摘要
In an ammonia-based post-combustion carbon capture (PCC) process, the regeneration energy of CO 2 -lean solvent comprises the main fraction of overall energy consumption. The use of a pressurized CO 2 stripper to enhance the CO 2 purity in the overhead vapor is one option for reducing the regeneration energy. Further energy reductions can be achieved by modifying stripper configurations reported in the literature. In this study, the energy-saving performance of advanced stripper configurations is investigated, including cold split bypass (CSB), lean vapor compression (LVC), and rich vapor compression (RVC). Our results show that the energy reduction by CSB has been underestimated in the literature because the effect of the warm rich feed stage has been neglected. Compared with a standard stripper operated at 10 atm, the CSB modification achieves 34.2% of energy reduction, and the combination of CSB and LVC reaches 34.4%. In other words, LVC only improves the energy saving of CSB by 0.2%.