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dc.contributor.author杨冬丽
dc.contributor.author林敬东
dc.contributor.author黄桂玉
dc.contributor.author廖代伟
dc.date.accessioned2016-05-17T02:50:39Z
dc.date.available2016-05-17T02:50:39Z
dc.date.issued2009
dc.identifier.citation厦门大学学报(自然科学版),2009,(5):89-93
dc.identifier.issn0438-0479
dc.identifier.otherXDZK200905020
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/106104
dc.description.abstract氧化镁为载体的钌基氨合成催化剂具有潜在的工业应用前景,已引起了人们极大的关注.制备了5种钌基催化剂ru/MgO、ru/γ-Al2O3、k-ru/MgO、bA-ru/MgO和k-bA-ru/MgO,在V(n2)∶V(H2)=1∶3,2.0MPA,24000H-1和653~873k反应条件下,评价了它们的合成氨催化活性,并对相关催化剂进行了bET和Xrd表征.结果表明:ru/MgO的最高活性约为ru/γ-Al2O3的2倍,且最高活性反应温度还低了20k;bA组份的添加有利于降低ru/MgO基催化剂的最高活性温度;k-bA-ru/MgO在653k、bA-ru/MgO在773k、k-ru/MgO和ru/MgO在813k以上使用时,将更有利于催化活性的发挥.因此,对于ru/MgO基催化剂而言,促进剂的添加应根据拟采用的操作温度来决定.
dc.description.abstractThe ruthenium-based catalyst supported on magnesia for ammonia synthesis has attracted a great attention since it exhibited a potential prospect for industrial application.The ruthenium-based catalysts,Ru/MgO,Ru/γ-Al2O3,K-Ru/MgO,Ba-Ru/MgO and K-Ba-Ru/MgO were prepared and their ammonia synthesis activities were evaluated under reaction conditions of V(N2)∶V(H2)=1∶3,2.0 MPa,24 000 h-1 and 653--873 K.The relative catalysts were characterized by special surface measurement(BET)and X-ray diffraction spectroscopy(XRD).The results show that the maximum activity of Ru/MgO is about twice of that of Ru/γ-Al2O3 and the reaction temperature is lower 20 K than the Ru/γ-Al2O3.The barium component is favorable for lowering the reaction temperature of the Ru/MgO-based catalysts with the maximum activity.In order to play extremely the catalytic activities,the better operation temperature is 653 K for K-Ba-Ru/MgO,773 K for Ba-Ru/MgO and over 813 K for K-Ru/MgO and Ru/MgO,respectively.It is suggested that the addition of promoters should be decided by the desired operation temperatures for the Ru/MgO-based catalysts.
dc.description.sponsorship国家自然科学基金(20673089);国家重点基础研究发展计划项目(2009CB939804)资助
dc.language.isozh_CN
dc.subject合成氨
dc.subjectRu/MgO基催化剂
dc.subject促进剂
dc.subjectammonia synthesis
dc.subjectRu/MgO-based catalysts
dc.subjectpromoter
dc.titleRu/MgO基合成氨催化剂
dc.title.alternativeRu/MgO-based Catalysts for Ammonia Synthesis
dc.typeArticle


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