Solubility and diffusivity of difluoromethane in room-temperature ionic liquids

被引：178

作者：

Shiflett, MB ^{[1
]}

Harmer, MA

Junk, CP

Yokozeki, A

机构：

[1] DuPont Cent Res & Dev, Expt Stn, Wilmington, DE 19880 USA

[2] DuPont Fluoroprod Lab, Wilmington, DE 19880 USA

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2006年 / 51卷 / 02期

关键词：

D O I：

10.1021/je050386z

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

New experimental results are presented for the solubility and diffusivity of difluoromethane in 19 room-temperature 14 ionic liquids (RTILs). In the series of RTILs presented here, eight RTILs with five new fluorocarbon sulfonate anions have been prepared for the first time. The measurements were performed using a gravimetric microbalance at temperatures between (283.15 and 348.15) K and at pressures from (0.01 to 1.0) MPa. Experimental gas solubility data were successfully correlated with the nonrandom two-liquid (NRTL) solution model. The solubility of difluoromethane in RTILs is affected by the choice of both the cation and anion. Diffusivities obtained from the time-dependent absorption data were well analyzed using a model based on a modified Stokes-Einstein equation. The calculated molecular size for difluoromethane is 2 to 3 times larger than the known size.

引用

页码：483 / 495

页数：13

共 36 条

[1] Electrochemical investigations in liquid and supercritical 1,1,1,2-tetrafluoroethane (HFC 134a) and difluoromethane (HFC 32) [J].

Abbott, AP ;

Eardley, CA ;

Harper, JC ;

Hope, EG .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1998, 457 (1-2) :1-4

[2] Conductivity of (C4H9)4N BF4 in liquid and supercritical hydrofluorocarbons [J].

Abbott, AP ;

Eardley, CA .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (39) :9351-9355

[3] Electrolyte solutions: from thermodynamic and transport property models to the simulation of industrial processes [J].

Anderko, A ;

Wang, PM ;

Rafal, M .

FLUID PHASE EQUILIBRIA, 2002, 194 :123-142

[4]

[Anonymous], D44588 ASTM

[5] Solubilities and thermodynamic properties of gases in the ionic liquid 1-n-butyl-3-methylimidazolium hexafluorophosphate [J].

Anthony, JL ;

Maginn, EJ ;

Brennecke, JF .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (29) :7315-7320

[6] Application of IR-spectroscopy in thermodynamic investigations of associating solutions [J].

Asprion, N ;

Hasse, H ;

Maurer, G .

FLUID PHASE EQUILIBRIA, 2003, 205 (02) :195-214

[7] Thermodynamic and IR spectroscopic studies of solutions with simultaneous association and solvation [J].

Asprion, N ;

Hasse, H ;

Maurer, G .

FLUID PHASE EQUILIBRIA, 2003, 208 (1-2) :23-51

[8] FT-IR spectroscopic investigations of hydrogen bonding in alcohol-hydrocarbon solutions [J].

Asprion, N ;

Hasse, H ;

Maurer, G .

FLUID PHASE EQUILIBRIA, 2001, 186 (1-2) :1-25

[9] Why is CO2 so soluble in imidazolium-based ionic liquids? [J].

Cadena, C ;

Anthony, JL ;

Shah, JK ;

Morrow, TI ;

Brennecke, JF ;

Maginn, EJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (16) :5300-5308

[10] Gas solubilities in room-temperature ionic liquids [J].

Camper, D ;

Scovazzo, P ;

Koval, C ;

Noble, R .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2004, 43 (12) :3049-3054

← 1 2 3 4 →