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Time-resolved fluorescence microspectroscopy for characterizing crude oils in bulk and hydrocarbon bearing fluid inclusions.

ARAN - Access to Research at NUI Galway

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dc.contributor.author Ryder, Alan G.
dc.contributor.author Przyjalgowski, Milosz A.
dc.contributor.author Feely, Martin
dc.contributor.author Szczupak, Boguslaw
dc.contributor.author Glynn, Thomas J.
dc.date.accessioned 2012-08-22T10:41:01Z
dc.date.available 2012-08-22T10:41:01Z
dc.date.issued 2004
dc.identifier.citation A.G. Ryder, M.A. Przyjalgowski, M. Feely, B. Szczupak, and T.J Glynn (2004) 'Time-resolved fluorescence microspectroscopy for characterizing crude oils in bulk and hydrocarbon bearing fluid inclusions'. Applied Spectroscopy, 58 (9):1106-1115. en_US
dc.identifier.issn 1943-3530
dc.identifier.uri http://hdl.handle.net/10379/2929
dc.description Journal article en_US
dc.description.abstract Time-resolved fluorescence data was collected from a series of 23 bulk crude petroleum oils and six microscopic hydrocarbon-bearing fluid inclusions (HCFI). The data was collected using a diode laser fluorescence lifetime microscope (DLFLM) over the 460-700 nm spectral range using a 405 nm excitation source. The correlation between intensity averaged lifetimes (T) and chemical and physical parameters was examined with a view to developing a quantitative model for predicting the gross chemical composition of hydrocarbon liquids trapped in HCFI. It was found that T is nonlinearly correlated with the measured polar and corrected alkane concentrations and that oils can be classified on this basis. However, these correlations all show a large degree of scatter, preventing accurate quantitative prediction of gross chemical composition of the oils. Other parameters such as API gravity and asphaltene, aromatic, and sulfur concentrations do not correlate well with T measurements. Individual HCFI were analyzed using the DLFLM, and time-resolved fluorescence measurements were compared with T data from the bulk oils. This enabled the fluid within the inclusions to be classified as either low alkane/high polar or high alkane/low polar. Within the high alkane/low polar group, it was possible to clearly discriminate HCFI from different locales and to see differences in the trapped hydrocarbon fluids from a single geological source. This methodology offers an alternative method for classifying the hydrocarbon content of HCFI and observing small variations in the trapped fluid composition that is less sensitive to fluctuations in the measurement method than fluorescence intensity based methods. en_US
dc.description.sponsorship Higher Education Authority; Bank Zachodni/Allied Irish Bank (fellowship MAP); Science Foundation Ireland (Grant no. 02/IN.1/M231); Enterprise Ireland Research Innovation Fund (grant no. IF/2001/061) en_US
dc.language.iso en en_US
dc.publisher Ingenta en_US
dc.relation.ispartof Applied Spectroscopy en
dc.subject Fluorescence spectroscopy, en_US
dc.subject Petroleum, en_US
dc.subject Fluid Inclusions en_US
dc.title Time-resolved fluorescence microspectroscopy for characterizing crude oils in bulk and hydrocarbon bearing fluid inclusions. en_US
dc.type Article en_US
dc.date.updated 2012-08-17T13:43:02Z
dc.identifier.doi 10.1366/0003702041959505
dc.local.publishedsource http://dx.doi.org/10.1366/0003702041959505 en_US
dc.description.peer-reviewed peer-reviewed
dc.contributor.funder |~|Enterprise Ireland Forbairt|~|SFI|~|
dc.internal.rssid 2202600
dc.local.contact Alan Ryder, School Of Chemistry, Room 228, Arts/Science Building, Nui Galway. 2943 Email: alan.ryder@nuigalway.ie
dc.local.copyrightchecked No
dc.local.version ACCEPTED

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