⇄Switching schedules

AdsorptionRegenerationCoolingPre-adsorberHot purgeCold purge
3-tower, equal-pressure regeneration: 8 h adsorb / 8 h regen / 8 h cool
0–8 h8–16 h16–24 h
Tower AAdsorptionRegenerationCooling
Tower BCoolingAdsorptionRegeneration
Tower CRegenerationCoolingAdsorption
2+1 with pre-adsorber, equal-pressure regeneration: 8 h adsorb / 4 h regen / 4 h cool
0–4 h4–8 h8–12 h12–16 h
Tower AAdsorptionAdsorptionRegenerationCooling
Tower BRegenerationCoolingAdsorptionAdsorption
Pre-adsorberCold purge (adsorb)Hot purge (regen)Cold purge (adsorb)Hot purge (regen)
4-tower, equal-pressure regeneration: 8 h adsorb / 4 h regen / 4 h cool
0–4 h4–8 h8–12 h12–16 h
Tower AAdsorptionAdsorptionRegenerationCooling
Tower BCoolingAdsorptionAdsorptionRegeneration
Tower CRegenerationCoolingAdsorptionAdsorption
Tower DAdsorptionRegenerationCoolingAdsorption