N 64 Nikitin, E. D. Critical constants of n-alkanes with from 17 to 24 carbon atoms [Text] / E. D. Nikitin, P. A. Pavlov, N. V. Bessonova // Journal of Chemical Thermodynamics. - 1994. - V.26. - P177-182 Рубрики: ФИЗИКА Кл.слова (ненормированные): КОНТАКТ КРИТИЧЕСКИЙ -- n-АЛКОНЫ -- АТОМЫ КАРБОНА -- КАРБОН |
N 64 Nikitin, E. D. Vapor-liquid critical properties of squalane measured by the pulse-heating technique [Текст] / E. D. Nikitin, A. P. Popov // Fluid Phase Equilibria. - 2005. - Vol. 237, № 1-2. - С. 16-20 Рубрики: ФИЗИКА Кл.слова (ненормированные): CRITICAL POINTS -- MEASUREMENT -- ALKANES Аннотация: The critical temperature and pressure of squalane (2,6,10,15,19,23-hexamethyltetracosane) have been measured using the pulse-heating method. Residence times are from 0.03 to 1 ms. The experimental critical properties are compared with the results of measurement by a flow method, computer-simulation data, and the values calculated by the group-contribution methods. The critical temperature of squalane is about 2.5% lower and the critical pressure is 10% higher than those of its linear isomer-n-triacontane. \\\\Expert2\\NBO\\Fluid Phase Equilibria\\2005. v.237, p.16.pdf |
N 64 Nikitin, E. D. Critical properties of long-chain substances from the hypothesis of functional self-similarity [Текст] / E. D. Nikitin, P. A. Pavlov, N. S. Bogatishcheva // Fluid Phase Equilibria. - 2005. - Vol. 235, № 1. - С. 1-6 Рубрики: ФИЗИКА Кл.слова (ненормированные): CRITICAL STATE -- METHOD OF CALCULATION -- ALKANES -- ALKANOLS -- ALKANONES Аннотация: A method for the construction of the functions fitting the critical properties of homologous series is presented. The method is based on the hypothesis of functional self-similarity and the scaling behaviour of the critical constants of long-chain molecules. Equations for calculating the critical temperatures and pressures of the homologous series with the common formula H(CH2)nR, where R is a radical have been obtained. The parameters of the equations have been determined from experimental data for six homologous series. The presented method allows predicting the critical temperatures or pressures of any member of a homologous series of the given type if the critical temperature/pressure of one substance, which belongs to this series, is known. The proposed method provides better accuracy in comparison with currently used group-contribution methods for most of the homologous series considered. \\\\Expert2\\NBO\\Fluid Phase Equilibria\\2005. v.235, p.1-6.pdf |
N 64 Nikitin, E. D. Critical constants of n-alkanes with from 17 to 24 carbon atoms [Text] / E. D. Nikitin, P. A. Pavlov, N. V. Bessonova // Journal of Chemical Thermodynamics. - 1994. - V.26. - P177-182 Рубрики: ФИЗИКА Кл.слова (ненормированные): КОНТАКТ КРИТИЧЕСКИЙ -- n-АЛКОНЫ -- АТОМЫ КАРБОНА -- КАРБОН |
N 64 Nikitin, E. D. Vapor-liquid critical properties of squalane measured by the pulse-heating technique [Текст] / E. D. Nikitin, A. P. Popov // Fluid Phase Equilibria. - 2005. - Vol. 237, № 1-2. - С. 16-20 Рубрики: ФИЗИКА Кл.слова (ненормированные): CRITICAL POINTS -- MEASUREMENT -- ALKANES Аннотация: The critical temperature and pressure of squalane (2,6,10,15,19,23-hexamethyltetracosane) have been measured using the pulse-heating method. Residence times are from 0.03 to 1 ms. The experimental critical properties are compared with the results of measurement by a flow method, computer-simulation data, and the values calculated by the group-contribution methods. The critical temperature of squalane is about 2.5% lower and the critical pressure is 10% higher than those of its linear isomer-n-triacontane. \\\\Expert2\\NBO\\Fluid Phase Equilibria\\2005. v.237, p.16.pdf |
N 64 Nikitin, E. D. Critical properties of long-chain substances from the hypothesis of functional self-similarity [Текст] / E. D. Nikitin, P. A. Pavlov, N. S. Bogatishcheva // Fluid Phase Equilibria. - 2005. - Vol. 235, № 1. - С. 1-6 Рубрики: ФИЗИКА Кл.слова (ненормированные): CRITICAL STATE -- METHOD OF CALCULATION -- ALKANES -- ALKANOLS -- ALKANONES Аннотация: A method for the construction of the functions fitting the critical properties of homologous series is presented. The method is based on the hypothesis of functional self-similarity and the scaling behaviour of the critical constants of long-chain molecules. Equations for calculating the critical temperatures and pressures of the homologous series with the common formula H(CH2)nR, where R is a radical have been obtained. The parameters of the equations have been determined from experimental data for six homologous series. The presented method allows predicting the critical temperatures or pressures of any member of a homologous series of the given type if the critical temperature/pressure of one substance, which belongs to this series, is known. The proposed method provides better accuracy in comparison with currently used group-contribution methods for most of the homologous series considered. \\\\Expert2\\NBO\\Fluid Phase Equilibria\\2005. v.235, p.1-6.pdf |