Objective The aim is to develop a suitable organic amine solution for the removal of CO₂.

Methods The CO₂ absorption/desorption performance of piperazine-based organic amine solutions were investigated using PZ, 1MPZ, HEP and AEP as absorbers.

Results The CO₂ absorption performance of the PZ solution and AEP solution was superior than that of the 1MPZ solution and HEP solution obviously, but the desorption effeciency of the two solutions was relatively low, which was not beneficial to the circulation of organic amine solutions. Although the desorption effeciency of 1MPZ solution was more than 85.00%, its volatility led to a considerable reduction in the CO₂ circular absorption capacity, which limited industrial application. While the desorption effeciency of the HEP solution was about 90.00%, and the variation range of both CO₂ absorption capacity and desorption effeciency was lower than 1% after 4 cycles of the absorption/desorption experiments.

Conclusions The HEP solution has excellent stability, so it is more suitable for the industrial CO₂ capture process, and has a great application prospect.