不同方法制备的乙醇胺还原胺化催化剂及其表征
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摘要
以Al_2O_3为载体,Ni-Cu双金属为活性组分,Ca为助剂,分别采用浸渍法、共沉淀法、微波-研磨法制备NiO-CuO-CaO/Al_2O_3复合氧化物催化剂,利用XRD、SEM、BET和IR表征了不同方法制备的催化剂的性能。结果表明,浸渍法是制备金属复合氧化物催化剂的适宜方法。采用浸渍法,在各组分理论设计含量相同的情况下,通过EDS分析确定了催化剂中W(NiO)∶W(CuO)∶W(CaO)=15∶3.5∶2.0。浸渍法可以得到相对较大的BET比表面积22.08 cm~2/g和相对较小的BJH孔径2.070 nm,理论上更适于乙醇胺还原胺化合成乙二胺的催化反应。
The NiO-CuO-CaO/Al_2O_3 composite oxide catalyst was prepared by impregnation method, CO-precipitation method and grinding microwave method with Al_2O_3 as carrier, Ni-Cu bimetal as active component and Ca as additive. And their performances were characterized by XRD, SEM, BET and IR. The results show that impregnation method is a suitable method for the preparation of composite oxide catalyst, and the W(NiO)∶W(CuO)∶W(CaO)=15∶3.5∶2.0 is determined by EDS analysis. The relatively large BET specific surface areas of 22.08 cm~2/g can be obtained by impregnation. The BJH pore volume of the composite oxide obtained by the above three methods is not very different. The BJH pore size of the composite oxide obtained by impregnation is 2. 070 nm, which is relatively small, in theory, it is more suitable for the catalytic rea-ction of ethanediamine from ethanolamine by reduction amination.
The NiO-CuO-CaO/Al_2O_3 composite oxide catalyst was prepared by impregnation method, CO-precipitation method and grinding microwave method with Al_2O_3 as carrier, Ni-Cu bimetal as active component and Ca as additive. And their performances were characterized by XRD, SEM, BET and IR. The results show that impregnation method is a suitable method for the preparation of composite oxide catalyst, and the W(NiO)∶W(CuO)∶W(CaO)=15∶3.5∶2.0 is determined by EDS analysis. The relatively large BET specific surface areas of 22.08 cm~2/g can be obtained by impregnation. The BJH pore volume of the composite oxide obtained by the above three methods is not very different. The BJH pore size of the composite oxide obtained by impregnation is 2. 070 nm, which is relatively small, in theory, it is more suitable for the catalytic rea-ction of ethanediamine from ethanolamine by reduction amination.
引文
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3 黄从军.广东化工,2013,40(16),122.
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5 张华良,杨师,洪超,等.应用化学,2017,34(5),557.
6 邓信忠,裴世红,程怡,等.精细石油化工,2013,30(1),8.
7 孔绡茗.某乙撑胺项目生产单元的自控工程设计.硕士学位论文.华东理工大学,2014.
8 梁淑东,黄科林,彭小玉,等.企业科技与发展,2010(10),16.
9 李华锋,孙果宋,雷朝快,等.化工进展,2010,29(S2),174.
10 黄科林,王则奋,孙果宋,等.化工技术与开发,2010,39(8),36.
11 王彦明,姚晓龙,王建明.广州化工,2010,38(10),49.
12 赵锋伟,杨建明,吕剑.化工生产与技术,2007,14(6),38.
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15 杨溢,兰昭洪,田保亮,等.石油化工,2012,41(5),603.
16 王德举,刘仲能,杨为民.精细化工,2017,34(6),601.
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18 孙果宋,韦志明,雷朝快,等.理化检验(化学分册),2011,47(6),711.
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23 罗羽裳,周继承,游志敏,等.化学工程与技术,2014,4(4),45.