Process for desorbing gas absorbed in an absorption liquid, the process comprising passing heated absorption liquid through a second channel of said desorption unit in counter-current flow with said absorption liquid in said first channel, while said absorption liquid in said first and second channel exchange heat through a corrugated plate separating at least a part of said first and second channel.
Gas desorption unit, comprising an assembly of plates, wherein the plates comprise a corrugated part comprising ridges and valleys, and a first channel there between, adapted for counter-current flow of said gaseous and liquid stream in said first channel, and a said second channel for a liquid stream in counter-current flow with the liquid stream in the first channel.