氧化镍含量对渣油加氢脱金属催化剂性能的影响  

Impact of nickel oxide content on the performances of residue hydrodemetallization catalyst

作　　者：刘文洁[1] 张庆军[1] 隋宝宽[1] 袁胜华[1] 

机构地区：[1]中国石油化工股份有限公司抚顺石油化工研究院,辽宁省抚顺市113001

出　　处：《炼油技术与工程》2017年第12期48-50,共3页Petroleum Refinery Engineering

摘　　要：制备了活性金属氧化钼含量相近,氧化镍含量逐渐增大的3种渣油加氢脱金属催化剂C1,C2,C3。采用X射线衍射、氮吸附脱附、红外光谱、氢气程序升温还原等方法分析了催化剂的物相结构、孔性质、酸类型和酸强度分布、还原性等。结果表明:催化剂C2的X射线衍射谱图中没有明显的MoO_3的特征峰,催化剂C3的氧化镍含量较大,在2θ为26.5°处出现了比催化剂C1更加明显的MoO_3的特征峰。载体相同的情况下,浸渍不同含量的氧化镍,对催化剂的孔性质影响较小,3种催化剂的比表面积为145 m^2/g左右,孔体积大约为0.67 mL/g,最可几孔径均为17.5 nm。3种催化剂的低温酸中Lewis酸含量随着催化剂中氧化镍含量的增加而增加,Bronsted酸含量则是先增加后略有降低。催化剂C2比催化剂C1的还原温度略高,还原峰面积明显增大,催化剂C3的氧化镍含量较高,约340℃出现钼和镍相互作用物种的还原峰,与催化剂C1和C2相比,还原峰向低温方向移动,催化剂C3较催化剂C1和C2易于还原。Three kinds of hydrodemetallization catalysts i. e. C1,C2 and C3 with similar content of molybdenum oxide and increasing amount of nickel oxide were prepared. Techniques such as X-ray diffraction,nitrogen adsorption-desorption,infrared spectroscopy,hydrogen temperature programmed reduction were applied to characterize the crystal phase,pore structure,acidity,acid strength distribution and reducibility,etc.The results showed that the typical characteristic peak of MoO3 did not appear in the X-ray diffraction pattern of catalyst C2. The typical characteristic peak of MoO3 was more obvious than that of catalyst C1 in 26. 5° in the X ray diffraction pattern of catalyst C3 with the highest nickel oxide. When the catalysts had same carrier,the impregnation of different contents of nickel oxide had little effect on the pore properties of the catalysts.The specific surface area of three catalysts was around 145 m^2/g,the pore volume was about 0. 67 mL/g,the most probable pore diameter was 17. 5 nm. Comparing the low-temperature acid of the three catalysts,the strength of L acid increased with the increasing nickel oxide in the catalysts,while the strength of B acid increased first and then decreased slightly. The reduction temperature of the catalyst C2 was slightly higher than that of the catalyst C1. The area of reduction peak of the catalyst C2 was obviously larger than that of the catalyst C1. The reduction peak of the molybdenum and nickel interaction species of catalyst C3 with the highest content of nickel oxide appeared at 340 ℃. As compared with catalysts C1 and C2,the reduction peak of the catalyst C3 was shifted to low temperature. The catalyst C3 was easier to reduce than the catalyst C1 and C2.

关 键 词：渣油加氢 脱金属催化剂 活性金属 氧化钼 氧化镍 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]