摘要
在固定床反应器上进行了Fe-Mn超细粒子催化剂F -T合成反应动力学研究。以碳化物机理为基础推导出简化的F -T合成产物生成动力学模型 : RCnH2n + 2 =kHC5PH2 (1-α)αn在温度 5 76～ 6 10K ,压力 1 5～ 2 5MPa ,空速 2 5 0 0～ 45 0 0h-1和原料气H2 /CO比为 2 0的条件下进行动力学试验 ,通过模型拟合 ,求得动力学方程参数 : kHC5=kHC5(5 80K)exp[EaR(1T - 15 80 ) ]其中 ,kHC5(5 80K) =2 82× 10 -6mol/ (mlcat·MPa·s) ,Ea=6 6 0 7kJ/mol结果表明 ,该模型与实验值拟合较好 ,链增长几率α与温度和反应器内H2 /CO比具有简单的关系 :α =1/ (1+ρRHC)。
The kinetic study of F-T synthesis over an Fe-Mn ultrafine particle catalyst was carried out in a fixed bed reactor Experimental conditions were varied as follows: reaction temperature of 576～610K, pressure of 1 5～2 5MPa, gas hourly space velocity of 2500～4500h -1 and H 2/CO feed ratio of 2 0 A simplified kinetic model was derived for hydrocarbon formation of F-T synthesis based on the carbide mechanism: R C nH 2n+2 =k HC5 P H 2 (1-α)α n The parameters for the kinetic model were obtained by simulating with experimental data: k HC5 =k HC5 (580K)exp[E aR(1T-1580)] wherek HC5 (580K)=2 82×10 -6 mol/(mlcat·MPa·s) E a=66 07kJ/mol The results indicate that the model fits well with experimental data The chain growth probability (α) shows a simple concern with temperature and H 2/CO ratio: α=1/(1+ρRHC)
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2000年第3期268-273,共6页
Journal of Fuel Chemistry and Technology
关键词
费托合成
铁锰催化剂
动力学
烃类液体燃料
surface carbide mechanism, chain growth probability, kinetics, activity energy, reaction rate
