Using Ti0.5Zr0.5O2(TZ) as carrier, the CuO/TZ catalysts were prepared by impregnation method with Cu(NO3)2 as active component, their activities were investigated by using a microreactor-GC NO+CO reaction system, TPR,...Using Ti0.5Zr0.5O2(TZ) as carrier, the CuO/TZ catalysts were prepared by impregnation method with Cu(NO3)2 as active component, their activities were investigated by using a microreactor-GC NO+CO reaction system, TPR, TG-DTA, XRD and NO-TPD. Experimental results showed that the fine crystallite of CuO on TZ played an important role in NO+CO reaction besides the highly dispersed Cu species, and crystalline ZrTiO4 enhanced the activities of catalysts. NO-TPD analysis inferred that the high temperature adsorption site was probably Cu2+ and low temperature adsorption site was Cu0.展开更多
采用共沉淀法制备了Zr0.5Ti0.5O2载体材料,将其掺杂在CeO2-Al2O3(CA)基催化剂中,并对其催化活性进行了超临界裂解测试,采用全自动吸附仪、X射线衍射(XRD)、透射电镜(TEM)、程序升温脱附(TPD)等方法对催化剂进行了表征.实验结果表明,催...采用共沉淀法制备了Zr0.5Ti0.5O2载体材料,将其掺杂在CeO2-Al2O3(CA)基催化剂中,并对其催化活性进行了超临界裂解测试,采用全自动吸附仪、X射线衍射(XRD)、透射电镜(TEM)、程序升温脱附(TPD)等方法对催化剂进行了表征.实验结果表明,催化剂能够明显降低裂解反应的温度,600°C CA基催化剂产气率是热裂解的2.8倍,掺杂Zr0.5Ti0.5O2载体材料的CA基催化剂是热裂解的4.0倍,650°C时,掺杂Zr0.5Ti0.5O2载体材料的CA基催化剂热沉提高了0.55 MJ kg 1.BET结果表明,掺杂Zr0.5Ti0.5O2载体后催化剂出现双孔结构,部分小孔的出现使得乙烯的选择性提高;NH3-TPD结果表明,掺杂Zr0.5Ti0.5O2载体材料后,催化剂强酸位的酸量增加了4.0倍,催化剂表现出更强的表面酸性和更集中的强酸酸中心密度,有利于裂解多产烯烃.展开更多
文摘Using Ti0.5Zr0.5O2(TZ) as carrier, the CuO/TZ catalysts were prepared by impregnation method with Cu(NO3)2 as active component, their activities were investigated by using a microreactor-GC NO+CO reaction system, TPR, TG-DTA, XRD and NO-TPD. Experimental results showed that the fine crystallite of CuO on TZ played an important role in NO+CO reaction besides the highly dispersed Cu species, and crystalline ZrTiO4 enhanced the activities of catalysts. NO-TPD analysis inferred that the high temperature adsorption site was probably Cu2+ and low temperature adsorption site was Cu0.
文摘采用共沉淀法制备了Zr0.5Ti0.5O2载体材料,将其掺杂在CeO2-Al2O3(CA)基催化剂中,并对其催化活性进行了超临界裂解测试,采用全自动吸附仪、X射线衍射(XRD)、透射电镜(TEM)、程序升温脱附(TPD)等方法对催化剂进行了表征.实验结果表明,催化剂能够明显降低裂解反应的温度,600°C CA基催化剂产气率是热裂解的2.8倍,掺杂Zr0.5Ti0.5O2载体材料的CA基催化剂是热裂解的4.0倍,650°C时,掺杂Zr0.5Ti0.5O2载体材料的CA基催化剂热沉提高了0.55 MJ kg 1.BET结果表明,掺杂Zr0.5Ti0.5O2载体后催化剂出现双孔结构,部分小孔的出现使得乙烯的选择性提高;NH3-TPD结果表明,掺杂Zr0.5Ti0.5O2载体材料后,催化剂强酸位的酸量增加了4.0倍,催化剂表现出更强的表面酸性和更集中的强酸酸中心密度,有利于裂解多产烯烃.
