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Estimation of vanadyl porphyrin concentration in sedimentary kerogens and asphaltenes
dc.creator | Premović, Pavle I. | |
dc.creator | Allard, T | |
dc.creator | Nikolic, ND | |
dc.creator | Tonsa, Ivana R. | |
dc.creator | Pavlović, Mirjana S. | |
dc.date.accessioned | 2018-03-01T18:50:25Z | |
dc.date.available | 2018-03-01T18:50:25Z | |
dc.date.issued | 2000 | |
dc.identifier.issn | 0016-2361 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/2338 | |
dc.description.abstract | We describe a new, rapid method for determining the concentration of vanadyl porphyrins (VO2+-P) associated with the kerogen of bituminous sedimentary rocks using electron spin resonance (ESR). The method is simple, straightforward and inexpensive. Several concentrations of a vanadyl (VO2+) standard dissolved in glycerol-lignite mixture were prepared. The VO2+ concentrations ranged from 100 to 1000 ppm. The anisotropic ESR spectra of both the standards and kerogen samples were recorded at room temperature and the integrated areas of the pre-selected ESR line (attributed to nuclear spin m(t) = -5/2) were computed. The concentrations of VO2+ found in the kerogen samples were calculated using the relative ratio of the integrated areas for the standards and the kerogen samples. The VO2+-P concentrations of the kerogen materials were then calculated using 350 as the mean molecular weight of these species. Quantitative determination of VO2+-P in the kerogen fractions in the range of 800-8000 ppm and higher is feasible by the method reported. The method of analysis was also extended to the asphaltene samples (enriched with VO2+-P) and a coal sample containing non-porphyrin VO2+ associated with its organic fraction. (C) 2000 Elsevier Science Ltd. All rights reserved. | en |
dc.rights | restrictedAccess | en |
dc.source | Fuel | en |
dc.subject | vanadyl porphyrins | en |
dc.subject | kerogen | en |
dc.subject | estimation | en |
dc.subject | concentration | en |
dc.title | Estimation of vanadyl porphyrin concentration in sedimentary kerogens and asphaltenes | en |
dc.type | article | en |
dcterms.abstract | Aллард, Т; Николиц, НД; Тонса, ИР; Павловиц, МС; Премовиц, ПИ; | |
dc.citation.volume | 79 | |
dc.citation.issue | 7 | |
dc.citation.spage | 813 | |
dc.citation.epage | 819 | |
dc.identifier.wos | 000086311100011 | |
dc.identifier.doi | 10.1016/S0016-2361(99)00205-7 | |
dc.citation.rank | M21 | |
dc.identifier.scopus | 2-s2.0-0342758526 |
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