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