Thermodynamic Properties of Methanol

Temperature Pressure Density Volume Int. energy Enthalpy Entropy C CT Sound speed Joule-Thomson 

The values in these tables were generated from the NIST REFPROP software (Lemmon, E. W., McLinden, M. O., and Huber, M. L., NIST Standard Reference Database 23 Reference Fluid Thermodynamic and Transport Properties—REFPROP, National Institute of Standards and Technology, Standard Reference Data Program, Gaithersburg, Md., 2002, Version 7.1). The primary source for the thermodynamic properties is de Reuck, K. M., and Craven, R. J. B., Methanol, International Thermodynamic Tables of the Fluid State—12, I UP AC, Blackwell Scientific Publications, London, 1993. Validated equations 

The uncertainties of the equation of state are generally 0.1% in density and 2% in the speed of sound, except in the critical region and high pressures. 

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Butcher, K. L., and Medani, M. S., 1968. Thermodynamic properties of methanol -t- benzene mixtures at elevated temperatures. J. Appl. Chem., 18 100-107. 

HER Herraiz, J., Shen, S., Fernandez, J., and Coronas, A., Thermodynamic properties of methanol + some polyethylene glycol dimethyl ether by UNIFAC and DISQUAC group-contribution models for absorption heat pitmps. Fluid Phase Equil., 155, 327, 1999. 

The temperature dependence of many properties of methanol has been described in figures, tables, and equations. Plots of vapor pressure, liquid density, liquid heat capacity, vapor heat capacity, heat of vaporization, surface tension, liquid thermal conductivity, vapor thermal conductivity, liquid viscosity, and vapor viscosity against temperature have been given by Yaws [13] and by Flick [14]. Tables of vapor pressure [3,1517], liquid density [3,15,17], liquid volume [16], vapor density [15,17], vapor volume [16], liquid viscosity [15,18], vapor viscosity [15], surface tension [15,19], liquid heat capacity [15,17,20], vapor heat capacity [3,15,17], solid heat capacity [11], liquid thermal conductivity [15,17], vapor thermal conductivity [15], second viral coefficient [16], dielectric constant [21], refractive index [3], and heat of vaporization [16] have also been published. Thermodynamic properties of methanol in the condensed phases have been tabulated by Wilhoit et al. [11], and those in the gas phase have been given by Chao et aL [9]. 

Zhong Y, Warren GL, Patel S (2008) Thermodynamic and structural properties of methanol-water solutions using nonadditive interaction models. J Comput Chem 29(7) 1142-1152... 

Our recent research efforts have been directed to developing an improved and extended set of parameters for the various groups used in the PFGC equation of state (16). We have dubbed our version of this equation the PFGC-MES. A thorough evaluation of the ability of this equation to predict the thermodynamic properties of hydrocarbon systems has been a part of this development process. A companion project has been the extension of the equation to describe the behavior of hydrocarbon-water-alcohol-nonhydrocarbon systems. This paper gives some of the results of our work on hydrocarbon-water-methanol systems. We also report some of our work on extending the SRK equation of state to hydrocarbon water systems. 

We have made a quantitative investigation of the spectra of methanol, ethanol and 6-butanol over rather wide temperature and concentration ranges ( —15° to + 60°C, and 0 005 to 1 M) in order to obtain more precise information as to the spectral and thermodynamic properties of the alcohol systems. We are particularly interested in establishing such properties for a single specific species, the dimer. 

The (liquid 4- liquid) equilibria diagram for (cyclohexane + methanol) was taken from D. C. Jones and S. Amstell, The Critical Solution Temperature of the System Methyl Alcohol-Cyclohexane as a Means of Detecting and Estimating Water in Methyl Alcohol , J. Chem. Soc., 1930, 1316-1323 (1930). The G results were calculated from the (vapor 4- liquid) results of K. Strubl, V. Svoboda, R. Holub, and J. Pick, Liquid-Vapour Equilibrium. XIV. Isothermal Equilibrium and Calculation of Excess Functions in the Systems Methanol -Cyclohexane and Cyclohexane-Propanol , Collect. Czech. Chem. Commun., 35, 3004-3019 (1970). The results are from M. Dai and J.-P.Chao, Studies on Thermodynamic Properties of Binary Systems Containing Alcohols. II. Excess Enthalpies of C to C5 Normal Alcohols + 1,4-Dioxane , Fluid Phase Equilib., 23, 321-326 (1985). 

Thermodynamic properties of the flow streams at various locations as well as the thermal and mechanical energy flows for the cycle are shown in Figure 2 using 1 g-mole of liquid methanol as the basis. Also shown in the figure are the magnitudes of entropy production and exergy destruction in each of the process steps. 

The main thermodynamic properties of the methanol and ethanol steam reforming reactions are plotted in Fig. 18.3 for comparison. Both are endothermic. However, they are spontaneous, due to large entropy changes associated with the dissociation of the alcohols. Spontaneous methanol dissociation is obtained at a lower temperature (AG < 0 at - 325 K) compared to ethanol (AG < 0 at 475 K), which requires practical dissociation temperatures of 600 K. It is therefore possible to incorporate a palladium permeation membrane into a methanol steam reformer (in such cases, both processes are operating at the same temperature) whereas for ethanol, reforming and extraction of hydrogen are usually performed in two separate... 

Segovia, J. J. Martin, M. C. Chamorro, C. R. Villamanan, M. A. Excess thermodynamic properties of binary and ternary mixtures containing methyl 1,1-diinethylethyl ether (MTBE), n-heptane, and methanol at T = 313.15 K7. Chem. Thermodyn. 1999,31, 1231-1246... 

Campbell, A. N. Kartzmark, E. M. Thermodynamic and other properties of methanol -1- acetone, caibon disulphide -1- acetone, carbon disulphide-1-methanol, and carbon disulphide + methanol + acetone/. Chem. Thermodyn. 1973,5, 163-172... 

Ivanova EE, Aleksandrov VV (1964) Thermodynamic properties of electrolytes in nonaqueous solutions. XV. Solutions of cesium iodide in methanol and cadmium chloride in 1-butanol. Zhumal Fizicheskoi Khimii 38 878-84... 

Ambrose, D., Sprake, C.H.S., Townsend, R., 1975. Thermodynamic properties of organic oxygen compounds XXXVn. Vapour pressures of methanol, ethanol, pentan-1 -ol, and octan-1 -ol from the normal boiling temperature to the critical temperature. J. Chem. Thermodyn. 7,185-190. 

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