Storage stability of visbroken residual fuel oils: Compositional studies

Abstract Storage stability, at ambient conditions, of visbroken residues (150 °C + ) obtained at different severity conditions were studied in terms of sediment yield and viscosity. The effect of storage time, conversion levels (severities) and composition of residues on these parameters are reported. The reactions leading to formation of sediments are found to be more pronounced after about one year of storage of the visbroken residues (150 °C + ) obtained at the severities studied.