Open AccessZeolites as alcohol adsorbents from aqueous solutions
Author(s) -
Blagica Cekova,
Dragi Kocev,
Elena Kolcakovska,
Daniela Stojanova
Publication year - 2006
Publication title -
acta periodica technologica/acta periodica technologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.134
H-Index - 15
eISSN - 2406-095X
pISSN - 1450-7188
DOI - 10.2298/apt0637083c
Subject(s) - adsorption , aqueous solution , acetone , chemistry , alcohol , propanol , langmuir adsorption model , volume (thermodynamics) , langmuir , inorganic chemistry , organic chemistry , ethanol , thermodynamics , physics
The potential usage of zeolites as adsorbents for the removal of organic molecules from water was investigated in a series of experiments with aqueous solutions of lower alcohols. This could represent a simple solution to the problem of cleaning up industrial wastewater as well as recovering valuable chemicals at relatively low costs. Adsorption isotherms of the Langmuir type were applied, and calculations showed that the amount of propanol adsorbed on silicalite corresponded to approximately 70% of the pore volume. The adsorption process is simple, and recovery of the more concentrated products is easily done by heat treatment and/or at lowered pressures. Adsorption experiments with aqueous acetone showed that silicalite had approximately the same adsorption capacity for acetone as for n-propanol. Heats of adsorption were determined calorimetrically