Probing Flocculant-Induced Asphaltene Precipitation via NMR Imaging: from Model Toluene-Asphaltene Systems to Natural Crude Oils | Sciact - CRIS-system of Boreskov Institute of Catalysis

Probing Flocculant-Induced Asphaltene Precipitation via NMR Imaging: from Model Toluene-Asphaltene Systems to Natural Crude Oils Full article

Journal

Applied Magnetic Resonance
ISSN: 0937-9347 , E-ISSN: 1613-7507

Output data

Year: 2016, Volume: 47, Number: 2, Pages: 223-235 Pages count : 13 DOI: 10.1007/s00723-015-0741-9

Tags

Flocculation; Image processing; Magnetic resonance imaging; Nuclear magnetic resonance; Precipitation (chemical); Suspended sediments; Suspensions (fluids); Toluene

Authors

Morozov E.V. ^1,2,3 , Martyanov O.N. ^3,4

Affiliations

1	Institute of Chemistry and Chemical Technology, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk 660036, Russia
2	Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk 660036, Russia
3	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Ak. Lavrentieva 5, Novosibirsk 630090, Russia
4	Novosibirsk State University, Pirogova st. 2, Novosibirsk 630090, Russia

Funding (1)

Russian Science Foundation

15-19-00119

An nuclear magnetic resonance (NMR) imaging approach for studying flocculant-induced asphaltene precipitation processes is introduced in this report. Unlike commonly accepted techniques, which primarily measure aggregation processes on the submicron scale (the level of asphaltene molecules and their aggregates), NMR imaging demonstrates the capability to obtain new useful information about bulk system behavior on the macro scale. To reveal the capabilities of the method, the model toluene-asphaltene system and two samples of natural crude oils with different chemical composition and physical properties (such as asphaltene content and density) were employed for experiments. The process of colloidal suspension formation and two different patterns of its evolution were observed depending on both the asphaltene content and the flocculant concentration. In the first pattern, the flocculant-induced precipitation leads to the slow uniform compacting of the suspension and descent of the sedimentation front, whereas the second pattern is characterized by sediment accumulation and the upwards drift of the front. It was found that the behavior of the precipitated asphaltenes in the model system correlates well with those observed in natural crude oils. The results achieved in this work are in agreement with the data obtained previously via other techniques. Thus, NMR imaging proved to be an efficient method for probing flocculant-induced precipitation in crude oils.

Morozov E.V. , Martyanov O.N.
Probing Flocculant-Induced Asphaltene Precipitation via NMR Imaging: from Model Toluene-Asphaltene Systems to Natural Crude Oils
Applied Magnetic Resonance. 2016. V.47. N2. P.223-235. DOI: 10.1007/s00723-015-0741-9 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Sep 14, 2015
Published online:	Nov 18, 2015
Published print:	Feb 1, 2016

Web of science:	WOS:000368708800009
Scopus:	2-s2.0-84955631883
Elibrary:	26857041
Chemical Abstracts:	2015:1873511
Chemical Abstracts (print):	165:178625
OpenAlex:	W2254392084

DB	Citing
Web of science	20
Scopus	19
Elibrary	25
OpenAlex	20