Publication Date:
2014-08-27
Description:
The adsorption of the main components of the Parex process, i.e., p -xylene, m -xylene, o -xylene, ethylbenzene, p -diethylbenzene, and toluene, was studied in a batch adsorber operating under the conditions of an industrial unit (177 °C, 9 bar). Prior to each experiment, the faujasitic-type adsorbent was pretreated under helium flow to control the hydration level of the adsorbent. The experimental uptake curves were used to determine adsorption equilibrium data, which were fitted with Langmuir-type isotherms. A mathematical model in which the macropore diffusion is the rate-controlling mechanism, satisfactorily describes the experimental uptake curves. The Parex process, used for the separation of p -xylene is based on the affinity differences to the adsorbent between p -xylene and the other components of the feed. The adsorption of these components is studied under industrial conditions using experimental uptake curves obtained from batch experiments and mathematical modeling with the macropore diffusion rate as the rate-controlling mechanism.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
