Regeneration method | Advantages | Disadvantages | Utilization |
Temperature-Swing Adsorption (TSA) | 1) Applicable for strongly adsorbed species 2) High concentrations recovery for gases and liquids desorbate | 1) Thermal aging of adsorbents. 2) Thermal inefficiency due to Heat loss 3) Inefficient use of adsorbent if the cycle time is long 4) High latent heat for liquids 5) Low concentrations | Drying gases Drying solvents |
Pressure-Swing Adsorption (PSA) | Good for weakly adsorbed species required in high purity | 1) Very low pressure may be required 2) High concentrations | Drying of gases Hydrogen recovery Air separation |
Adsorbent Displacement | 1) Good for strongly held species 2) Avoids risk of cracking reactions during regeneration 3) Avoids thermal aging of adsorbent | Product separation and recovery needed | Separation of linear form branched and cyclic paraffins |
Inert Purging | Essentially at constant T and P | Only for weakly adsorbed species, purge flow is high not normally used when desorbate needs to be recovered | Relatively uncommon without TSA since purging alone is only suitable for weakly adsorbed species |