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Hydrogenation of aromatics compounds: Calculation of thermodynamic properties using molecular index connectivity
Author(s) -
Santos Bruno M.,
Zotin José L.,
Ndiaye Papa M.,
da Silva Mônica A. P.
Publication year - 2017
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22923
Subject(s) - decalin , tetralin , naphthalene , topological index , thermodynamics , chemistry , quantitative structure–activity relationship , enthalpy , gibbs free energy , standard enthalpy of formation , standard enthalpy change of formation , heat capacity , molecule , computational chemistry , organic chemistry , stereochemistry , solvent , physics , catalysis
In this work, calculation of relevant thermodynamics properties, for hydrogenation reaction of aromatics compounds, was performed using the approach of molecular topology. Among the several molecular topological indexes, the molecular connectivity indexes have been used widely for calculation methods like quantitative structure properties relationships (QSPR) and quantitative structure and activity relationships (QSAR). Standard enthalpy of formation (ΔH° f ), standard Gibbs free energy of formation (ΔG° f ), and heat capacity at constant pressure (C p °) at 298.15 K for naphthalene, 1‐methylnaphthalene, 2‐methylnaphthalene, tetralin, and t ‐decalin and equilibrium reaction constants were calculated and compared with experimental data reported in literature. Additionally, the results obtained for naphthalene, tetralin, and t‐ decalin were compared to those obtained from Benson's method. Results show that the thermodynamics properties calculated from molecular connectivity index presented an error less than 2 % and are closer to experimental data than those from Benson's method, showing that molecular connectivity index is a promising tool for estimation of thermodynamic properties to be used in design of chemical process.