大比表面惰性Al2O3的合成及其载镍催化剂的评价

石油炼制与化工 ›› 2014, Vol. 45 ›› Issue (10): 57-62.

大比表面惰性Al2O3的合成及其载镍催化剂的评价

郭超^1,2,高俊斌¹,赵如松¹,靳广洲¹

1. 北京石油化工学院
2. 北京化工大学

收稿日期:2014-04-03 修回日期:2014-05-13 出版日期:2014-10-12 发布日期:2014-09-29
通讯作者: 高俊斌 E-mail:gaojunbin@bipt.edu.cn
基金资助:
国家重点基础研究发展规划项目

PREPARATION, CHARACTERIZATION OF LARGE SURFACE AREA INERT Al2O3 AND PERFORMANCE OF NiO/INERT-Al2O3 CATALYST

Received:2014-04-03 Revised:2014-05-13 Online:2014-10-12 Published:2014-09-29

摘要/Abstract

摘要： 以硝酸铝作为铝源、尿素为还原剂，采用微波辐射法制备了具有α物相的大比表面积惰性A12O3，考察了制备条件对生成惰性A12O3（DX- A12O3）的影响；采用浸渍法制备了NiO/DX-A12O3催化剂，并用微反实验装置考察了催化剂对模拟汽油中二烯烃的选择性加氢性能；采用XRD，BET，NH3-TPD，SEM等方法对合成的DX-A12O3及其催化剂进行了表征。结果表明，用微波法合成的DX-A12O3的物相以α-A12O3为主，形貌呈碎片状，比表面积可达到200 m2/g以上。适宜的合成条件为：硝酸铝与尿素摩尔比2.5～3.0，微波功率600W，辐射时间为触发反应的时间。NiO/DX-A12O3催化剂经加氢活化后，在常压、80℃、液时空速6 h-1、氢油体积比100:1的条件下，对模拟汽油中二烯烃的转化率及选择性均达到100%。

Abstract: The inert Al2O3 with α phase and high surface area was synthesized from Al(NO3)3?9H2O and urea by microwave radiation. The preparation conditions were studied. The NiO/inert-A12O3 catalyst with large surface was prepared by impregnation and its performance of selective hydrogenation for the diene in the model gasoline was evaluated using a micro-reactor. By means of XRD, BET, NH3-TPD and SEM, the synthesized inert-A12O3 and its catalyst were characterized. The results show that the morphology of the inert α phase A12O3, to a certain extent, is the fragment shape structure with surface area greater than 200m2/g. The suitable synthesis conditions are: mole ratio of Al(NO3)3?9H2O/urea 2.5-3.0, the microwave power of 600W, the radiation time about 10 minutes. After the catalyst with 9.87% NiO on the inert-A12O3 is activated with H2, its hydrogenation conversion and selectivity for the diene in the model gasoline achieve both about 100% at atmosphere pressure, 80 ℃, LHSV of 6 h-1, H2/oil ratio of 100/1.

郭超高俊斌赵如松靳广洲. 大比表面惰性Al2O3的合成及其载镍催化剂的评价[J]. 石油炼制与化工, 2014, 45(10): 57-62.