...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy & environmental science >The polarity effect upon the methane solubility in ionic liquids: a contribution for the design of ionic liquids for enhanced CO_2/CH_4 and H_2S/CH_4 selectivities
【24h】

The polarity effect upon the methane solubility in ionic liquids: a contribution for the design of ionic liquids for enhanced CO_2/CH_4 and H_2S/CH_4 selectivities

机译：极性对离子液体中甲烷溶解度的影响：有助于提高CO_2 / CH_4和H_2S / CH_4选择性的离子液体的设计

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Aiming at designing ionic liquids for the purification of natural gas, the solubility of methane in ionic liquids is investigated here through the measurement of the solubilities of methane in four ionic liquids (ILs), in a wide range of molar fractions, temperature and pressures. With the exception of the phosphonium-based IL, which behaves as an almost ideal solution, the other ionic liquids show strong positive deviations from ideality, resulting from non-favorable interactions between CH_4 and the ILs. The results indicate that the non-ideality of the solution increases, and the solubility decreases, with the polarity of the ionic liquid. The effect of the ionic liquid polarity on the CO_2/CH_4 and H2S/CH4 selectivities is evaluated here. The ionic liquids studied here present the largest CO_2/CH_4 and H_2S/CH_4 selectivities ever reported. The selectivity models previously proposed in the literature are tested against these new experimental data and are shown to fail. Furthermore, it is shown that describing the ILs' polarity using the Kamlet-Taft parameters, the CO_2/CH_4 and H_2S/CH_4 selectivities correlate well with the β-parameter providing a key to the design of ionic liquids with enhanced selectivities.
机译：为了设计用于净化天然气的离子液体，这里通过测量甲烷在四种离子液体（ILs）中的溶解度（在各种摩尔分数，温度和压力范围内）来研究甲烷在离子液体中的溶解度。除了基于IL的离子液体（其表现为几乎理想的溶液）以外，其他离子液体均由于CH_4与离子液体之间的不利相互作用而导致与理想离子的强烈正偏差。结果表明，随着离子液体的极性，溶液的非理想性增加，溶解度降低。在此评估了离子液体极性对CO_2 / CH_4和H2S / CH4选择性的影响。在此研究的离子液体呈现出有史以来最大的CO_2 / CH_4和H_2S / CH_4选择性。针对这些新的实验数据对先前在文献中提出的选择性模型进行了测试，结果表明该模型无效。此外，表明使用Kamlet-Taft参数描述IL的极性，CO_2 / CH_4和H_2S / CH_4的选择性与β参数密切相关，这为设计具有增强选择性的离子液体提供了关键。

著录项

  • 来源
    《Energy & environmental science》 |2011年第11期|p.4614-4619|共6页
  • 作者

    Pedro J. Carvalho; Joao A. P. Coutinho;

  • 作者单位

    Departamento de Quimica, CICECO, Universidade de Aveiro, 3810-193 Aveiro, Portugal;

    Departamento de Quimica, CICECO, Universidade de Aveiro, 3810-193 Aveiro, Portugal;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号