4.6 Article

Adsorptive separation of meta-xylene from C8 aromatics

Journal

CHEMICAL ENGINEERING RESEARCH & DESIGN
Volume 90, Issue 9, Pages 1407-1415

Publisher

INST CHEMICAL ENGINEERS
DOI: 10.1016/j.cherd.2011.11.016

Keywords

Adsorptive separation; Na-Y zeolite; Selectivity factor; C-8 aromatics

Funding

  1. SPEC Company

Ask authors/readers for more resources

Industrial adsorptive separation process for liquids is most successful when the involved species have very close boiling points, making distillation expensive or are thermally sensitive at convenient distillation temperatures. The adsorption process was studied for separating meta-xylene from a feed mixture containing all C-8 aromatics on binder-free X and Y zeolites in the liquid phase. Zeolitic adsorbents with different SiO2/Al2O3 were synthesized by the hydrothermal method and ion-exchanged with alkaline metal cations like lithium, sodium and potassium. The adsorption process was carried out in a breakthrough system at temperature of 110-160 degrees C and pressure of 6-8 atm. The influence of adsorbent moisture content on the separation process was studied. The optimization of adsorption process was also investigated by the changing operation conditions. The isotherms for each isomer of C-8 aromatics and the desorbent possess the adsorption characteristics of Langmuir type. The selectivity factor of meta-xylene and the saturation adsorption capacities of adsorbates were determined. It was observed that the selectivity of meta-xylene increased by sodium ion-exchanging of cationic sites in Y zeolite and the selectivity factor of meta-xylene/para-xylene, meta-xylene/ortho-xylene and meta-xylene/ethylbenzene in the optimum conditions was determined to be 2.62, 2.83 and 5.93, respectively. (C) 2011 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available