第三次纳米自组装制备大孔主客体催化材料  

Preparation of macroporous host-guest catalytic material using third nano self-assembly

作　　者：张凯[1] 王鼎聪[2] 

机构地区：[1]辽宁石油化工大学,抚顺113001 [2]中国石化抚顺石油化工研究院,抚顺113001

出　　处：《中国科学：化学》2013年第11期1548-1556,共9页SCIENTIA SINICA Chimica

摘　　要：本文提出了第三次纳米自组装的正向胶束、反向胶束法，并利用其制备了一种大孔主客体催化材料．以二次纳米自组装Al2O3为主体，根据压汞法，正向胶束法制备的催化材料孔容为0．62～0．80cm^3／g、比表面积为123～137mZ／g、平均孔径为20～23．3nm，孔径分布大于30nm范围的可达58．69％，堆积密度为0．43—0．55g／cm^3，活性金属负载量可达36．99％；由氮气吸附法，反向胶柬法制备的催化材料具有0．74cm^3／g的孔容、262m2／g的比表面积、11．8nm的平均孔径．结果显示，活性金属以球形或棒状的结晶态存在于主体表面，其中，正向胶束法中为直径2-3nm的微晶态纳米粒子，反向胶束法中为直径0．1μm、长1-2．5μm的棒状体．采用催化裂化柴油和催化裂化重循环油（1：2，体积比）混合而得油品对FA．Z20进行50h加氢评价实验，其单位体积活性金属的脱硫率、脱氮率、脱芳烃率（四环、五环）分别为参比剂的4．6、2．1和4．7倍，初活性良好，具有较强的抗结焦性能．A macroporous catalytic host-guest material based on secondary self-assembly alumina was synthesized by micellar method and reverse micellar method of the third nano self-assembly. Characterization showed that the macrostructure of catalytic materials by micellar method with a pore volume of 0.62-0.80 cm^3/g, a specific surface area （BET） of 123-127 m^2/g, a average pore diameter of 20-23.3 nm and pore diameter lager than 30 nm reached to 58.69% （mercury intrusion porosimetry, MIP） were 2-3 nm microcrystal nanoparticles, processed a bulk density of 0.43-0.55 g/cm3 and a active metal of 36.99%. Meanwhile, the catalytic material by reverse micellar method possessed rod-like structure of a 2.5 ~tm long and 0.1 ~tm diameter, which owned a pore volume of 0.74 cm3/g, a specific surface area （BET） of 262 m2/g and a average pore diameter of 11.8 nm （nitrogen adsorption method, NAM）. A mixed oil of FCC diesel and FCC-HCO （2：1, volume ratio） was used in HDAr （four ring and five ring aromatic hydrocarbon） 50 h hydrogenation evaluation investigating the HDS, HDN and properties of FA-Z20. The catalytic performance of active metal per unit volume was as 4.6, 2.1 and 4.7 times as reference catalyst, which indicated a high initial activity and strong coking inhibitor ability.

关 键 词：纳米自组装 大孔 主客体催化材料 

分 类 号：O643.36[理学—物理化学] TB383.1[理学—化学]