变压吸附空分制氮过程的数值模拟

对变压吸附空分制氮过程，建立了相应的数学模型，并用正交配量，四阶龙格－库塔法和迭代法相结合求解了这－复杂的偏微分方程组，利用经过中试检验的模型，对各种操作条件（吸附压力，吸附时间，进料流速，吹扫流速等）下体系的性能进行了预测，预测结果对工业装置的设计和操作具有指导作用，模拟计算证明，所发展的算法计算迅速，稳定性好。

Numerical Simulation of PSA Process for Nitrogen Production from Air

The PSA cycling process for nitrogen production,based on the difference in adsorption kinetics of oxygen and nitrogen on a commercial carbon molecular sieve, is systematically studied. Some results of developing models and algorithms are reported in this paper. A linear driving force model (LDF) of mass transfer is introduced into the mathematical model of the cycling process and an iteration algorithm combined with an orthogonal collocation method for solving PDEs is developed. Computation shows the high efficiency and stability of the algorithm. With this model, the performance of a pilot plant packed with 15Kg of carbon molecular sieve, BF-CMS, is simulated and predicted under different operation conditions. This paper also discusses the effects of thermodynamic and kinetic parameters on the unit performance.