2019
DOI: 10.1021/acs.energyfuels.9b02518
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Nanoscale Molecular Fractionation of Organic Matter within Unconventional Petroleum Source Beds

Abstract: Fractionation of petroleum during migration through sedimentary rock matrices has been observed across lengths of meters to kilometers. Selective adsorption of specific chemical moieties at mineral surfaces and/or the phase behavior of petroleum during pressure changes typically are invoked to explain this behavior. Such phenomena are of interest as they impact both the quality and recoverability of petroleum resources. Given the current emphasis on unconventional (continuous) resources, there is a need to und… Show more

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Cited by 26 publications
(26 citation statements)
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References 50 publications
(81 reference statements)
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“…The advanced fractionation and optimized biomass processing should be developed by taking advantage of the natural variability to effectively separate bulk materials into distinct fractions for utilization. The fractionation approach has been established and used in the grain milling and petroleum industries to obtain a variety of unique and high value fractions to meet the consumer and market needs. , Selective harvesting, mechanical separation, and fractional milling could be effective ways in the biomass industry to sort and separate biomass fractions and tissues on the basis of their distinct properties such as size, shape, color, and gravity and require further investigation and development. ,,,, …”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The advanced fractionation and optimized biomass processing should be developed by taking advantage of the natural variability to effectively separate bulk materials into distinct fractions for utilization. The fractionation approach has been established and used in the grain milling and petroleum industries to obtain a variety of unique and high value fractions to meet the consumer and market needs. , Selective harvesting, mechanical separation, and fractional milling could be effective ways in the biomass industry to sort and separate biomass fractions and tissues on the basis of their distinct properties such as size, shape, color, and gravity and require further investigation and development. ,,,, …”
Section: Resultsmentioning
confidence: 99%
“…The fractionation approach has been established and used in the grain milling and petroleum industries to obtain a variety of unique and high value fractions to meet the consumer and market needs. 44,45 Selective harvesting, mechanical separation, and fractional milling could be effective ways in the biomass industry to sort and separate biomass fractions and tissues on the basis of their distinct properties such as size, shape, color, and gravity and require further investigation and development. 1,3,8,16,46 The process of storage and biological degradation could be beneficial if harnessed to improve the fractionation and conversion of biomass to fuels and chemicals.…”
Section: ■ Materials and Methodsmentioning
confidence: 99%
“…Chromatography, mass spectrometry, and infrared (IR) spectroscopy are commonly used in the detection of trace organic compounds. Since the content of OM is much lower than that of complex substrate, the OM usually needs to be extracted, purified, and enriched before the sample is measured by the above techniques in order to reduce the interference of the organic components by the substrate. These technologies can accurately detect organic compounds. This study proposes another optical method that is suitable for detecting trace OM in the petroleum industry and can analyze the differences in the content and type of trace OM.…”
Section: Introductionmentioning
confidence: 99%
“…AFM-IR measurements were collected using an Anasys NanoIR2 instrument at the University of Delaware Advanced Materials Characterization Laboratory (https://sites.udel.edu/amcl/), in a manner similar to a previous study from our laboratory. 11 Briefly, the AFM-IR instrument was equipped with a quantum cascade laser (QCL, Daylight Solutions, MIRcat-2400) with a typical 480 ns pulse length and 210 kHz repetition rate. Prior to signal acquisition the excitation laser was optimized (alignment of laser beam with AFM tip) at three to five frequencies across the scanned frequency range.…”
Section: Introductionmentioning
confidence: 99%
“…16 Here we adopt a conservative estimate of ∼50 nm as the upper-limit spatial resolution for an individual AFM-IR measurement. 11 Finally, it is difficult to directly relate AFM-IR signal strength to an absolute concentration of chemical moieties within the sample probe volume as the intensity of the detected signal is proportional to the product of the incident laser power, overlap between the input infrared laser frequencies and the molecular vibration frequencies of the sample, the stiffness of the sample material (i.e., the degree to which it can swell following absorption of an infrared photon), and the number density of molecular oscillators within the probe volume. 16 As such, it is important to state that only relative abundance or relative concentrations of chemical groups are extractable from the displayed AFM-IR spectra and maps.…”
Section: Introductionmentioning
confidence: 99%