Separation and effect of residual moisture in liquid phase adsorption of xylene on y zeolites

Brazilian Journal of Chemical Engineering

P. Lahot²  M. Rani²  S. Maken¹ 

[1] ,Deenbandhu Chhotu Ram University of Science & Technology Department of Chemical Engineering Sonepat,India

关键词: Adsorption;    Adsorption capacity;    Optimization of activation temperature;    C8 isomers;    Zeolite;   

DOI  :  10.1590/0104-6632.20140312s00002302

来源: SciELO

【 摘 要 】

The separation of p-xylene and m-xylene from C8 aromatic hydrocarbon feed using Y zeolites is investigated. Effect of residual moisture on p-xylene adsorption on BaY was measured in order to optimize the activation temperature of the adsorbent. The results show that with an increase in temperature the moisture on the adsorbent decreases. An optimum loading of moisture is required for adsorption of xylene on the adsorbents. The Everett equation is used to determine the adsorption capacity and selectivity. It has been found that the adsorbents best suited for the separation of p-xylene, m-xylene, o-xylene and ethyl benzene from the mixture of C8 aromatics are NaY, NaY, BaY and KY, respectively. The XRD results show that the crystallinity of the adsorbent decreases upon exchanging the zeolites to K+ and Ba2+ ions.

【 授权许可】

CC BY   
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