异辛胺与N,N-二甲基甲酰胺复配无水吸收剂的CO2吸收与解吸实验研究
何彦 , 田英林 , 杜庶铭 , 王乐萌 , 付东 , 张盼
现代化工 ›› 2025, Vol. 45 ›› Issue (S1) : 331 -337.
异辛胺与N,N-二甲基甲酰胺复配无水吸收剂的CO2吸收与解吸实验研究
Experimental study on absorption and desorption of CO2 by anhydrous absorbent composed of 2-ethylhexy-1-amine and N,N-dimethylformamide
选取异辛胺(EHA)与N,N-二甲基甲酰胺(DMF)的组合作为新型无水吸收剂,探讨了其在捕集模拟烟气中CO2时的吸收与解吸性能变化,并分析了其循环性能和反应机理。结果表明,EHA-DMF无水吸收剂在高浓度下具有更高的吸收容量和解吸速率,且在循环使用中表现出良好的稳定性。反应机理分析显示,EHA吸收CO2生成氨基甲酸酯,而DMF作为助剂促进了CO2的快速传递。此外,湿壁塔实验表明,CO2吸收速率受CO2负载增加和烟气流量减少而下降。综合上述分析,该复配吸收剂在工业应用领域展现出显著的应用潜力和广阔的发展前景。
The combination of 2-ethylhexy-1-amine (EHA) and N,N-dimethylformamide (DMF) is selected as a new type of water-lean absorbent,and its performance changes in absorption and desorption of CO2 from simulated flue gas are explored.The cycle performance and reaction mechanism are also analyzed.Results show that the EHA-DMF anhydrous absorbent has higher absorption capacity and desorption rate at high concentration,and shows a good stability in recycling.It is indicated from reaction mechanism analysis that EHA absorbs CO2 to generate methylcarbamate,while DMF as an additive promotes the rapid transfer of CO2.In addition,the wetted-wall column experiment suggests that the absorption rate of CO2 decreases with the increase of CO2 loading amount and the decrease of flue gas flow rate.In a sum,this EHA-DMF compound absorbent demonstrates significant application potential and broad development prospects in the industrial application field.
碳捕集 / N,N-二甲基甲酰胺 / 异辛胺 / 吸收-解吸性能 / 无水吸收剂
CO2 capture / N,N-dimethylformamide / 2-ethyl-1-hexylamine / absorption-desorption performance / anhydrous absorbent
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国家自然科学基金青年项目(52106009)
河北省自然科学基金面上项目(E2021502024)
中央高校基本科研业务费专项资金(2024MS170)
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