Carbon dioxide absorbent as well as preparation method and application thereof

• Main Authors: MENG RUIHONG, WANG TAO, ZHANG SHUAI, HAN TAO, LUO ZHONGYANG, CEN KEFA, GAO XIANG, XU DONG, FENG LEI, SHI XIAOHONG, FANG MENGXIANG, FENG BAIYANG, CHANG LIN
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• 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, an auxiliary agent and an active agent, the main agent is steric hindrance amine containing one N atom, the auxiliary agent is a primary amine compound, the active agent is cyclic polyamino organic amine, and the weight ratio of the main agent to the auxiliary agent is (1.5-3): 1. The carbon dioxide absorbent prepared by the invention has a relatively high absorption rate when absorbing and capturing carbon dioxide, and meanwhile, the regeneration rate and the circulation capacity 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、辅助剂和活性剂，所述主剂为含有一个N原子的空间位阻胺，所述辅助剂为一级胺类化合物，所述活性剂为环状多氨基有机胺，所述主剂与辅助剂的重量比为1.5-3：1。本发明制备得到的二氧化碳吸收剂在对二氧化碳进行吸收捕集时具有较高的吸收速率，同时可以提高再生速率和循环容量。