Furfural treatment from aqueous solutions by zeolites
Abstract
The feasibility of using natural zeolites as adsorbents for the removal of furfural from aqueous solutions has been studied. The results of theoretical and experimental studies on the adsorption of furfural from aqueous solutions on the studied sorbents are presented. Here was provided also a comparison between sorption efficiency of zeolites - natural clinoptilolites (Noemberyan deposit in Armenia and Semnan deposit in Iran), mordenite and the modified by acid analog from Shirak region in Armenia and synthetic ZSM-5 zeolite. The adsorption process was evaluated by the obtained experimental data for the implementation of the technological scheme for water purification from furfural. It has been established that furfural adsorption from aqueous solutions on zeolites flows past both pursuant to the theory of volumetric filling of micropores, and on a surface of sorbents depending on molecular sizes of sorbents. It has been established also that modified by acid natural mordenite and zeolite ZSM-5 were successfully tested as an adsorbents for furfural removal from aqueous solution. It has been presented the elementary version of device-technological design of water treatment from furfural with the block from two devices – the blender in which sorbent suspension in treated water mixes up before achievement adsorptive balance, and sediment bowl in which fulfilled adsorbent separates from the cleared water.
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