Vapor pressure and enthalpy of vaporization of trimethylolpropane and carboxylic acids esters

Krasnykh, E. L.; Druzhinina, Yuliya A.; Portnova, S. V.; Smirnova, Yana A.

doi:10.1016/j.fluid.2018.01.018

Cited by 13 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Heat capacity of a pure substance is an important thermodynamic property, and it can be used to calculate the changes of enthalpy and entropy over different temperature ranges. − As an essential part of p – V – T data, liquid density plays an important role in chemical thermodynamics and engineering design. It is indispensable in the calculation of chemical processes such as fluid mechanics, heat transfer, and mass transfer. − In addition, vapor pressure and vaporization enthalpy data are essential to optimize industrial synthesis and separation technologies. − …”

Section: Introductionmentioning

confidence: 99%

Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl dl-Lactate

Zeng

et al. 2019

J. Chem. Eng. Data

View full text Add to dashboard Cite

The density and the heat capacity at saturation vapor pressure of isoamyl dl-lactate were measured at a temperature range of 288.15–453.65 K using a capillary pycnometer and adiabatic calorimeter, respectively. The Antoine equation was used to correlate the vapor pressure data which was determined with an ebulliometric technique at a temperature range of 374.59–478.56 K, and the deviation between the calculated value and the experimental data was less than 0.87%. On the basis of the Clausius–Clapeyron equation, the vaporization enthalpy of isoamyl dl-lactate at atmospheric pressure boiling point (T b, 474.89 K) was calculated to be 43.27 kJ/mol. According to the Othmer’s method, the standard vaporization enthalpy, Δvap H (298.15 K) was estimated using octanol and heptanol as reference substances, and the results are 57.21 and 57.35 kJ/mol, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl dl-Lactate

Zeng

et al. 2019

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…The correlation of enthalpies of vaporization with the number of C atoms in the series of homologues is a test of the internal consistency of the experimental results. ,,, The plot of Δ l g H m o (298.15 K) against the number of carbon atoms in linear aliphatic esters of glycolic acid HO–CH 2 –COO–(CH 2 ) n H with n = 1–8 is presented in Figure . As can be seen, the value Δ l g H m o (298.15 K) of methyl glycolates shows scatter around the linear correlation.…”

Section: Resultsmentioning

confidence: 99%

“…The difference of the isobaric molar heat capacities of the gaseous and liquid phase was estimated by the Quantitative Structure-Property Relationship (QSPR) method. , …”

Section: Experimental Sectionmentioning

confidence: 99%

Vapor Pressure, Vaporization Enthalpies, Critical Parameters, and Heat Capacities of Alkyl Glycolates

et al. 2020

Self Cite

View full text Add to dashboard Cite

Developing biotechnological methods to produce glycolic acid and alkyl glycolates requires knowledge of thermophysical and thermodynamic data. Vapor pressures of linear alkyl glycolates HO–CH2–COO–(CH2) n –H with n = 1–8 were determined by the transpiration method. Standard molar enthalpies of vaporization at experimental temperature and at 298.15 K were derived from the temperature dependence of the vapor pressure. The critical temperatures and pressures of alkyl glycolates were measured by the pulse-heating method. The experimental data were successfully checked for internal consistency. Molar heat capacity of atmospheric pressure for liquid esters was measured by the method of differential scanning calorimetry in the temperature range 303–423 K. The molar liquid heat capacities at 298.15 K and atmospheric pressure of alkyl glycolates were calculated from the result of this work. The measured values were used for estimating prediction capabilities of group-contribution methods by Constantinou and Gani, Marrero and Gani, and Hukkerikar et al. for critical properties and Chickos and Acree, Domalski and Hearing, and Ceriani et al. for heat capacity at 298.15 K. Results of this study could be used for the design and optimization of the chemical processes of the utilization of renewable feedstock.

show abstract

“…Дескрипторный метод заключается в том, что какое-нибудь свойство соединения может быть выражено через функцию от одного или нескольких дескрипторов. В качестве последних могут выступать физико-химические, пожароопасные, структурные и молекулярные характеристики химических соединений [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Сравнительный метод, или Additivity Rules, разработан в середине XX столетия для теоретического определения различных физико-химических свойств органических соединений.…”

unclassified

“…12 арифметически среднее между значениями показателей ближайших соседей по гомологическому ряду, и ПУЦ 2, в котором предусматривается использование уравнений на основе дескриптора УУЦ. Порядок применения методики ПУЦ 1 и ПУЦ 2 с примерами приведен в работах[2,22,23].The methods of RCC 1, RCC 2 and the comparison equations Примечания.…”

unclassified

Prediction of Physical-Chemical and Fire Hazard Characteristics by Carbon Chain Rules.1. Alkanals

S.¹,

G.²,

M.³

2018

J. Sib. Fed. Univ. Chem.

View full text Add to dashboard Cite

Investigations of the dependence of physico-chemical and fire hazard properties from the chemical structure of alkanals are carried out. Forecasting the boiling temperature, the flash point, the temperature and concentration flammability limits, the heats of combustion and vaporization is performed by the rules of the carbon chain. For the convenience of practical application of the rules of the carbon chain, the following empirical equations for the calculation of physico-chemical and fire hazard indices from the conventional carbon chain and from the number of carbon atoms are proposed. A comparative analysis of the proposed methods for calculating the flash point and the methods of GOST 12.1.044-89, Mendeleev and ACD/Lab 2014 is carried out. It is shown that the new methods basically give more accurate calculation results than the comparison design procedures.

show abstract

Vapor pressure and enthalpy of vaporization of trimethylolpropane and carboxylic acids esters

Cited by 13 publications

References 8 publications

Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl dl-Lactate

Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl dl-Lactate

Vapor Pressure, Vaporization Enthalpies, Critical Parameters, and Heat Capacities of Alkyl Glycolates

Prediction of Physical-Chemical and Fire Hazard Characteristics by Carbon Chain Rules.1. Alkanals

Contact Info

Product

Resources

About