Green and Facile Synthesis of Metal Organic Framework Cu BTC Supported Sn (II) Substituted Keggin Heteropoly Composites as an Esterification Nanocatalyst for Biodiesel Production
In the present study, metal organic framework Cu BTC supported Sn (II) substituted Keggin heteropoly nanocomposite (Sn1.5PW/Cu BTC) was successfully prepared by a simple impregnation method and applied as a novel nanocatalyst for producing biodiesel from oleic acid (OA) through esterification. The nanocatalyst was characterized by Fourier transform infrared spectrometry (FTIR) wide angle X ray diffraction (XRD) scanning electron microscopy (SEM) transmission electron microscopy (TEM) nitrogen adsorption desorption, thermogravimetrics (TG) and NH3 temperature programmed desorption (NH3 TPD) Accordingly, the synthesized nanocatalyst with a Sn1.5PW/Cu BTC weight ratio of 1 exhibited a relatively large specific surface area, appropriate pore size, and high acidity. Moreover, an OA conversion of 87.7% was achieved under optimum reaction conditions. The nanocatalyst was reused seven times, and the OA conversion remained at more than 80% after three uses. Kinetic study showed that the esterification reaction followed first order kinetics, and the activation energy (Ea) was calculated to be 38.3 kJ/mol.
Frontiers in Chemistry