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JournalISSN: 0021-9568

Journal of Chemical & Engineering Data 

About: Journal of Chemical & Engineering Data is an academic journal. The journal publishes majorly in the area(s): Solubility & Aqueous solution. It has an ISSN identifier of 0021-9568. Over the lifetime, 16825 publication(s) have been published receiving 355288 citation(s).
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Journal ArticleDOI
Abstract: Ionic liquids (ILs) are salts that are liquid at low temperatures, usually including the region around room temperature. They are under intense investigation, especially as replacement solvents for reactions and separations, since they exhibit negligible vapor pressure and would not, therefore, contribute to air pollution. Clearly, basic thermophysical properties are vital for design and evaluation for these applications. We present density as a function of temperature, melting temperatures, glass-transition temperatures, decomposition temperatures, and heat capacities as a function of temperature for a series of 13 of the popular imidazolium-based ILs. The ionic liquids investigated here are 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium bromide, 1-butyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, 1-butyl-3-methylimidazolium tris(trifluoromethylsul...

1,341 citations

Journal ArticleDOI
Abstract: A review is given of the temperature dependence of the density of liquid water from 40" to 150°C The inclusion of new literature data indicates that most previous correlations have been 10 ppm low at 70-80°C An expression is derived, Equation 16, expressed on the IPTS-68 and valid from 0" to 150"C, that is in improved agreement with most data sets Recent literature values of the velocity of sound permit the calculation of more reliable isothermal compressibilities The errors of these compressibilities;, from velocity of sound, density, thermal expansivity, and specific heat, are examined, and the error in the calculated compressibilities is estimated as 03 X lO-'bar-' at 4'C and as7 X 100°C This paper supersedes two papers previously given by the same author The revision of correlating and interpolating equations, and of estimated best values and their errors, must be repeated whenever standards are modified or a significant addition is made to the pool of experimental data At atmospheric pressure (=101325 bar), the volume or density, the thermal expansivity, and the compressibility are among the properties of liquid water that are known with sufficient precision for the introduction of the 1968 lnternational Practical Temperature Scale (72) to make it

1,287 citations

Journal ArticleDOI
Abstract: High-pressure adsorption of methane, carbon dioxide, and nitrogen on zeolite 13X was measured in the pressure range (0 to 5) MPa at (298, 308, and 323) K and fitted with the Toth and multisite Langmuir models. Isosteric heats of adsorption were (12.8, 15.3, and 37.2) kJ/mol for nitrogen, methane, and carbon dioxide respectively, which indicate a very strong adsorption of carbon dioxide. The preferential adsorption capacity of CO2 on zeolite 13X was much higher than for the other gases, indicating that zeolite 13X can be used for methane purification from natural gas or for carbon dioxide sequestration from flue gas.

932 citations

Journal ArticleDOI
Abstract: The surface tension of mixtures is a physical property of great importance for mass transfer processes such as distillation, extraction, or absorption. The surface tension of aqueous solutions of methanol, ethanol, 1-propanol, and 2-propanol was measured over the entire concentration range at temperatures of 20--50 C. The experimental values were correlated with temperature and with mole fraction. The maximum deviation was in both cases always less than 3%.

905 citations

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