At the CO₂ regeneration stage in a CO₂ chemical absorption process, the stripping gas (i.e., H₂O(g)/CO₂) leaving the CO₂ desorber is cooled down to return the condensate into the desorber. Mostly the circulating cooling-water is used to provide this cooling duty. In this study, the air-cooling technology enhanced by transport membrane condensation was investigated with the aim of reducing the additional cooling-water duty of the chemical absorption process. A tubular hydrophilic ceramic membrane with the mean pore size of the inner separation layer of 4 nm and the length of 400 mm was used for water recovery from H₂O(g)/CO₂ using N₂ as the sweeping gas. Results showed that the cooling performance of the N₂-cooling ceramic membrane condenser is about 4–7 times higher than that of the N₂-cooling stainless steel condenser with the same dimensions. For the water recovery from H₂O(g)/CO₂ using the N₂-cooling ceramic membrane condenser, increasing the flow rate and pressure of inlet H₂O(g)/CO₂ can bring about the increase of the water transfer flux. The water transfer flux can increase with the H₂O(g) molar fraction in H₂O(g)/CO₂ as well. Additionally, the increase of N₂ flow rate in addition to the reduction of inlet N₂ pressure can enhance the water transfer performance. Moreover, the temperatures of H₂O(g)/CO₂ and N₂ have little impacts on the water transfer flux. Finally, an empirical correlation for predicting the water transfer flux as a function of the key operation variables was proposed for the N₂-cooling ceramic membrane condenser. Most of the calculated water transfer flux data are in good agreement with the experimental results with an average absolute deviation of 12.5%.

在CO ₂化学吸收过程中的CO ₂再生阶段，离开CO ₂解吸器的汽提气（即，H ₂ O（g）/ CO ₂）被冷却以使冷凝物返回解吸器。通常，循环冷却水用于提供这种冷却能力。在这项研究中，为了减少化学吸收过程中额外的冷却水负荷，研究了通过输送膜冷凝增强的空气冷却技术。使用内部分离层的平均孔径为4 nm，长度为400 mm的管状亲水性陶瓷膜从H ₂ O（g）/ CO _2中使用N回收水₂作为清扫气。结果表明，在相同尺寸下，N ₂冷却陶瓷膜冷凝器的冷却性能大约是N ₂冷却不锈钢冷凝器的4-7倍。对于使用N ₂冷却陶瓷膜冷凝器从H ₂ O（g）/ CO _2中回收水，增加进口H ₂ O（g）/ CO ₂的流量和压力可以增加水的转移。通量。在H ₂ O（g）/ CO _2中，水的传递通量也可以随H ₂ O（g）摩尔分数的增加而增加。另外，N ₂的增加流速除了降低进口N ₂压力外，还可以增强水的输送性能。而且，H ₂ O（g）/ CO ₂和N ₂的温度对水传递通量的影响很小。最后，针对N ₂冷却陶瓷膜冷凝器，提出了根据关键操作变量预测水流通量的经验相关性。计算出的大多数水转移通量数据与实验结果非常吻合，平均绝对偏差为12.5％。