰n(CO_2)=1︰1的条件下,400℃到800℃温度区间,CO选择性一直保持在100%,未发现其他的副产物产生。对比Cr/ZrO_2,Cr/Al_2O_3,Cr/SiO_2三种催化剂的活性差异,Cr/ZrO_2表现出最好的催化活性,不同铬含量Cr/ZrO_2催化剂活性顺序为5%Cr>1%Cr>10%Cr。TPR和Raman的结果表明催化剂活性与催化剂表面Cr(Ⅵ)的形式有关。展开更多
文摘The Cu/Cr base catalysts were prepared by impregnation. XRD and TPR technology were applied to characterize the catalysts. The result showed that the Cu/Cr base catalysts performed much better than the conventional Cu/Zn/Al catalysts. The stability of the catalysts was enhanced by promoters such as K, Mg, Ni, Y. But the promoters reduced the initial activity of the catalysts. The promoters except Y improved the selectivity apparently.
文摘逆水汽变换反应是实现CO_2的资源化循环利用的重要反应,对CO_2的减排具有战略意义。Cr基催化剂在逆水汽变换反应中表现出很好的催化活性,在GSHV=22000 m L/(g·h),P=1 atm,n(H2)︰n(CO_2)=1︰1的条件下,400℃到800℃温度区间,CO选择性一直保持在100%,未发现其他的副产物产生。对比Cr/ZrO_2,Cr/Al_2O_3,Cr/SiO_2三种催化剂的活性差异,Cr/ZrO_2表现出最好的催化活性,不同铬含量Cr/ZrO_2催化剂活性顺序为5%Cr>1%Cr>10%Cr。TPR和Raman的结果表明催化剂活性与催化剂表面Cr(Ⅵ)的形式有关。
