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助剂对超细CuO-ZnO-SiO_2催化剂性质和CO_2加氢反应性能的影响
引用本文:迟亚武,梁东白,杜鸿章,徐长海,林培滋,罗洪原,林励吾.助剂对超细CuO-ZnO-SiO_2催化剂性质和CO_2加氢反应性能的影响[J].分子催化,1996(6).
作者姓名:迟亚武  梁东白  杜鸿章  徐长海  林培滋  罗洪原  林励吾
作者单位:中国科学院大连化学物理研究所
摘    要:研究了9种助剂对用于CO2加氢反应的超细CuO-ZnO-SiO2催化剂性能的影响,并进行了XRD和TPR表征.结果表明,助剂影响超细催化剂的性质和催化性能,TiO2、CeO2、MgO和La2O3是CO2加氢合成甲醇的超细CuO-ZnO-SiO2催化剂体系的优良助剂.在含有不同助剂的CuO-ZnO-SiO2催化剂体系内存在CuO和ZnO晶相,但除CeO2以外,其它的助剂都可能以微晶或无定型的形式存在.TPR研究表明,添加的助剂除CeO2以外,都使超细CuO-ZnO-SiO2催化剂的还原温度提高,而且助剂对CuO-ZnO-SiO2催化剂活性的影响,按照助剂对CuO-ZnO-SiO2催化剂还原温度的影响进行了探讨

关 键 词:助剂  超细CuO-ZnO-SiO2催化剂  CO2加氢

Effect of Promoters on the Catalytic Performance and Properties of Ultrafine CuO ZnO SiO 2 Catalyst for Hydrogenation of CO 2
Chi Yawu,Liang Dongbai,Du Hongzhang,Xu Changhai,Lin Peizi,Luo Hongyuan,Lin Liwu.Effect of Promoters on the Catalytic Performance and Properties of Ultrafine CuO ZnO SiO 2 Catalyst for Hydrogenation of CO 2[J].Journal of Molecular Catalysis (China),1996(6).
Authors:Chi Yawu  Liang Dongbai  Du Hongzhang  Xu Changhai  Lin Peizi  Luo Hongyuan  Lin Liwu
Abstract:Hydrogenation of CO 2 were carried out over ultrafine CuO ZnO SiO 2 catalysts containing various promoters (BaO, K 2O, Al 2O 3, Na 2O, La 2O 3, Li 2O, TiO 2, MgO, CeO 2) prepared by alkoxide method and these catalysts were investigated by XRD and TPR (Temperature programmed reduction) techniques. Our studies showed that addition of promoters affected the activities and properties of ultrafine CuO ZnO SiO 2 catalysts, and TiO 2, CeO 2, MgO and La 2O 3 were favorable promoters for methanol synthesis from the hydrogenation of CO 2. In all catalyst systems, both CuO and ZnO exhibited crystalline patterns with similar intensity, and only a trace amount of CeO 2 was also detected, but other promoters could not be detected by XRD, which maybe existed in microcrystalline or amorphous state. Addtion of the above promoters except CeO 2 all caused increase of the reduction temperatures of ultrafine CuO ZnO SiO 2 catalysts. Possible relationship between activity and reduction temperature was discussed.
Keywords:Promoter  Ultrafine CuO  ZnO  SiO  2 catalyst  CO  2 hydrogenation
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