Influence of monovalent alkaline metal cations on binder-free nano-zeolite X in para-xylene separation

Milad Rasouli; Nakisa Yaghobi; Seyedeh Zahra Movassaghi Gilani; Hossein Atashi; Majid Rasouli

doi:10.1016/j.cjche.2014.11.005

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Influence of monovalent alkaline metal cations on binder-free nano-zeolite X in para-xylene separation

分离科学与工程 | Updated：2026-01-06

- Influence of monovalent alkaline metal cations on binder-free nano-zeolite X in para-xylene separation
- Chinese Journal of Chemical Engineering Vol. 23, Issue 1, Pages: 64-70(2015)
- Affiliations：
  
  1. 2 Petrochemical Department, Iran Polymer and Petrochemical Institute, Tehran,Iran
  2. 3 Chemical Engineering Department, Amirkabir University of Technology, Tehran,Iran
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2014.11.005
  CLC：
- Published：2015
- Accepted：
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Milad Rasouli, Nakisa Yaghobi, Seyedeh Zahra Movassaghi Gilani, Hossein Atashi, Majid Rasouli . Influence of monovalent alkaline metal cations on binder-free nano-zeolite X in para-xylene separation[J]. Chin.J.Chem.Eng., 2015, 23(1): 64-70.
DOI：

Milad Rasouli, Nakisa Yaghobi, Seyedeh Zahra Movassaghi Gilani, Hossein Atashi, Majid Rasouli . Influence of monovalent alkaline metal cations on binder-free nano-zeolite X in para-xylene separation[J]. Chin.J.Chem.Eng., 2015, 23(1): 64-70. DOI： 10.1016/j.cjche.2014.11.005.

摘要

Abstract

The adsorption process was studied for separating para-xylene fromxylenemixture on modified nano-zeolite X in a breakthrough system. Nano-zeolitic adsorbent with different ratios of SiO

/Al

was synthesized through hydrothermal process and ion-exchanged with alkaline metal cations like lithium

sodium and potassium. The product was characterized by X-ray diffraction

scanning electron microscopy (SEM)

nitrogen adsorption

transform electron microscopy (TEM) and in situ Fourier transform infrared (FTIR) spectroscopy. The influence of nano-zeolite water content and desorbent type on the selectivity of para-xylene toward other C

aromatic isomers was studied. The optimization of adsorption process was also investigated under variable operation conditions. The isotherm for each isomer of C

aromatics and the desorbents possess the adsorption characteristics of Langmuir type. The selectivity factor of para-xylene relative to each of meta-xylene

ortho-xylene and ethylbenzene under the optimum conditions obtained to be 5.36

2.43 and 3.22

in the order given.

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