蛋壳型钴基催化剂的费托合成反应性能  

Performance of Eggshell Co-Based Catalyst for Fischer-Tropsch Synthesis

作　　者：鲁丰乐[1] 邵倪[1] 张海涛[1] 应卫勇[1] 房鼎业[1] 

机构地区：[1]华东理工大学工业大型反应器工程教育部工程研究中心化学工程联合国家重点实验室,上海200237

出　　处：《石油化工》2010年第6期601-606,共6页Petrochemical Technology

基　　金：国家高技术研究发展计划项目(2006AA05A111)

摘　　要：采用BET,XRD,TG-DSC,TPR等方法对蛋壳型Co/SiO2催化剂进行了表征,并在直流流动等温积分反应器中考察了该催化剂的费托合成反应性能。表征结果显示,蛋壳型Co/SiO2催化剂为中孔结构,表面Co物种为Co3O4,适宜的焙烧温度为450℃,还原条件为不同H2含量的H2-N2混合气、程序升温,最高还原温度390℃。实验结果表明,反应压力升高,CO转化率增大,油和蜡生成量增加,C5+选择性提高;反应温度升高或n(H2)∶n(CO)增大,CO转化率增大,油和蜡生成量增加,但C5+烃选择性降低;气态空速增大,CO转化率降低,油和蜡生成量先增加后减少,C5+烃选择性降低。该催化剂用于费托合成的适宜工艺条件为:反应压力3.5MPa、反应温度225～235℃、n(H2)∶n(CO)=2.000～2.100、气态空速2000h-1。Eggshell Co-based catalyst for Fischer-Tropsch synthesis was characterized by means of BET, XRD, TG-DSC and TPR. Its performance was evaluated in a tubular-flow integral reactor. Characterization results showed mesopore structure of the catalyst. The appropriate calcinating temperature for the catalyst was at about 450 ℃ and reduction should be conducted under the conditions of H2-N2 mixed gas with different H2 contents, temperature programming and the maximum reduction temperature 390℃. Evaluation results showed that the increases of pressure, temperature and n （H2 ） ： n （CO）, and the decrease of GHSV would result in the increase of the CO conversion. The rise of pressure, and the decreases of temperature, n （ H2 ） ： n （CO） and GHSV would cause the increase of selectivity to C5^＋. Moreover, the increases of pressure, temperature and n （ Hi ） ： n （ CO ） would increase the amount of both oil and wax products, while the increase of GHSV would make the product amount of oil and wax firstly increase and then decrease. The appropriate conditions for the Fischer- Tropsch synthesis on the eggshell Co-based catalyst were proposed： pressure 3.5 MPa, temperature 225 -235 ℃, n（H2） ： n（CO） 2.000 -2. 100 and GHSV 2 000 h^-1.

关 键 词：费托合成 液体燃料 蛋壳型钴基催化剂 合成气 

分 类 号：TQ211[化学工程—有机化工]