Study on amino acid salt aqueous solid-liquid phase change absorbent for energy-efficient CO<sub>2</sub> capture

GU Yongzheng; LI Xiaohui; GAO Ge; LI Xiaoshan; XIONG Zhuo

doi:10.12434/j.issn.2097-2547.20240348

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Study on amino acid salt aqueous solid-liquid phase change absorbent for energy-efficient CO₂ capture

更新时间：2025-04-27

- Study on amino acid salt aqueous solid-liquid phase change absorbent for energy-efficient CO₂ capture
- Vol. 50, Issue 4, Pages: 122-130(2025)
- 作者机构：
  
  1.国电电力发展股份有限公司，北京 100101
  2.国能三河发电有限责任公司，河北廊坊 065201
  3.华中科技大学能源与动力工程学院煤燃烧与低碳利用全国重点实验室，湖北武汉 430074
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240348
  CLC： TQ028
- Received：23 August 2024，
  
  Revised：2024-10-12，
  
  Published：25 April 2025
- 稿件说明：
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顾永正,李晓辉,高歌等.高效低能耗氨基酸盐水溶液固-液相变吸收剂捕集CO₂性能探究[J].低碳化学与化工,2025,50(04):122-130.

GU Yongzheng,LI Xiaohui,GAO Ge,et al.Study on amino acid salt aqueous solid-liquid phase change absorbent for energy-efficient CO₂ capture[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):122-130.
顾永正,李晓辉,高歌等.高效低能耗氨基酸盐水溶液固-液相变吸收剂捕集CO₂性能探究[J].低碳化学与化工,2025,50(04):122-130. DOI： 10.12434/j.issn.2097-2547.20240348.

GU Yongzheng,LI Xiaohui,GAO Ge,et al.Study on amino acid salt aqueous solid-liquid phase change absorbent for energy-efficient CO₂ capture[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):122-130. DOI： 10.12434/j.issn.2097-2547.20240348.

摘要

利用传统有机胺水溶液捕集CO

的再生能耗较高，制约了其在CO

捕集领域的广泛应用。为降低吸收

剂的再生能耗，提出了一种高效低能耗氨基酸盐水溶液固-液相变吸收剂。制备了不同浓度的L-苏氨酸钾溶液（PL-T）作为固-液相变吸收剂，研究了其CO

吸收、解吸过程，并对吸收、解吸速率，以及反应热、显热等进行了评价。结果表明，在吸收、解吸温度分别为313 K、363 K下，当PL-T浓度为4 mol/L时，吸收、解吸速率均达到最大值，分别为2.20 × 10

-5

mol/s、1.43 × 10

-4

mol/s。在313 K下，5 mol/L PL-T与CO

的反应热为-80.94 kJ/mol，其绝对值小于5 mol/L单乙醇胺溶液对应值（-88.22 kJ/mol），因此解吸能耗更低；当只解吸5 mol/L PL-T的固相沉淀物时，其显热可较5 mol/L MEA降低51.4%。

Abstract

High regeneration energy consumption for CO

capture by traditional aqueous amine solution is still one of the bottlenecks restricting its wide application in CO

capture field. In order to reduce the regenerative energy consumption of the absorbent

an energy-efficient amino acid solution solid-liquid phase change absorbent was proposed. Potassium L-threonine solutions (PL-T) with different concentrations were prepared as the solid-liquid phase change absorbent. The CO

absorption and desorption processes of PL-T were investigated

and the absorption and desorption rates

reaction heat and sensible heat were evaluated. The results show that under absorption and desorption temperatures of 313K and 363 K

respectively

the absorption and desorption rates both reach the maximum values with PL-T concentration of 4 mol/L

which are 2.20 × 10

-5

mol/s and 1.43 × 10

-4

mol/s

respectively. Under 313 K

the reaction heat of 5 mol/L PL-T with CO

is -80.94 kJ/mol

and its absolute value is less than the corresponding value (-88.22 kJ/mol) of 5 mol/L monoethanolamine solution

leading to a lower desorption energy consumption. When only solid precipitate of 5 mol/L PL-T is desorbed

its sensible heat can be reduced by 51.4%

compared to 5 mol/L MEA.

关键词

Keywords

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Study on amino acid salt aqueous solid-liquid phase change absorbent for energy-efficient CO2 capture

DOI：10.12434/j.issn.2097-2547.20240348

摘要

Abstract

关键词

Keywords

references

Study on amino acid salt aqueous solid-liquid phase change absorbent for energy-efficient CO₂ capture