Abstract

Absorption by aqueous solutions of alkanolamines is the most mature technology for removing carbon dioxide (СО₂) from natural gas, off-gases from power engineering, and other mixtures. The possible presence of oxygen in the gas mixture being treated or air leakage into the absorption treatment system leads to oxidative degradation of the amine and deactivation of the absorption liquid with the formation of a wide range of corrosion-active degradation products. The paper discusses modern views on the effect of dissolved oxygen on the degradation of amine solvents. The main methods for preventing oxidative degradation of alkanolamines and fighting against it are described. Direct removal of oxygen (deoxygenation) from absorption liquids in compact and modular membrane gas–liquid contactors is suggested as an alternative countermeasure. The retrospective and state-of-the-art of membrane deoxygenation of aqueous media are presented. Advanced studies in the field of oxygen removal from amine СО₂ solvents used for flue gas treatment are described.

中文翻译：

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链烷醇胺 CO2 溶剂的膜脱氧防止其降解的前景（小评）

摘要

烷醇胺水溶液吸收是去除二氧化碳最成熟的技术（_СО2) 来自天然气、电力工程的废气和其他混合物。被处理的气体混合物中可能存在氧气或空气泄漏到吸收处理系统中，导致胺的氧化降解和吸收液的失活，形成范围广泛的腐蚀活性降解产物。本文讨论了关于溶解氧对胺类溶剂降解影响的现代观点。描述了防止链烷醇胺氧化降解和对抗它的主要方法。建议在紧凑和模块化的膜气液接触器中从吸收液中直接去除氧气（脱氧）作为替代对策。介绍了水介质膜脱氧的回顾性和最新技术。_描述了2种用于烟气处理的溶剂。