Carbon dioxide absorbent comprising ionic liquid and alcohol solvent, and method for separating carbon dioxide using same

• Main Authors: PIAN RENYU, JUNG IL-GU, JEONG JI SU, LEE JUNG-A, MIN SUNG HA-NA
• Format: Patent
• Language: Chinese; English
• Published: 29.08.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a carbon dioxide absorbent comprising an ionic liquid containing an imidazolyl anion and an aliphatic alcohol, the alcohol solvent contained in the carbon dioxide absorbent according to one embodiment having low toxicity and a very high boiling point, therefore, there is no problem of release into the atmosphere and environmental pollution caused thereby, and chemical stability is achieved, so that the possibility of release of decomposition products into the atmosphere can be significantly reduced. Further, it is possible to absorb carbon dioxide of a higher equivalent than the added equivalent of the absorbent, and to easily desorb the carbon dioxide due to low regeneration energy, thus being effective. 本发明涉及一种二氧化碳吸收剂，所述二氧化碳吸收剂包含含有咪唑基阴离子的离子液体以及脂肪族醇，根据一个实施方案的二氧化碳吸收剂中包含的醇溶剂具有低毒性和非常高的沸点，因此不存在释放到大气中和由此造成的环境污染的问题，并且具有化学稳定性，从而可以显著降低分解产物释放到大气中的可能性。此外，可以吸收比吸收剂的加入当量更高的当量的二氧化碳，并且由于再生能量低而容易解吸二氧化碳，因此有效。