吸附反应器动态特性的研究  

DYNAMICS OF ABSORPTIVE REACTORS

作　　者：王涛[1] 李成岳[1] 

机构地区：[1]北京化工学院化工系,北京100029

出　　处：《化工学报》1992年第6期645-651,共7页CIESC Journal

摘　　要：针对反应速率方程为γ_A=k_1c_A^m-k_2c_B^n的非瞬时可逆均相反应A(?)vB、液相反应或浓度很稀的气相反应和反应物A或产物B瞬时非线性Langmuir吸附的情况,研究了反应和吸附相结合的吸附反应器之动态特性.建立了平推流固定床吸附反应器的动态模型,通过数值解法获得了反应物阶跃和方波输入时,吸附反应器出口的动态响应曲线.研究结果表明,吸附反应器无需附加净化步骤就能获得高纯度的产物;吸附反应物时,反应转化率降低,吸附产物时,反应转化率提高.并讨论了吸附平衡常数和反应速率常数对吸附反应器性能的影响.There is an increasing interest in the adsorptive reactors, in which adsorption is coupled with reaction. The dynamics of adsorptive reactors is of practical and theoretical significance. But only the cases of irreversible reactions and instantaneous reversible reactions coupled with adsorption were dealt with in previous studies. In this paper, a theoretical study for the dynamics of adsorptive reactors is presented. The reversible reaction, A vB with finite m-th order forward and n-th order backward reaction rate, coupled with the instantaneous nonlinear Langmuir adsorption of reactant alone or product alone is considered. A model of fixed bed adsorber/reactors is suggested on the assumption of no diffusional limitation, plug flow for the fluid phase, negligible pressure drop along the bed. The responses of fixed bed adsorber/reactors to step or pulse inputs of reactant A are obtained by numerical solution. The effects on the performance of adsorber/reactors of the factors, which are adsorption equilibrium constants, reaction rate constants, are discussed. The reactant-free effluents and higher reaction conversion are observed as a result of the coupling of adsorption and reaction, which enables the production of a product without the need of a purification step.

关 键 词：吸附反应器 动态特性 平推流模型 

分 类 号：TQ052[化学工程]