A kinetic model and parameters estimate for the synthesis of 2-phenyloctane: a starting material of bio-degradable surfactant

ABSTRACT

In this article, we have proposed a kinetic model of a 2-phenyloctane formation from benzene and 1-octene in the presence of Y zeolite CVB760 solid acid catalyst. The typical elementary reaction involved in benzene alkylation consists of isomerisation of π-bond of 1-octene and attachment of octyl ion with benzene. Here, we have followed transition state theory and statistical thermodynamics to express the rate expression for the disappearance of 1-octene and formation of 1-octene and 2-phenyloctane isomers. In transition state theory, we have incorporated a single-event concept to account for a change in the relative position of the atom during the chemical reaction. Subsequently, we also estimate activation energies involved in the kinetic model using the regression method and experimental data. For this, a particle swarm optimisation (PSO) followed by Levenberg–Marquardt algorithm, called hybrid PSO, is adopted to measure the activation energies. The statistical methods involved in this investigation include analysis of variance, F-test and parity diagram and comparison between the proposed kinetic model and experimental data confirm the kinetic model reliability and optimal estimate of activation energies.

GRAPHICAL ABSTRACT

KEYWORDS:

• Alkylation
• 1-octene
• 2-phenyloctane
• activation energy
• optimisation

Acknowledgments

The authors would like to thank Prof. Periyasamy Balasubramanian, Ex Assistant Professor in the Department of Chemical Engineering at the Indian Institute of Technology Guwahati, for the guidance.

Disclosure statement

No potential conflict of interest was reported by the author(s).