摘要
采用浸渍法制备了Fe-Co-K/SiO2催化剂。在等温积分反应器中,在温度518~541K、压力1.00~2.60MPa、进料中n(H2):n(CO)=1.12~3.23、气态空速3000~4800h^-1的条件下,研究了在Fe-Co-K/SiO2催化剂上的F~T合成本征动力学。F-T合成中CO2的生成量很少,水煤气变换反应可不予考虑,生成烃为主要反应。以CO转化率的计算值和实验值的残差平方和为目标函数,采用Levenberg-Maquardt法对动力学参数进行优化,得到了F-T合成本征动力学模型参数,反应的活化能为78.9kJ/mol。在Fe-Co-K/SiO2催化剂上的F-T合成本征动力学模型的计算值与实验值的平均偏差为8.27%,模型的计算值与实验值符合较好。
Fe -Co -K/SiO2 catalyst was prepared by impregnation method. Intrinsic kinetics of Fischer- Tropsch( F- T) synthesis on the catalyst was studied in an isothermal integral reactor under conditions of temperature 518 -541 K, pressure 1.00 -2.66 MPa, n(H2) : n(CO) in feed 1.12 - 3.23 and gas hourly space velocity 3 000 - 4 800 h - 1. Since amount of CO2 produced in the F - T synthesis is negligible, water gas shift reaction can be ignored. Productions of hydrocarbons are main reactions in the F -T synthesis. Using residual sum of squares of experimental data and calculated data of CO conversion as object function, optimization of the model parameters was carded out by Levenberg - Marquardt method. Apparent activation energy of the reaction is 78.9 kJ/mol. The average deviation between experimental data and the calculated is 8.27 %. The model of intrinsic kinetics can truly simulate the experimental process.
出处
《石油化工》
EI
CAS
CSCD
北大核心
2007年第6期591-594,共4页
Petrochemical Technology
基金
高等学校博士学科点专项科研基金项目(20050251006)
关键词
F-T合成
本征动力学
铁-钴-钾/二氧化硅催化剂
氢气
一氧化碳
Fischer - Tropsch syntheses
intrinsic kinetics
iron - cobalt - potassium/silicon dioxide catalyst
hydrogen
carbon monoxide