Research output: Contribution to journal › Article › peer-review
The dynamics of asphaltene aggregates in heavy crude oils on a nanometer scale studied via small-angle X-ray scattering in situ. / Larichev, Yu V.; Martyanov, O. N.
In: Journal of Petroleum Science and Engineering, Vol. 165, 01.06.2018, p. 575-580.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - The dynamics of asphaltene aggregates in heavy crude oils on a nanometer scale studied via small-angle X-ray scattering in situ
AU - Larichev, Yu V.
AU - Martyanov, O. N.
N1 - Publisher Copyright: © 2018 Elsevier B.V.
PY - 2018/6/1
Y1 - 2018/6/1
N2 - This work presents the results of the in situ SAXS study of the asphaltene aggregate transformations due to dilution of several heavy crude oils by heptane within the time range from 5 min to 3 days. The main growth of the asphaltene aggregates was usually observed within first minutes. The analysis of the SAXS data obtained in situ for the oils having significantly different relative content of resins showed their great influence on the dynamics of aggregates formation on a nanometer scale. In particular, it has been shown that the resins can prevent the asphaltene aggregation via certain mechanism which usually leads to the high anisotropy of the aggregates. Therefore the relative content of resin and asphaltenes as well as aromatics and aliphatics lead to the asphaltene aggregates with different shapes and different density of deposits.
AB - This work presents the results of the in situ SAXS study of the asphaltene aggregate transformations due to dilution of several heavy crude oils by heptane within the time range from 5 min to 3 days. The main growth of the asphaltene aggregates was usually observed within first minutes. The analysis of the SAXS data obtained in situ for the oils having significantly different relative content of resins showed their great influence on the dynamics of aggregates formation on a nanometer scale. In particular, it has been shown that the resins can prevent the asphaltene aggregation via certain mechanism which usually leads to the high anisotropy of the aggregates. Therefore the relative content of resin and asphaltenes as well as aromatics and aliphatics lead to the asphaltene aggregates with different shapes and different density of deposits.
KW - Aggregation
KW - Asphaltenes
KW - Heavy crude oils
KW - In-situ
KW - SAXS
UR - http://www.scopus.com/inward/record.url?scp=85042947592&partnerID=8YFLogxK
U2 - 10.1016/j.petrol.2018.02.063
DO - 10.1016/j.petrol.2018.02.063
M3 - Article
AN - SCOPUS:85042947592
VL - 165
SP - 575
EP - 580
JO - Journal of Petroleum Science and Engineering
JF - Journal of Petroleum Science and Engineering
SN - 0920-4105
ER -
ID: 10422859