Carbon dioxide absorbent as well as preparation method and application thereof

• Main Authors: MENG RUIHONG, WANG RUI, XU DONG, ZHANG SHUAI, HAN TAO, DU SHUMING, FENG LEI, SHI XIAOHONG, FENG BAIYANG
• Format: Patent
• Language: Chinese; English
• Published: 07.07.2023
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention belongs to the technical field of mixed gas separation and purification, and particularly relates to a carbon dioxide absorbent and a preparation method and application thereof. The carbon dioxide absorbent contains a main agent, a first auxiliary agent and a second auxiliary agent, the main agent is a tertiary alcohol amine compound, the first auxiliary agent is diethylenetriamine, the second auxiliary agent is a cyclic polyamino organic amine compound, and the weight ratio of the main agent to the first auxiliary agent to the second auxiliary agent is (2-4): (1-2): 1. The carbon dioxide absorbent prepared by the method has a relatively high average absorption rate within the absorption time of 0-2000s, and meanwhile, the regeneration rate and the circulation capacity of the absorbent can be improved. 本发明属于混合气体分离和净化技术领域，具体涉及一种二氧化碳吸收剂及其制备方法与应用。该二氧化碳吸收剂含有主剂、第一辅助剂和第二辅助剂，所述主剂为叔醇胺类化合物，所述第一辅助剂为二乙烯三胺，所述第二辅助剂为环状多氨基有机胺类化合物，其中，所述主剂、第一辅助剂和第二辅助剂的重量比为2-4：1-2：1。本发明制备得到的二氧化碳吸收剂在吸收时间为0-2000s内，具有较高的平均吸收速率，同时可以提