Use of the PORLA Automatic Heavy Fuel/Residual Oil Stability Analyzer for the Monitoring of H-Oil Plants

摘要

The H-Oil process is a commercial ebullated-bed licensed by IFP. It is used to convert typically 50 to 75 percent of the vacuum residue in the feedstock into distillates. The production of a stable, high quality heavy fuel oil with a high distillates. The production of a stable, high quality heavy fuel oil with a high conversion level is a difficult challenge. The stability (Floculation Ratio FR) and the compatibility (Peptizing state of asphaltenes P-Value) of residual H-Oil fuels are the key parameters. The analytical test is based on the addition of a paraffinic solvent (iso-octane) to heavy oil/aromatic solvent (xylene) mixtures of variable proportion until asphaltenes precipitate. FR and P-Value are calculated from the consumption of iso-octane at the flocculation. A simplified method used for the monitoring of pilot plants is based on the measureing of FR at a given solvent (aromatic/paraffinic) to oil ratio, typically 5/1.