大比表面积惰性Al_2O_3的合成及其载镍催化剂的评价  

PREPARATION,CHARACTERIZATION OF LARGE SURFACE AREA INERT Al_2O_3 AND PERFORMANCE OF NiO/INERT-Al_2O_3 CATALYST

作　　者：郭超[1,2] 高俊斌[1] 赵如松[1] 靳广洲[1] 

机构地区：[1]北京石油化工学院,北京102617 [2]北京化工大学

出　　处：《石油炼制与化工》2014年第10期57-62,共6页Petroleum Processing and Petrochemicals

基　　金：国家重点基础研究发展规划项目(2012CB21500202)资助

摘　　要：以硝酸铝为铝源、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,NH3TPD,SEM等方法对合成的DX Al2O3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αA12O3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600 W,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6h-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％.The inert Al2O3 with a phase and high surface area was synthesized from Al（NO3）·9H2O and urea by microwave radiation. The preparation conditions were studied. The NiO/inert-Al2O3 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-Al2O3 and its catalyst were characterized. The results show that the morphology of the inert a phase Al2O3, to a certain extent, is the fragment shape structure with surface area greater than 200 m2/g. The suitable synthesis conditions are： molar ratio of Al（NO3）3 · 9H2O/urea 2.5--3.0, the microwave power of 600 W, the radiation time about 10 minutes. After the catalyst with 9.87 % NiO on the inert-Al2O3 is activated with H2, its hydrogenation conversion and se- lectivity 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.

关 键 词：惰性氧化铝 微波辐射 载镍催化剂 二烯烃 选择性加氢 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]