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Mursalov, B.A.; Abdulagatov, Ilmutdin M.; Dvoryanchikov, V. I.; Kamalov, A. N.; Kiselev, S. B.

doi:10.1023/a:1021497206995

Cited by 43 publications

(21 citation statements)

References 9 publications

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“…The method of quasi-static thermograms (isochoric heat-capacity jumps and temperature versus time, T − τ , plot) was used in this work to accurately determine the location of the phase-boundary parameters (T S , ρ S , ρ S ) of pure methanol. Details of the method of quasi-static thermograms and its application to complex thermodynamic systems with different types of phase transitions (pure fluids and binary solutions with L-V, L-L, L-S, V-S, L-S-V, and L-L-S phasetransitions) are described in recent publications [36,40,41,[45][46][47].…”

Section: Measurements: Methods Of Quasi-static Thermogramsmentioning

confidence: 99%

“…The theory and physical basis of the method of the heat-capacity measurements, and details of the apparatus, procedures, and uncertainty assessment have been described in our previous publications [31][32][33][34][35][36][37][38][39][40][41]; therefore, only essential information will be given here. In this method the heat capacities at constant volume are obtained by measuring the heat input necessary for a given temperature change of a fluid contained in a spherical calorimeter.…”

Section: Isochoric Heat-capacity Measurementsmentioning

confidence: 99%

“…In this method the heat capacities at constant volume are obtained by measuring the heat input necessary for a given temperature change of a fluid contained in a spherical calorimeter. The heat capacity is obtained from measurements of the following quantities: m, mass of the fluid in the calorimeter; Q, electrical energy dissipated by the inner heater; T , temperature change resulting from addition of an energy Q; and C 0 , empty calorimeter heat capacity as [31][32][33][34][35][36][37][38][39][40][41] …”

Section: Isochoric Heat-capacity Measurementsmentioning

confidence: 99%

“…A detailed uncertainty analysis of the method (all of the measured quantities and corrections) is given in our previous publication [36]. The uncertainty in C V due to departures from full adiabatic control is 0.013 kJ·K −1 .…”

Section: Isochoric Heat-capacity Measurementsmentioning

confidence: 99%

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Isochoric Heat-Capacity Measurements for Pure Methanol in the Near-Critical and Supercritical Regions

et al. 2007

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Isochoric heat-capacity measurements for pure methanol are presented as a function of temperature at fixed densities between 136 and 750 kg·m −3 . The measurements cover a range of temperatures from 300 to 556 K. The coverage includes the one-and two-phase regions, the coexistence curve, the near-critical, and the supercritical regions. A high-temperature, high-pressure, adiabatic, and nearly constant-volume calorimeter was used for the measurements. Uncertainties of the heat-capacity measurements are estimated to be 2-3% depending on the experimental density and temperature. Temperatures at saturation, T S (ρ), for each measured density (isochore) were measured using a quasi-static thermogram technique. The uncertainty of the phase-transition temperature measurements is 0.02 K. The critical temperature and the critical density for pure methanol were extracted from the saturated data (T S , ρ S ) near the critical point. For one near-critical isochore (398.92 kg·m −3 ), the measurements were performed in both cooling and heating regimes to estimate the effect of thermal decomposition (chemical reaction) on the heat capacity and phase-transition properties of methanol. The measured values of C V and saturated densities (T S , ρ S ) for methanol were compared with values calculated from various multiparametric equations of state (EOS) (IUPAC, Bender-type, polynomial-type, and nonanalytical-type), scaling-type (crossover) EOS, and various correlations. The measured C V data have been analyzed and interpreted in terms of extended scaling equations for 163 0195-928X/07/0200-0163/0 © 2007 Springer Science+Business Media, LLC 164 Polikhronidi et al.the selected thermodynamic paths (critical isochore and coexistence curve) to accurately calculate the values of the asymptotical critical amplitudes (A ± 0 and B 0 ).

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Section: Measurements: Methods Of Quasi-static Thermogramsmentioning

confidence: 99%

Section: Isochoric Heat-capacity Measurementsmentioning

confidence: 99%

Section: Isochoric Heat-capacity Measurementsmentioning

confidence: 99%

Section: Isochoric Heat-capacity Measurementsmentioning

confidence: 99%

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Isochoric Heat-Capacity Measurements for Pure Methanol in the Near-Critical and Supercritical Regions

et al. 2007

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“…The experimental details (the physical basis and theory of the method, the apparatus, experimental procedures and an uncertainty assessment) of the isochoric heat-capacity measurements have been described in our earlier publications [13][14][15][16][17][18][19][20]. Only a brief review will be given in this study.…”

Section: Methodsmentioning

confidence: 99%

Experimental study of the isochoric heat capacity and coexistence-curve singular diameter of sec-butanol near the critical point and Yang-Yang anomaly strength

Radzhabova

Степанов

Abdulagatov

et al. 2013

Physics and Chemistry of Liquids

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One-and two-phase isochoric heat capacities (C V ) and saturated liquid and vapour densities (T S , 0 S and 00 S ) of sec-butanol near the critical point have been measured with a high-temperature and high-pressure nearly constantvolume adiabatic calorimeter. The measurements were made in the temperature range from 307 K to 551 K for 22 liquid and vapour isochores from 76.44 to 794.06 kg m À3 . The isochoric heat capacity jump (quasi-static thermograms supplemented by the sensor of adiabatic control) technique have been used to accurately measure of the phase transition parameters (T S , S ) near the critical point. The total experimental uncertainty of density (), temperature (T) and isochoric heat capacity (C V ) measurements were estimated to be 0.06%, 15 mK and 2-3%, respectively. The critical temperature (T C ¼ 535.95 AE 0.02 K) and the critical density ( C ¼ 276.40 AE 2 kg m À3 ) for sec-butanol were determined from the measured saturated properties (C VS , T S , S ) near the critical point. The measured C V and saturated density (T S , S ) data near the critical point have been analysed and interpreted in terms of extended scaling theory for the selected thermodynamic paths (critical isochore and coexistence curve) to accurately calculate the values of the asymptotical critical amplitudes of heat capacity (A AE 0 ) and coexistence curve (B 0 ). The measured thermodynamic properties (C V , T S , S ) of sec-butanol near the critical point were also interpreted in terms of the 'complete scaling' theory of critical phenomena and the theory of logarithmic singularity of C V . In particular, the contributions of the 'incomplete' (B 2 t 1À ) and 'complete' (B 4 t 2 ) scaling terms on the coexistence-curve singular diameter were estimated. We determined the values of the asymmetry parameters a 3 and b 2 of the 'complete' scaling theory of coexistence curve singular diameter. The strength of the Yang-Yang anomaly R for sec-butanol was estimated using asymmetry parameters a 3 and the contribution of the second temperature derivative of vapour-pressure and chemical potential in the singularity of two-phase isochoric heat capacity, C V2 , at the critical point.

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Bulk Properties of SCW

Marcus¹

2012

Supercritical Water

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Untitled

Cited by 43 publications

References 9 publications

Isochoric Heat-Capacity Measurements for Pure Methanol in the Near-Critical and Supercritical Regions

Isochoric Heat-Capacity Measurements for Pure Methanol in the Near-Critical and Supercritical Regions

Experimental study of the isochoric heat capacity and coexistence-curve singular diameter of sec-butanol near the critical point and Yang-Yang anomaly strength

Bulk Properties of SCW

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