A study of heatless adsorption in the model system CO2 in He, I

✍ Scribed by L.H. Shendalman; J.E. Mitchell

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 791 KB
• Volume: 27
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(72)85031-0

✦ Synopsis

Heatless adsorption, a cyclic gas adsorption process which employs pressure changes for bed regeneration, is experimentally investigated in the model system of CO, in excess He. Comparison is made with analytical results from a linear mathematical model of equilibrium adsorption of a trace component obtained by the method of characteristics. It is found that above a critical purge flow/feed flow ratio, the concentration of adsorbate in product decreases with each increasing half-cycle from an initially saturated bed, while below the critical ratio an asymptotic adsorbate concentration is reached in agreement with theory. The theory predicts an exponential diminution of CO2 concentration with time. It is observed that the concentration levels decrease monotonically but not this rapidly. The model does provide considerable physical insight into the workings of heatless adsorption as well as a bound for process operation.