Synthesis and Characterization Nanosilica from Geothermal Waste by Wet Grinding Method as an Enhanced Oil Recovery (EOR)

Abstract

In this study, nanosilica for Enhanced Oil Recovey (EOR) has been successfully synthesized using geothermal waste. The method used is wet grinding method with deposition time variations to determine its effect on time deposition on particle size. Characterization using X-Ray Fluoroscene (XRF), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) were also carried out to determine the characteristics of the material. Wettability of nanosilica then was confirmed by contact angle test. Based on the results, it was shown that the purified silica has silica content up to 98.85% with an amorphous phase. The results of Particle Size Analyzer (PSA) show that deposition time determines nanoparticles size. The longer time deposition, the smaller particles can be produced with the best result at 4 days deposition because it can produced the smallest particle at 71.5 nm. The morphology of nanosilica is granular that has been confirmed by SEM. Contact angle test reveals that nanosilica geothermal waste has ability to change wettability. Nanosilica can decrease contact angel of crude oil from 23,3o to 13,9o.