低碳化学与化工2025，Vol.50Issue(4)：122-130,9.DOI:10.12434/j.issn.2097-2547.20240348
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
Study on amino acid salt aqueous solid-liquid phase change absorbent for energy-efficient CO2 capture
摘要
Abstract
High regeneration energy consumption for CO2 capture by traditional aqueous amine solution is still one of the bottlenecks restricting its wide application in CO2 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 CO2 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 CO2 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
CO2捕集/固-液相变吸收剂/氨基酸盐/再生能耗/反应热/显热Key words
CO2 capture/solid-liquid phase change absorbent/amino acid salt/regeneration energy/absorption heat/sensible heat分类
化学工程引用本文复制引用
顾永正,李晓辉,高歌,李小姗,熊卓..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(4):122-130,9.基金项目
国家重点研发计划(0270120160) （0270120160）
河北省重点研发计划(22373708D). （22373708D）
