介孔氧化铝制备方法对其载体及催化剂性能的影响

发布时间：2018-04-19 19:12

  本文选题：拟薄水铝石 + 介孔氧化铝载体　； 参考：《石油化工》2017年01期

【摘要】：分别采用醇铝法和沉淀法制备氧化铝,借助N_2物理吸附-脱附、XRD和SEM等技术对试样进行了表征,并对制备的载体进行对比。表征结果显示,醇铝法制备的拟薄水铝石纯度及结晶度更高,杂质少;小孔氧化铝孔径分布峰集中且峰形尖锐,峰宽较窄;大孔氧化铝孔径分布峰更宽甚至消失;氧化铝由粒径均匀且完整度高的球形颗粒聚集而成;小孔氧化铝载体孔径分布集中,没有大孔;而大孔氧化铝载体除介孔外还含有许多大孔。将两种方法制得的大孔氧化铝载体制备成催化剂,以渣油和蜡油混合油为原料,在氢分压15.5 MPa、氢油体积比650∶1、反应温度390℃、液态空速0.5 h~(-1)的条件下对催化剂进行评价。评价结果显示,醇铝法制备的催化剂具有较为优异的加氢脱硫、加氢脱氮、加氢脱残炭及加氢脱金属活性。
[Abstract]:Alumina was prepared by aluminol method and precipitation method. The samples were characterized by N _ 2 physical adsorption-desorption XRD and SEM, and the carrier was compared. The results of characterization show that the pseudo-boehmite prepared by aluminol method has higher purity and crystallinity and less impurity, the pore size distribution peak of porous alumina is concentrated and sharp, the peak width is narrow, the pore size distribution peak of macroporous alumina is wider or even disappeared. Alumina consists of spherical particles with uniform particle size and high integrity. The pore size distribution of the porous alumina carrier is concentrated and there is no macropore, while the macroporous alumina carrier contains many macropores in addition to the mesopore. The catalyst was prepared from macroporous alumina carrier prepared by two methods. The catalyst was evaluated under the conditions of hydrogen partial pressure 15.5 MPA, hydrogen / oil volume ratio 650: 1, reaction temperature 390 鈩，

本文编号：1774356