The Effect of Regeneration Time of Biomass Activated Carbon using Low Temperature to Reduce Filtration Loss in Water-based Drilling Fluid

: Activated Carbon (AC) is a material that has porous structure and high surface area. If Activated Carbon has long been opened to the air and interacts to the air, The surface of activated carbon can bind molecules from the liquid or gas phases by van der waals force. It can affect decreasing the ability of activated carbon to reduce filtration loss in water-based drilling fluid. The research has been carried out to increase the effectiveness of AC as an additive in drilling process by thermal regeneration of activated carbon using low temperature. This research using several samples that have various regeneration time by heated at 200 ◦ C. The regeneration times are for 0 minute (AC non- regeneration process), 30 minutes, 60 minutes, 90 minutes, and 120 minutes. Scanning Electron Microscope (SEM) shows the surface morphology and porous size of the sample. The results show that filtration loss decrease with addition time respectively 15 ml, 13.7 ml, 13.1 ml, 12.6 ml, and 12.1 ml. Regeneration process of activated carbon is one of the ways to reuse damaged activated carbon that can control filtration loss until 12.1 ml.