TY - JOUR
T1 - Chemical characterization of asphaltenes from various crude oils
AU - Leyva, Carolina
AU - Ancheyta, Jorge
AU - Berrueco, César
AU - Millán, Marcos
PY - 2013/2
Y1 - 2013/2
N2 - The characterization of asphaltenes recovered from different crude oils is reported in the present work. The properties of the crude oils cover a wide range (API gravity: 10-33°, asphaltene content: 1.7-25.1 wt.%). Asphaltenes were precipitated in a high pressure batch reactor using n-heptane as solvent. Metal content by atomic absorption, elemental analysis, UV-fluorescence spectroscopy and molecular weight distribution by size exclusion chromatography were used as characterization techniques. The content of asphaltenic nickel, vanadium and sulfur was calculated for each crude oil. It was found that the concentration of these three species was higher in heavier crude oils. Heavier crudes also showed significantly higher asphaltene contents, which represented important fractions of the vacuum residue produced from these oils. However, the differences in asphaltene molecular weight distributions were narrower and did not show a clear trend as a function of the origin of the sample.
AB - The characterization of asphaltenes recovered from different crude oils is reported in the present work. The properties of the crude oils cover a wide range (API gravity: 10-33°, asphaltene content: 1.7-25.1 wt.%). Asphaltenes were precipitated in a high pressure batch reactor using n-heptane as solvent. Metal content by atomic absorption, elemental analysis, UV-fluorescence spectroscopy and molecular weight distribution by size exclusion chromatography were used as characterization techniques. The content of asphaltenic nickel, vanadium and sulfur was calculated for each crude oil. It was found that the concentration of these three species was higher in heavier crude oils. Heavier crudes also showed significantly higher asphaltene contents, which represented important fractions of the vacuum residue produced from these oils. However, the differences in asphaltene molecular weight distributions were narrower and did not show a clear trend as a function of the origin of the sample.
KW - Asphaltene characterization
KW - Molecular weight distribution
UR - http://www.scopus.com/inward/record.url?scp=84870564044&partnerID=8YFLogxK
U2 - 10.1016/j.fuproc.2012.10.009
DO - 10.1016/j.fuproc.2012.10.009
M3 - Artículo
SN - 0378-3820
VL - 106
SP - 734
EP - 738
JO - Fuel Processing Technology
JF - Fuel Processing Technology
ER -