浆态相FT合成反应过程中的气液相界面传质特性研究

Study of gas liquid film mass transfer in slurry phase F T synthesis

探讨了目前应用于浆态相ＦＴ过程气液界面传质研究的关联式和实验途径，以及气、液速、固载量等工艺条件对传质系数ｋＬ及相对阻力β的影响规律，认为Ｈ２和ＣＯ在一般反应条件下都可以不成为限速组份，二者对β的贡献也受反应器、气、液速、液体介质的影响；同时在优化催化剂ＲａｎｅｙＦｅ的三相反应基础上估算了ｋＬ和β值，结果表明，在此内表面利用率很高的骨架催化剂上，β值是可以忽略的，即气液界面传质阻力相对很小，在催化剂载量５％～１２％范围是动力学控制区域。

The relations and experimental methods have been reviewed, which are currently used for studying gas liquid film diffusion in the three phase reaction process. The effects of gas and liquid velocities, solid concentration (catalyst loading) or other process parameters are investigated on the mass transfer coefficient k L and its relative resistance β . The suggestion is that both hydrogen and carbon monoxide can be avoided from being rate limited reactants under general conditions, and their corresponding β values are influenced greatly by reactor type, gas and liquid velocities, and liquid medium. The k L and β are calculated for the optimum type of Raney Fe catalyst for slurry phase F T synthesis. The result indicates that the β of gas liquid film mass transfer of hydrogen and carbon monoxide may be negligible on this highly utilized inter area catalyst. That is to say that the mass transfer resistance is very low, being the kinetic control region in a catalyst loading range of 5%～12%.