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二乙二醇二甲醚对胺类少水吸收剂CO2捕集性能及分相机理影响的研究
Study on effect of diethylene glycol dimethyl ether on CO2 capture performance and phase separation mechanism of amine water-lean absorbent
- 低碳化学与化工 2025, 50(4): 131-139.
- 作者机构：
中国大唐集团科学技术研究总院有限公司华东电力试验研究院，安徽 合肥 230011
- 作者简介：
侯大伟（1990—），硕士，工程师，研究方向为CO2捕集和大气污染物治理，E-mail：houdawei17@163.com。
- 基金信息：中国大唐集团科学技术研究总院有限公司华东电力试验研究院研发项目(KY-2022-05)
DOI：10.12434/j.issn.2097-2547.20240343
中图分类号： TQ413收稿：2024-08-20，
修回：2024-10-13，
纸质出版：2025-04-25
- 稿件说明：
移动端阅览
侯大伟.二乙二醇二甲醚对胺类少水吸收剂CO2捕集性能及分相机理影响的研究[J].低碳化学与化工,2025,50(04):131-139.
HOU Dawei.Study on effect of diethylene glycol dimethyl ether on CO2 capture performance and phase separation mechanism of amine water-lean absorbent[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):131-139.
侯大伟.二乙二醇二甲醚对胺类少水吸收剂CO2捕集性能及分相机理影响的研究[J].低碳化学与化工,2025,50(04):131-139. DOI： 10.12434/j.issn.2097-2547.20240343.
HOU Dawei.Study on effect of diethylene glycol dimethyl ether on CO2 capture performance and phase separation mechanism of amine water-lean absorbent[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):131-139. DOI： 10.12434/j.issn.2097-2547.20240343.
摘要
化学吸收法是重要的CO
2
捕集技术，其中少水吸收剂因具有捕集速率较快、CO
2
吸收负荷较高和再生能耗较低等优点而被广泛研究。以1
3-丙二胺（DAP）/四甲基乙二胺（TMEDA）/H
2
O为基础的化学吸收剂具有良好的CO
2
捕集性能，而利用物理溶剂替换部分H
2
O所得胺类少水吸收剂可进一步降低再生能耗。在DAP/TEMEA/H
2
O中加入二乙二醇二甲醚（DMEDEG），制得胺类少水吸收剂DAP/TEMEA/DMEDEG/H
2
O。研究了
m
(DMEDEG):
m
(H
2
O)对DAP/TEMEA/DMEDEG/H
2
O CO
2
吸收、解吸性能的影响，采用核磁共振技术和量子化学计算分析了DAP/TMEDA/DMEDEG/H
2
O的反应和分相机理，并研究了DAP/TMEDA/DMEDEG/H
2
O的腐蚀性和再生能耗。结果表明，将DAP/TMEDA/DMEDEG/H
2
O中DAP + TMEDA质量分数固定为50%，当
m
(DMEDEG):
m
(H
2
O)为1:9时，DAP/TMEDA/DMEDEG/H
2
O具有最大CO
2
循环负荷（3.549 mol/kg）；DAP与CO
2
反应主要生成氨基甲酸酯（DAPCOO
-
），并且中间产物（DAP
+
COO
-
）更容易使TMEDA质子化；一定条件下腐蚀20#碳钢试片7 d，DAP/TMEDA/DMEDEG/H
2
O的缓蚀率为-1.035；相同条件下，DAP/TMEDA/DMEDEG/H
2
O的再生能耗（4.13 GJ/t左右）略低于质量分数为30%的单乙醇胺的再生能耗（4.20 GJ/t左右）。
Abstract
Chemical absorption is an important CO
2
capture technology
among which water-lean absorbent has been widely studied due to their advantages of fast capture rate
high CO
2
absorption capacity and low regeneration energy consumption
etc. Chemical absorbent based on 1
3-diaminopropane (DAP)/tetramethylethylenediamine (TMEDA)/H
2
O exhibits excellent CO
2
capture performance
while the amine water-lean absorbent prepared by replacing part of H
2
O with physical solvent can further reduce regeneration energy consumption. Amine water-lean absorbent DAP/TMEDA/DMEDEG/H
2
O was prepared by the addition of diethylene glycol dimethyl ether (DMEDEG) to DAP/TMEDA/H
2
O. Effect of
m
(DMEDEG):
m
(H
2
O) on the CO
2
absorption and desorption performance of DAP/TMEDA/DMEDEG/H
2
O was investigated. Nuclear magnetic resonance (NMR) and quantum chemical calculation were used to analyze the reaction and phase-separation mechanisms of DAP/TMEDA/DMEDEG/H
2
O. Additionally
the corrosiveness and regeneration energy consumption of DAP/TMEDA/DMEDEG/H
2
O were studied. The results show that
by fixing the DAP + TMEDA mass fraction in DAP/TMEDA/DMEDEG/H
2
O at 50%
DAP/TMEDA/DMEDEG/H
2
O exhibits the maximum CO
2
cyclic load (3.549 mol/kg) with
m
(DMEDEG):
m
(H
2
O) of 1:9. The reaction between DAP and CO
2
mainly produces carbamate (DAPCOO
-
)
and the intermediate product (DAP
+
COO
-
) facilitates the protonation of TMEDA. After 7 d of corrosion of 20# carbon steel sample under certain conditions
the corrosion rate of DAP/TMEDA/DMEDEG/H
2
O is -1.035. Under certain conditions
the regeneration energy consumption of DAP/TMEDA/DMEDEG/H
2
O (approximately 4.13 GJ/t) is slightly lower than the regeneration energy consumption (approximately 4.20 GJ/t) of monoethanolamine with mass fraction of 30%.
关键词
Keywords
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