alexa Dearomatization of Normal Paraffin by Synthesized Nax Zeolite
ISSN: 2157-7048

Journal of Chemical Engineering & Process Technology
Open Access

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Research Article

Dearomatization of Normal Paraffin by Synthesized Nax Zeolite

Hossein Faghihian1*and Leila Riazi1,2
1Department of Chemistry, Shahreza Branch, Islamic Azad University, Iran
2R&D Department, Iranian Chemical Industries Investment Company, Isfahan, Iran
Corresponding Author : Hossein Faghihian
Department of Chemistry, Shahreza Branch
Islamic Azad University, 86145-311, Iran
Tel: +983213213095
Fax: +983213213095
E-mail: [email protected]
Received July 01, 2013; Accepted September 24, 2013; Published September 27, 2013
Citation: Faghihian H, Riazi L (2013) Dearomatization of Normal Paraffin by Synthesized Nax Zeolite. J Chem Eng Process Technol 4:174. doi:10.4172/2157-7048.1000174
Copyright: © 2013 Faghihian H, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Aromatic compounds produced in linear alkyl benzene (LAB) production process decrease the yield and quality of the product and enhance the deactivation rate of the catalysts. Therefore, the de-aromatization of different streams in LAB production complex is inevitable. In this research, the recycled paraffin from alkylation to dehydrogenation unit was de-aromatized by synthesized NaX zeolite. The effect of different parameters such as temperature, amount of the adsorbent, contact time and initial aromatic concentration was studied and optimized. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. It was concluded that the Langmuir model agreed very well with the experimental data. The calculated thermodynamic parameters of the adsorption showed that the adsorption process was spontaneous and exothermic. The reaction rate was estimated by the pseudo-second order kinetic model. To examine the re-generation ability of the adsorbent a fixed bed column was designed and the breakthrough curves were prepared for three successive regeneration cycles. The results indicated that the adsorbent capacity remained unchanged after three regeneration cycles.

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