Selection of Blended Solvents for CO2 Absorption from Coal-Fired Flue Gas. Part 1: Monoethanolamine (MEA)-Based Solvents

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• 作者：Dechen Zhu ; Mengxiang Fang ; Zhong Lv ; Zhen Wang ; Zhongyang Luo
• 刊名：Energy & Fuels
• 出版年：2012
• 出版时间：January 19, 2012
• 年：2012
• 卷：26
• 期：1
• 页码：147-153
• 全文大小：888K
• 年卷期：v.26,no.1(January 19, 2012)
• ISSN：1520-5029

文摘

Solvent selection is the potential breakthrough for the chemical absorption method to capture CO₂ from coal-fired flue gas. A total of 16 kinds of selected monoethanolamine (MEA)-based solvents were assessed by absorption at 40 掳C up to 12 kPa CO₂ partial pressure and desorption at 100 掳C down to 1.0 kPa CO₂ partial pressure. Results showed that the 20% MEA + 10% diethylenetriamine (DETA) system maintains the highest average absorption rates and reaches the highest loading of 0.556 kg of CO₂/kg of solute during all of the tested systems. The absorption capacity of the 20% MEA + 10% DETA system is increased to 53%, and the corresponding average removal efficiency is enhanced more than 31% compared to 30% MEA solution. Furthermore, there is only a slight difference between the regeneration performance of the 20% MEA + 10% DETA system and that of the 30% MEA solution.