Приказ основних података о документу

dc.creatorPremovic, PI
dc.creatorTonsa, IR
dc.creatorDordevic, DM
dc.creatorPavlović, Mirjana S.
dc.date.accessioned2018-03-01T18:49:27Z
dc.date.available2018-03-01T18:49:27Z
dc.date.issued2000
dc.identifier.issn0352-5139 (print)
dc.identifier.urihttp://vinar.vin.bg.ac.rs/123456789/2327
dc.description.abstractThe thermal behavior of vanadyl porphyrins was studied by electron spin resonance during heating of kerogens, isolated from the La Luna (Venezuela) anti Serpiano (Switzerland) bituminous rocks, at 250 degrees C for 1 to 20 days in the presence of air. During the thermal treatment of the kerogens, the vanadyl porphyrins resonance signals decrease monotonically and become quite small after 6 days of heating. Concomitantly, new vanadyl signals appear and, at longer heating limes, dominate the spectrum. It is suggested that the secondary vanadyl species must have been formed from vanadyl porphyrins. Similar conversions of vanadyl porphyrins are observed under the same experimental conditions for asphaltenes extracted from the La Luna and Serpiano rocks, and floating asphalt from the Dead Sea (Israel). A comparison of the spin-Hamiltonian parameters for vanadyl porphyrins and the vanadyl compounds obtained during pyrolysis of the kerogens/asphaltenes suggests that the latter are of a non-porphyrin type. For comparison a study was conducted on Western Kentucky No. 9 coal enriched with vanadium ( GT 400 ppm) from six mines. AII the coal sam!,les:show only the presence of predominant by non-porphyrin vanadyl compounds, similar to those generated through laboratory heating of the kerogens/asphaltenes in ail: In addition, some samples also contain a minor amount of vanadyl porphyrins.en
dc.rightsopenAccessen
dc.sourceJournal of the Serbian Chemical Societyen
dc.subjectvanadyl porphyrinsen
dc.subjectkerogenen
dc.subjectasphalteneen
dc.subjectincorporationen
dc.subjectelectron spin resonanceen
dc.titleAir oxidation of the kerogen/asphaltene vanadyl porphyrins: an electron spin resonance studyen
dc.typearticleen
dcterms.abstractПремовиц, ПИ; Тонса, ИР; Дордевиц, ДМ; Павловиц, МС;
dc.citation.volume65
dc.citation.issue2
dc.citation.spage113
dc.citation.epage121
dc.identifier.wos000085721500005
dc.citation.rankM23


Документи

ДатотекеВеличинаФорматПреглед

Нема фајлова за овај рад.

Овај рад се појављује у следећим колекцијама

Приказ основних података о документу