CO2 Solubility in Physicochemical Absorbent: Dibutyl Ether/N-Methylethanolamine/Ethanol
CO2 Solubility in Physicochemical Absorbent: Dibutyl Ether/N-Methylethanolamine/Ethanol
复制标题
CO2 在理化吸收剂中的溶解度：二丁醚/N-甲基乙醇胺/乙醇
DOI：
10.1007/s10765-019-2506-4
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发表时间：
2019-04-01
影响因子：
2.2
通讯作者：
Li, Yun
中科院分区：
文献类型：
--
作者：
Huang, Weijia;Du, Xiaojie;Li, Yun
本文提出了一种物理化学吸收剂用于CO2的捕集，它是由正乙醚作为物理溶剂，N-甲基乙醇胺（NMEA）作为化学添加剂，乙醇作为溶剂组成。采用等温合成装置测定了该吸收剂体系的汽液平衡行为。测量了313.15K下CO2在乙醇中的溶解度数据，并与文献数据进行了比较，验证了该方法的有效性。然后，在298.15K下，分别测量了上述体系在NMEA质量分数为15%、25%和50%时的CO2溶解度数据。结果表明，随着NMEA质量分数的增加，CO2的溶解度增加。在298.15 ~ 328.15K（间隔10 K）和0 ~ 3 MPa的压力范围内，测定了NMEA质量分数为25%的吸收剂中CO2的溶解度数据。结果表明，在相同的温度和压力条件下，CO2在物理化学吸收剂中的溶解度比在乙醚中的溶解度大。
In this work, a physicochemical absorbent was proposed for CO2 capture, which consists of dibutyl ether as physical solvent, N-methylethanolamine (NMEA) as chemical additive, and ethanol as dissolvent. The vapor-liquid equilibrium behavior of this CO2+physicochemical absorbent system was measured using an isothermal synthetic apparatus. The solubility data of CO2 in ethanol at 313.15K were measured and compared with literature data to verify the validity of this method. Then, the CO2 solubility data of above system with varying NMEA mass fractions of 15%, 25%, and 50% were, respectively, measured at 298.15K. It shows that the CO2 solubility increases when NMEA mass fraction goes up. The CO2 solubility data in the absorbent with 25% NMEA mass fraction were measured at a temperature range from 298.15K to 328.15K with the interval of 10K and at a pressure range from 0MPa to 3MPa. The result shows that CO2 turns out to be more soluble in the physicochemical absorbents than in dibutyl ether at the same conditions of temperature and pressure.