有序介孔氧化铝负载钴基催化剂的费-托合成催化性能  

Catalytic Performance of Ordered Mesoporous Alumina Supported Cobalt Catalysts for Fischer-Tropsch Synthesis

作　　者：李金林[1] 李利华[1] 

机构地区：[1]中南民族大学催化材料科学湖北省暨国家民委-教育部共建重点实验室,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2015年第1期1-5,共5页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(21073238)

摘　　要：以P123为模板剂,采用挥发诱导自组装法(EISA)合成了有序介孔氧化铝(OMA),并以其为载体,制备了钴基费-托合成催化剂.分别采用XRD、TEM、氮气物理吸附-脱附、氧滴定等方法对载体和催化剂进行了表征,考察了不同焙烧温度对OMA的孔结构和晶型的影响,以及所合成的OMA的孔结构和晶型对其负载钴基催化剂的费-托合成催化性能的影响.结果表明:OMA的比表面积随着焙烧温度的提高先增大后减小而孔径则先减小后不变,当焙烧温度升高至700℃后,OMA逐渐由无定形的氧化铝转化为γ-氧化铝.载体焙烧温度为800℃的催化剂具有最高的还原度和分散度而表现最佳的费-托合成催化性能.Ordered mesoporous alumina（ OMA） was successfully synthesized with evaporation-induced self-assembly（ EISA） method by using P123 as template agent. The OMA was then used as a support to prepare cobalt（ Co） based Fischer-Tropsch synthesis catalyst. The support and the catalysts were characterized by XRD,TEM,N2 adsorptiondesorption and O2 Titration. The effect of calcination temperature on the pore structure and crystal form of OMA,and in turn the effect of pore structure and the crystal form on the catalytic performance were investigated. The results indicated that the surface area of OMA first increased then decreased,but the pore size first decreased then kept constant with the increase of calcination temperature. When the calcination temperature increased to 700℃,the structure of OMA gradually transformed from amorphous alumina to γ-alumina. The catalyst calcined at 800℃ showed the best catalytic performance,which may be attributed to its high reduction degree and high degree of dispersion.

关 键 词：费-托合成 钴基催化剂 有序介孔氧化铝 焙烧温度 

分 类 号：O643.361[理学—物理化学]