New convenient vapor pressure-temperature correlation for some aliphatic hydrocarbons

Authors

  • Jane B Bogdanov Institute of Chemistry, PMF, Ss. Cyril and Methodius University
  • Bogdan Bogdanov Institute of Chemistry, Faculty of Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje

DOI:

https://doi.org/10.20450/mjcce.2013.105

Keywords:

Vapor pressure, vapor pressure- temperature equations, aliphatic hydrocarbons

Abstract

New empirical equations for correlating temperature dependence of vapor pressure for C6-C20 aliphatic hydrocarbons are proposed:

ln(VP) = k1·T/(k2+T)

where, VP – vapor pressure, T – temperature, k1 – asymptotic maximum vapor pressure, and k2 – temperature at which the vapor pressure has half of its maximum value.

Descriptors k1, k2 and k1/k2 have physical meaning and are unique for a given liquid. This “uniqueness” can be exploited for quantitative description of vapor pressure-temperature curve. The equation given above can be transformed algebraically into other convenient forms for plotting experimental data such as:

T/ln(VP) = intercept + slope·T

k1 = 1/slope; k2 = intercept/slope

These derived descriptors can be utilized for evaluation and comparison of properties of different liquids and liquid mixtures and can serve as additional parameters for analysis of liquid hydrocarbon-based fuels for internal combustion engines.

Author Biography

Jane B Bogdanov, Institute of Chemistry, PMF, Ss. Cyril and Methodius University

Assistant professor, Department of Organic chemistry and Biochemistry

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Published

2013-06-15

How to Cite

Bogdanov, J. B., & Bogdanov, B. (2013). New convenient vapor pressure-temperature correlation for some aliphatic hydrocarbons. Macedonian Journal of Chemistry and Chemical Engineering, 32(1), 109–116. https://doi.org/10.20450/mjcce.2013.105

Issue

Vol. 32 No. 1 (2013)

Section

Organic Chemistry

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