TY - JOUR
T1 - Precipitation, fractionation and characterization of asphaltenes from heavy and light crude oils
AU - Trejo, F.
AU - Centeno, G.
AU - Ancheyta, J.
N1 - Funding Information:
The authors thank Instituto Mexicano del Petróleo for its financial support. F. Trejo also thanks CONACyT for financial support.
PY - 2004/11
Y1 - 2004/11
N2 - Asphaltenes of Maya and Isthmus crude oils were precipitated, fractionated and characterized in this work. Isolation of asphaltenes was performed by following the ASTM D3279 method, which uses n-heptane for solvent precipitation. Asphaltenes were separated into three fractions by Soxhlet extraction with a binary solvent system of toluene and n-heptane. C, H, O, N, S, and Ni and V contents were determined in asphaltenes and in their fractions by elemental analysis and atomic absorption, respectively. VPO aggregate weight and NMR measurements were also performed in all samples. Important differences in properties of unfractionated asphaltenes and asphaltenes fractions were observed. Some of these differences were attributed to impurities in the unfractionated asphaltenes.
AB - Asphaltenes of Maya and Isthmus crude oils were precipitated, fractionated and characterized in this work. Isolation of asphaltenes was performed by following the ASTM D3279 method, which uses n-heptane for solvent precipitation. Asphaltenes were separated into three fractions by Soxhlet extraction with a binary solvent system of toluene and n-heptane. C, H, O, N, S, and Ni and V contents were determined in asphaltenes and in their fractions by elemental analysis and atomic absorption, respectively. VPO aggregate weight and NMR measurements were also performed in all samples. Important differences in properties of unfractionated asphaltenes and asphaltenes fractions were observed. Some of these differences were attributed to impurities in the unfractionated asphaltenes.
UR - http://www.scopus.com/inward/record.url?scp=3442892731&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2004.06.008
DO - 10.1016/j.fuel.2004.06.008
M3 - Artículo
SN - 0016-2361
VL - 83
SP - 2169
EP - 2175
JO - Fuel
JF - Fuel
IS - 16
ER -