Petroleum Science >2013, Issue 3: 408-414 DOI: https://doi.org/10.1007/s12182-013-0289-y
Dearomatization of normal paraffin by adsorptionprocess using synthesized NaX zeolite Open Access
文章信息
作者：Hossein Faghihian and Leila Riazi1
作者单位：
Department of Chemistry, Shahreza Branch, Islamic Azad University, 86145-311, Iran;1 Department of Chemistry, Shahreza Branch, Islamic Azad University, 86145-311, Iran 2 R&D Department, I. C. I. I. C., Isfahan, Iran
投稿时间：2013-03-20
引用方式：Hossein, F. & Leila, R. Pet. Sci. (2013) 10: 408. https://doi.org/10.1007/s12182-013-0289-y
文章摘要
Linear alkyl benzenes (LABs) are the main materials for detergent production. The presence
of aromatic compounds in this material can decrease the quality of the final product and enhance the
deactivation rate of catalysts. In this research we used zeolite NaX for de-aromatization of the recycled
paraffin from the alkylation unit of an LAB production complex. The effect of different parameters on
the removal efficiency of adsorbent was studied and optimized. To study the re-usability of the adsorbent,
the breakthrough curves were obtained by using a fixed bed column filled with the adsorbent. The results
indicated that the adsorbent capacity remained unchanged after three regeneration cycles. The Langmuir
and Freundlich adsorption models were applied to describe the equilibrium isotherms. It was concluded
that the Langmuir model agreed 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.
of aromatic compounds in this material can decrease the quality of the final product and enhance the
deactivation rate of catalysts. In this research we used zeolite NaX for de-aromatization of the recycled
paraffin from the alkylation unit of an LAB production complex. The effect of different parameters on
the removal efficiency of adsorbent was studied and optimized. To study the re-usability of the adsorbent,
the breakthrough curves were obtained by using a fixed bed column filled with the adsorbent. The results
indicated that the adsorbent capacity remained unchanged after three regeneration cycles. The Langmuir
and Freundlich adsorption models were applied to describe the equilibrium isotherms. It was concluded
that the Langmuir model agreed 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.
关键词
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Dearomatization, LAB, zeolite, adsorption, separation