1,2-Propanediol. Comprehensive experimental and theoretical study

Benchmark thermodynamic properties of 1,3-propanediol: Comprehensive experimental and theoretical study

“…In fact, from 16 entries for vaporisation enthalpies D g l H m (T = 298.15 K), most of results were close to 70 kJ Á mol À1 within the boundaries of experimental uncertainties of (1 to 3) kJ Á mol À1 . Similar to our previous observation for 1,2-propanediol [9], the direct calorimetric result for 1,3-propanediol D g l H m (T = 298.15 K) = (72.4 ± 0.3) kJ Á mol À1 , measured by Knauth and Sabbah [25] with a Tian-Calvet calorimeter equipped with a Knudsen effusion cell, differs from the recent static and transpiration results significantly. A commercial sample of 1,3-propanediol (98%, Aldrich) used by Knauth and Sabbah [25] was purified additionally by fractional distillation over a rotating band column with 30 theoretical plates.…”

“…New additional experiments with 1,3-propanediol are intending to resolve contradictions among available data. This contribution complements and extends our previous work on thermodynamics of aliphatic diols by our group [4,8,9]. The aim of this study is an experimental and computational study of 1,3-propanediol in order to evaluate available thermochemical properties.…”

Thermodynamic properties of glycerol: Experimental and theoretical study

“…Vapor pressures, vaporization enthalpies, as well as the gas phase thermodynamic properties of glycerol still require a careful evaluation. This contribution complements and extends our previous work on thermodynamics of aliphatic polyols [3][4][5][6]. In the focus of currentwork was an experimental and computational study of glycerolaiming atevaluation of available thermochemical properties.…”

“…Experimental results derived in this work seem to support the conclusion from the neutron diffraction.In our previous studies of alkanols [41] and alkanediols [4][5][6] we suggested to assess the strength of the overall hydrogen bonding in the pure bulk liquid phase with help of experimental vaporization enthalpies and a conception of homomorph compound [42]. The latter conception can be explained from comparison of enthalpies of vaporization of n-alkanols and those of similar shaped alkanes.…”

Laboratory spectroscopy of 1, 2-propanediol at millimeter and submillimeter wavelengths

“…The vapor pressure of 1, 2-propanediol is rather low at room temperature, ∼19 Pa Verevkin et al (2009). To achieve a sufficient and reasonably stable vapor pressure, measurements were carried out under slow flow conditions.…”