Abstract The absorption-desorption process for recovery of ethanol from exhaust gas was studied by simulation with AspenPlus. UNIFAC model and Wilson model were selected for predicting equilibrium relationship of absorption tower and desorption tower respectively, meanwhile, the process parameters were optimized. The optimal parameters of towers were proposed: the theoretical total plate number of absorption tower is 25, the liquid gas ratio is 0.24 L/m3, the mass fraction of ethanol from overhead exhaust gas is 28×10-6 which is operated under room temperature and atmospheric pressure, the recovery rate of ethanol is close to 1 at column bottom. The theoretical total plate number of desorption tower is 20, the reflux ratio is 3, the raw material is fed at 10th plate. A top product of acetone with 91.7% concentration could be obtained and a bottom product of almost pure water can be recycling applied as absorbent water after cooling. These results are useful for construction design and improvement.
NIAN Li-Jun 1, HAN Yue-Zhi 1, WANG Zhen 2, GAO Rui-Chang 2.Simulation and Optimization of Recycling Process for Exhaust Gas with Ethanol[J] Chemcial Industry and Engineering, 2013,V30(5): 61-64
2013, Vol. 30 
