化工学报 ›› 2012, Vol. 63 ›› Issue (10): 3152-3157.DOI: 10.3969/j.issn.0438-1157.2012.10.021

• 分离工程 • 上一篇    下一篇

1-氨丙基-3-甲基咪唑溴功能型离子液体对CO2的吸收性能

阳涛, 毕崟, 郭开华   

  1. 中山大学工学院, 广东 广州 510006
  • 收稿日期:2012-02-15 修回日期:2012-07-24 出版日期:2012-10-05 发布日期:2012-10-05
  • 通讯作者: 郭开华
  • 作者简介:郭开华,阳涛(1985- ),男,硕士研究生。
  • 基金资助:

    国家自然科学基金项目(51076169);广东省教育厅液化天然气及低温技术重点实验室项目(39000-3211101)。

Carbon dioxide absorption in 1-aminopropyl-3-methylimidazolium bromide aqueous solutions

YANG Tao, BI Yin, GUO Kaihua   

  1. School of Engineering, Sun Yat-Sen University, Guangzhou 510006, Guangdong, China
  • Received:2012-02-15 Revised:2012-07-24 Online:2012-10-05 Published:2012-10-05
  • Supported by:

    supported by the National Natural Science Foundation of China(51076169).

摘要: 1-氨丙基-3-甲基咪唑溴盐([APMIm])对CO2等酸性气体具有较强的选择性吸收性能,在能源及环保领域有较好应用前景。运用等容饱和吸收法在高压不锈钢反应釜中测得CO2在3种不同含水量的1-氨丙基-3-甲基咪唑溴盐水溶液中的溶解度数据,实验的温度范围为278.15~348.15 K,实验压力由低于大气压到最高6.5 MPa。实验结果表明,当水的质量分数达到60.84%以上,离子液体水溶液吸收CO2的能力和速率才会得到显著提升。尤其值得注意的是,在278.15 K、120 kPa达到吸收平衡时,CO2在含水质量分数为60.84%的1-氨丙基-3-甲基咪唑溴盐水溶液中的溶解度达到0.459 mol CO2 ·(mol IL)-1,接近理论最大吸收值0.5 mol CO2·(mol IL)-1。在较高压力下(3.9 MPa)最大CO2吸收量为1.894 mol CO2·(mol IL)-1

关键词: 二氧化碳, 溶解度, 离子液体, 1-氨丙基-3-甲基咪唑溴盐

Abstract: Experiments for the solubility and phase equilibrium of carbon dioxide in aqueous solution of 1-aminopropyl-3-methylimidazolium bromide([APMIm])with three water concentrations(16.04%,31.59% and 60.84%,mass fraction),at 278.15—348.15 K and pressure up to 6.5 MPa were performed by using a high-pressure reaction cell based on an isochoric saturation technique.The results indicated that water concentration could greatly enhance the absorption capacity and increase the absorption rate of carbon dioxide in[APMIm] aqueous solution.For the 60.84% aqueous IL solution at 5℃ and 120 kPa,CO2 solubility was up to 0.459 mol CO2·(mol IL)-1,close to the theoretical maximum absorption capacity of 0.5 mol CO2·(mol IL)-1.Under a higher pressure(3.9 MPa),maximum CO2 absorption was 1.894 mol CO2·(mol IL)-1.

Key words: carbon dioxide, solubility, ionic liquid, [APMIm]

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