Abstract: The pressure swing adsorption (PSA) models discussed here are divided into three
categories: partialdifferential equation model, electrical analogue model and neural
network model. The partial differential equationmodel, including equilibrium and kinetic
models, has provided an elementary viewpoint for PSA processes. Usingthe simplest
equilibrium models, some influential factors, such as pressurization with product,
incomplete purge,beds with dead volume and heat effects, are discussed respectively. With
several approximate assumptions i.e.,concentration profile in adsorbent, "frozen" column,
symmetry and heat effects of bed wall, the more complexkinetic models can be simplified to
a certain degree at the expense of a limited application. It has also been foundthat the
electrical analogue model has great flexibility to handle more realistic PSA processes
without any additionalhypothesis.

Key words: gas separation, pressure swing adsorption, mathematical model

摘要： The pressure swing adsorption (PSA) models discussed here are divided into three
categories: partialdifferential equation model, electrical analogue model and neural
network model. The partial differential equationmodel, including equilibrium and kinetic
models, has provided an elementary viewpoint for PSA processes. Usingthe simplest
equilibrium models, some influential factors, such as pressurization with product,
incomplete purge,beds with dead volume and heat effects, are discussed respectively. With
several approximate assumptions i.e.,concentration profile in adsorbent, "frozen" column,
symmetry and heat effects of bed wall, the more complexkinetic models can be simplified to
a certain degree at the expense of a limited application. It has also been foundthat the
electrical analogue model has great flexibility to handle more realistic PSA processes
without any additionalhypothesis.

关键词: gas separation;pressure swing adsorption;mathematical model