Pressure swing adsorption description

A cell model is presented for the description of the separation of two-component gas mixtures by pressure swing adsorption processes. Local equilibrium is assumed with linear, independent isotherms. The model is used to determine the light gas enrichment and recovery performance of a single-column recovery process and a two-column recovery and purification process. The results are discussed in general terms and with reference to the separation of helium and methane. 

Description The generic flowsheet consists of feed pre-treatment, prereforming (optional), steam-HC reforming, shift conversion and hydrogen purification by pressure swing adsorption (PSA). However, it is often tailored to satisfy specific requirements. 

Description Oxygen can be used from air separation plant, as well as, from the cost-effective pressure swing adsorption (PSA) process. The Vinnolit oxychlorination process is also able to handle ethylene and/or anhydrous hydrogen chloride containing vent streams from direct chlorination, acetaldehyde, monochloro acetic acid and other processes. 

This book comprises 12 chapters covering an introduction, porous adsorbents, adsorption equilibrium, diffusion in porous particles, kinetics of adsorption in a vessel, kinetics of adsorption in a column (chromatographic analysis and breakthrough curves), heat effects, regeneration of spent adsorbent, chromatographic separation, pressure swing adsorption and adsorption for energy transport. The text comprises a blend of mathematical analysis and descriptions of plant and processes. Each chapter is fully referenced. 

A mathematical description of a pressure swing system has been presented by Shendalman and Mitchell153 who assumed that isothermal equilibrium adsorption takes place and that the isotherm is linear, with the feed consisting of a single adsorbate at low concentration in a non-adsorbed carrier gas. 

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