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Study on Characteristics and Preparation of Binderless ZSM-5 Granules for Adsorption of Xylene Isomers  

Yun, Hyo-Sang (Environment & Resource Center, Korea Research Institute of Chemical Technology)
Hong, Ji-Sook (Environment & Resource Center, Korea Research Institute of Chemical Technology)
Suh, Jeong-Kwon (Environment & Resource Center, Korea Research Institute of Chemical Technology)
Shin, Chae-Ho (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Applied Chemistry for Engineering / v.21, no.4, 2010 , pp. 417-423 More about this Journal
Abstract
In this study, an effective method to prepare granular binderless ZSM-5 which is as efficient p-xylene separatory adsorbent was explored. Colloidal silica sol 30 wt% solution as an inorganic binder and microcrystalline cellulose as an organic additive were added to ZSM-5 powder ($SiO_2/Al_2O_3$ = 50). Adsorbent with enough strength (0.721 kgf), high crystallinity (94.6%) and high BET specific surface area ($379.2m^2$/g) was obtained by calcination, binderless treatment, ${NH_4}^+$ ion exchange, and activation after spherical granulation process. A batch type adsorption experiment was proceeded with solutions comprising 3 xylene isomers by 1 : 1 : 1 weight ratio to evaluate adsorption characteristics of prepared absorbent. As a result, the obtained binderless ZSM-5 granule showed a higher selective adsorption performance for para-xylene than that of commercial adsorbent.
Keywords
p-xylene; separation; adsorbent; binderless; ZSM-5;
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