Affinity Study of Organics on Siliceous Ferrierite Type Zeolite

Abstract

Thermal analyses were used to study the loading and the affinity of organic adsorbates on siliceous ferrierite type zeolite, which possesses perfect framework and high hydrophobic character after calcination for removing the template in the as-synthesized form. Twenty organic compounds with various functional groups, i.e., n-butane, n-pentane, n-hexane, n-heptane, methanol, ethanol, 1-propanol, 1-butanol, methylamine, ethylamine, n-propylamine, n-butylamine, formic acid, acetic acid, formaldehyde, acetaldehyde, diethyl ether, acetone, methyl formate, and ethyl formate, were investigated as the adsorbate. The AT index, defined as the value of Tdesorption − Tbp, was determined and used to compare the affinity of the organic compounds toward the zeolite. Organic molecules containing frameworkphilic functional groups such as alkylamines show high AT values. The oxygen-containing frameworkphobic functional groups such as alcohols and organic acids show lower AT values. The effect of other functional groups and...