零长柱法测定分子筛吸附平衡等温线 的理论及仿真

王慧丹; 林贵平; 孙兵

零长柱法测定分子筛吸附平衡等温线的理论及仿真

北京航空航天大学航空科学与工程学院,北京 100191

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出版历程
- 收稿日期: 2010-11-04
- 修回日期: 2011-01-09
- 刊出日期: 2011-04-28

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

School of Aeronautics Science and Engineering, Beijing University of Aeronautics and Astronautics,Beijing 100191,China

摘要

摘要: 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,对两种利用实验测得的出口气体浓度进行流量计算的方法进行了分析,并根据仿真模型通过编程计算对两种不同的ZLC出口气体流量修正方法进行了对比,探讨了影响ZLC方法正确性的因素,并对ZLC方法的适用范围及两种修正方法的精确性进行了比较和分析,为ZLC方法的应用提供了依据.
- 零长柱法 /
- 分子筛 /
- 吸附 /
- 平衡等温线 /
- 模型仿真
Abstract: 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.
- zero length column method /
- molecular sieve /
- adsorption /

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参考文献(25)

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