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Study on effect of diethylene glycol dimethyl ether on CO2 capture performance and phase separation mechanism of amine water-lean absorbent
- Low-Carbon Chemistry and Chemical Engineering Vol. 50, Issue 4, Pages: 131-139(2025)
- 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：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20240343
CLC： TQ413Received：20 August 2024，
Revised：2024-10-13，
Published：25 April 2025
- 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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