Abstract: A novel and energy saving flowsheet is proposed in which a side draw line was added in the absorber. The bottom stream of the absorber flows into the stabilization column, and the liquid stream from the side line at the lower part of the tower enters the flash tank through cooling. The comparison of new flowsheet and conventional “four tower process” are made in view of energy efficiency. The study shows that the reboiling duty, cooling duty in front of the flash tank and energy consumption are reduced by 12.2%, 10.4% and 5.2%, respectively, compared with the conventional flowsheet.