Enhancement of Separated Ultra Pure n-paraffin as Phase Change Materials (PCM) by W-Fe Bimetallic Oxides

Objective: Six ultra pure Paraffin Waxes (PW) were successfully fractionated at 35°, 30°, 25°, 20°, 15° and 10°C. The bimetallic oxide (Ferberite) was successfully synthesized by Microwave assisted method. Methods: Enhanced Phase Change Materials (PCMs) were designed by loading W/Fe bimetallic oxides in the ultra pure PW matrix at 1, 2, 3, 4 and 5 wt. %. paraffin wax, W/Fe bimetallic oxide and the resultant composite blends were characterized by X-ray Diffraction (XRD), Gas Chromatography (GC), Deferential Scanning Calorimetry (DSC), Polarized Optical Microscope (POM), Scanning Electron Microscopy (SEM) and High Resolution Transmission Electron Microscopy (HRTEM). In addition to testing the thermal conductivity of the designed blends. According to SEM, DSC and POM data, the prepared nanocomposite was homogeneously dispersed into the selected PW matrix. Results: Data revealed that thermal conductivity of the designed composite increases with increasing the loading ratio of W-Fe bimetallic oxides. The total latent heat storage ΔHT of the initial sample was improved from 295.91 J/g to 311.48 J/g at 5 wt. % loading percent. Conclusion: Thermal conductivity was improved from 8.54 to 21.77 W/m2k with increasing up to 255% in comparison with pure paraffin wax.