Nonisothermal Adsorption Model for Molecular Sieve Oxygen Concentrator(MSOC)
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摘要: 介绍了机载分子筛产氧系统OBMSOGS(OnBoard Molecular Sieve Oxygen Generating system)的工作原理和变压吸附PSA(Pressure Swing Adsorption)的基本理论,建立了分子筛氧浓缩器MSOC(Molecular Sieve Oxygen Concentrator)的数学模型.模型考虑了筛床的传热传质、压力变化和吸附热引起的吸附等温梯度的变化等因素对吸附性能的影响.动力方程采用线性推动力方程,采用混合Langmuir吸附等温理论计算吸附量.用所建立的数学模型对MSOC的吸附过程进行了模拟并对结果进行了分析.Abstract: The operating principle of the OnBoard Oxygen Generating System (OBOGS) and the basic theory of enriching oxygen with Pressure Swing Adsorption (PSA) are briefly introduced. A nonisothermal adsorption model to simulate the dynamic PSA process has been established with consideration of the factors of mass transfer, heat transfer as well as pressure variation in the column. In the model, linear driving force for adsorption rate and mixed Langmuir isothermal theory for calculating equilibrium amount adsorbed are adopted. The adsorption process of adsorption bed is simulated and the result is analyzed.
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Key words:
- molecular sieves /
- adsorption /
- mathematical models /
- onboard oxygen generating system
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[1] Farooq S,Rathor M N,Hidajat K. A predictive model for a kinetically controlled pressure swing adsorption separation process[J]. Chemical Engineering Science,1993,48(24):4129~4141． [2]Kazuyuki Chihara,Motoyuki Suzuki. Simulation of nonisothermal pressure swing adsorption[J]. Journal of Chemical Engineering of Japan,1983,16(1):53~61． [3]Farooq S,Hassan M M,Ruthben D M. Heat effects in pressure swing adsorption systems[J]. Chemical Engineering Science,1988,43(5):1017~1031． [4]Douglas M Ruthven,Shamsuzzaman Farooq． Pressure swing adsorption[M]． New York:VCH Publishers Inc,1994． -
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