Modeling and Optimization of Cyclic Adsorption Enrichment of Gas Mixtures with Hydrogen

Abstract

A mathematical model of the dynamics of pressure swing adsorption was developed. The adsorption, aimed at separating multicomponent gas mixtures for hydrogen concentration, is performed in a four-adsorber unit with a CaA zeolite adsorbent. An original description of the mass transfer of the adsorbate (H₂, CO₂, CO) from the gas phase to the solid adsorbent for the mixed-diffusion region depending on the gas flow rate in the adsorbent bed was proposed. A computational treatment of the effects of the raw materials load and control variables on the dynamics of the cyclic adsorption process of gas mixture enrichment with hydrogen was performed. The problem of adaptive optimization of process variables was formulated and studied by modeling.