Reactivity and stability of vacuum residual oils in their thermal conversion

Dependence of visbroken residue viscosity and vacuum residue conversion in a commercial visbreaker unit on feedstock quality

“…SARA analysis was performed following the procedure described in [6]. Analysis of residual oil colloidal stability expressed by S-value (intrinsic stability), Sa (peptizability or ability of the asphaltenes to remain in colloidal dispersion), and So (peptizing power of oil is the "aromatic" equivalent of the oil) was performed in accordance with a modification to ASTM D 7157-05 as described in [7]. Table 2 summarizes the physical and chemical properties of the residual oils under study.…”

Investigation on sediment formation in residue thermal conversion based processes

“…The properties were measured according to ASTM standards: ASTM D-2007 for SARA (Saturates, Aromatics, Resins (Polars), and Asphaltenes) analysis; АSTM D-1298 for density; ASTM D-189 for Conradson carbon. The residual oil stability was measured by a modified ASTM D 7157-05 [38]. Sediment content of the unconverted liquid product was measured by IP-375 procedure.…”

Characterization of fast-pyrolysis bio-oil distillation residues and their potential applications

“…One reason for the consistent difference relates to the presence of heteroatoms O and N. Traditional bio-oil distillate bottoms contain higher concentrations of oxygen, which interferes with combustion efficiency by excessive gas formation, particularly CO. Although petroleum residues contain problematic heteroatoms like sulfur and Ni/V metals [22], they possess lower C:H ratios due to their abundance of paraffinic-type compounds [23]. Fig.…”