Screening ionic liquids as candidates for separation of acid gases: Solubility of hydrogen sulfide, methane, and ethane
Screening ionic liquids as candidates for separation of acid gases: Solubility of hydrogen sulfide, methane, and ethane
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DOI：
10.1002/aic.14081
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发表时间：
2013-08-01
期刊：
影响因子：
3.7
通讯作者：
Marriott, Robert A.
中科院分区：
文献类型：
--
作者：
Mortazavi-Manesh, Soheil;Satyro, Marco A.;Marriott, Robert A.
天然气的主要组分在离子液体(ILS)中的溶解度可以用来确定它们从生产气流中脱除酸性气体的潜力。我们开发了在天然气处理中遇到的典型条件下，H_2S、CH_4和C_2H_6在ILS中的溶解度的模型。在这项工作中，现实溶剂化的导体屏蔽模型被用来预测ILS中溶质的活度系数，而立方状态方程被用来从理想的汽相修正。当实验数据在理想条件下不可用时，经验关联式被用来外推溶解度；本研究的目标是298.15 K和2000 kpa。根据CH4和C2H6对二氧化碳和硫化氢吸收的较高选择性，对400多种可能的ILS进行了排名。最有希望用于酸性气体处理的离子液体中，最好的15%(58)主要含有阴离子BF4、NO3和CH3SO4以及阳离子N-4111、PMG和TMG。(C)2013美国化学工程师学会学报，59：2993-3005,2013
The solubility of the major constituents of natural gas in ionic liquids (ILs) can be used to identify their potential for acid gas removal from a producing gas stream. We have developed models for the solubility of H2S, CH4, and C2H6 in ILs at typical conditions encountered in natural gas treatment. In this work, a conductor-like screening model for realistic solvation was used to predict the activity coefficients for solutes in ILs and a cubic EOS was used for vapor-phase corrections from ideality. Empirical correlations were developed to extrapolate solubilities where experimental data are not available at desired conditions; targeted in this study at 298.15 K and 2000 kPa. Over 400 possible ILs were ranked based on the higher selectivity of absorption of CO2 and H2S over CH4 and C2H6. The best 15% (58) of promising ILs for sour gas treatment predominantly contain the anions BF4, NO3, and CH3SO4 and the cations N-4111, pmg, and tmg. (c) 2013 American Institute of Chemical Engineers AIChE J, 59: 2993-3005, 2013