Fisher esterification of acetic acid (or acetic anhydride) with ethanol (EtOH) is the main industrial process for the synthesis of ethyl acetate (EA). Nonetheless, the separation of the produced ester from ethanol is challenging since these volatile organic compounds (VOCs) form an azeotropic mixture. In this work, the adsorption and separation EtOH/EA/water mixtures on the ZIF-8 metal-organic framework is studied. The present study aims to characterize the adsorptive behavior of ZIF-8 with non-ideal EtOH/EA/water mixtures. Single and multicomponent adsorption isotherms, obtained by gravimetry and breakthrough experiments, show high adsorption capacity and selectivity toward ethyl acetate. Pulse chromatography experiments confirm the higher interaction strength between EA and ZIF-8 in the low-pressure range at a low degree of pore filling (Henry's region). The breakthrough profiles show development of intermediate plateaus in specific concentration ranges, with complex breakthrough evolution that has been modeled using a combined ideal and real adsorption solution theory model to accounts for deviations from ideality.
Original languageEnglish
Pages (from-to)7040-7047
Number of pages8
JournalIndustrial & Engineering Chemistry Research
Issue number20
Publication statusPublished - 23 May 2018

    Research areas

  • Zeolitic Imidazolate Frameworks, Ethyl-Acetate, Multicomponent Adsorption, Separation, Water, Stability, Equilibria, Alcohols, Recovery, Capture

ID: 39078195