| 초록 |
One of the exceptional challenge in crude oil extraction and refining is the formation of highly toxic and intractable petroleum emulsions. Herein, a simultaneous demulsification and recovery of upgraded oil that is trapped in the petroleum emulsions is investigated using supercritical water (scH2O). Various operational parameters including temperatures (350-400 oC), pressures (25.0-35 MPa), emulsion concentrations (10-100 wt%) and reaction times (30-120 min) are explored to find an optimized condition; at 400 oC and 60 min, the upgraded oil exhibits very low total acid number of 2.8 mg-KOH/g-oil (30 MPa) and contains a low asphaltene content of 4.1 area% (25 MPa), while the upgraded oil is enriched with linear/branched hydrocarbons with low amount of non-distillable residue fraction of 13 wt% at 400 oC for 90 min, indicating effective cracking of the high-molecular-weight and interfacially active species into their corresponding non-interfacial active species. |
