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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
- Low-Carbon Chemistry and Chemical Engineering 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： TQ028Received：23 August 2024，
Revised：12 October 2024，
Published：25 April 2025
- 稿件说明：
移动端阅览
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
2
的再生能耗较高，制约了其在CO
2
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
2
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
2
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
2
capture by traditional aqueous amine solution is still one of the bottlenecks restricting its wide application in CO
2
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
2
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
2
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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