零长柱法测定分子筛吸附平衡等温线的理论及仿真

介绍了零长柱(zero length column,简称ZLC)法测定分子筛材料平衡等温线的基本原理,建立了ZLC系统的数学模型,并对ZLC系统进行了仿真,通过对比仿真和实验结果,验证了仿真模型的正确性.由于ZLC法测定平衡等温线,需同时知道吸附柱出口气体浓度和流量,而据以前的研究,两者相互耦合.因此,对两种利用实验测...

Theory and simulation for measurement of molecular sieve adsorption equilibrium isotherm by zero length column (ZLC) method

The theory for measurement of adsorption equilibrium isotherm by zero length column (ZLC) method was introduced,and a set of mathematical models on ZLC were built.Then,a program was developed based on the equations and simulations were carried out.A good agreement between the simulation results and the experimental data validated the program and models.For the measurement of equilibrium isotherms with the ZLC method,simultaneous measurement of the outlet concentration and flow rate was required,and both of which were coupled by previous investigations.Then,two ways of estimating the true column outlet carrier flow rate were analyzed.With these two estimations,the isotherms were calculated,and compared with the curves from simulation and theoretical calculation.Finally,influential factors to the accuracy and the applicable scope of the ZLC method were discussed,and the accuracy of two revised methods was analyzed,serving as the basis for applying the ZLC method.