Abstract: This paper introduced a simulated process consisting of mass transfer intensified and energy-saving absorption-stabilization system, which involves a feed preheater for desorption tower, two-stage condenser, and intermediate reboiler. The comparison of the simulated process with a basic process which only consists of a two stage-condenser and intermediate reboiler was conducted. It is found that the temperature of the first-stage condensed liquid phase entering the desorption tower is increased by feed preheater, and the duty of the first-stage condenser is decreased due to the direct mixing of desorbed gas with the gas from the first stage condenser instead of mixing of the desorbed gas with the bottom oil of the absorption tower and the compressed rich gas. Moreover, the mass transfer efficiency of desorption tower is improved and the overall utility consumption is reduced. Compared with the reference process, the energy consumption of the new process is reduced by 22.02%. Gas and liquid loads in the desorption tower are both reduced. The new process has advantages of mass transfer intensification, energy saving and low-loads of gas-liquid phase in the desorption tower.

Key words: absorption-stabilization system, mass transfer intensification, energy saving