A non-equilibrium model for fixed-bed multi-component adiabatic adsorption

✍ Scribed by Jeff H. Harwell; Athanasios I. Liapis; R. Litchfield; Daniel T. Hanson

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 862 KB
• Volume: 35
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(80)87006-0

✦ Synopsis

A mathematical model for adlabatlc adsorptlon of multiple components onto a fixed bed of adsorbent IS developed The model consrsts of a set of coupled, hyperbohc, partlal-dlfferen~~al equations Heat and mass transfer reststances evtdent m real systems are Included m the model Solutions of the equations are obtamed by numerical apphcatlon of the method of characterlsttcs Results show non-Ideal mass and thermal wavefronts and complex wave-wave InteractIons m adlabattc adsorptlon of benzene and cyclohexane onto activated carbon Phenomena of mversions m relative adsorptlvity due to temperature changes are also shown Column performance IS Indicated to be greatly affected by these phenomena Cases considered demonstrate that time on stream before breakthrough may be doubted by mcreasmg mfluent and mltlal bed temperatures It IS shown, m contrast to results obtamed fron using the non-equilibrium model, that models based on assumptions of local equdlbnum cannot quantitatively descnbe behavior of a typical mdustnal adsorptlon system