B 16 Baidakov, V. G. Nucleation in Liquid Ethane with Small Additions of Metha [Electronic resource] / V. G. Baidakov, A. M. Kaverin, A. S. Pankov // Journal of Physical Chemistry C. - 2012. - Vol.116, №38. - P20458-20464 Рубрики: ФИЗИКА Кл.слова (ненормированные): LIQUID -- SPONTANEOUS BOILING-UP -- ETHANE–METHANE SOLUTIONS Аннотация: The method of measuring the lifetime of a liquid in a metastable (superheated) state has been used to investigate the kinetics of spontaneous boiling-up of ethane–methane solutions. The temperature dependence of the solution mean lifetime has been traced at two values of methane concentration (2.1 and 6.0 mol %) and two pressures (1.0 and 1.6 MPa). The results of experiments are compared with classical homogeneous nucleation theory. For pure ethane at small (<8.9 s) lifetimes, one can observe a systematic “under-heating” (0.5–0.7 K) of the solution against theoretical values of the limiting superheating temperature. Dissolution of 6 mol % of methane in ethane results in a solution “superheating” of 0.7 K in excess of the theoretical value. The slopes of experimental curves at small (<8.9 s) lifetimes are in satisfactory agreement with theory. When the mean lifetimes exceed the value of 8.9 s, one can observe considerable deviations of experimental curves from theoretical lines. The discrepancies are discussed in the context of models of heterogeneous and initiated nuc \\\\Expert2\\nbo\\Journal of Physical Chemistry C\\2012, v. 116, p.20458.pdf |