XPS direct analysis on shale rocks: Correlation with kerogen type and maturity

Donadelli, Jorge A.; Cánneva, Antonela; Erra, Georgina; Calvo, Alejandra

doi:10.1016/j.fuel.2019.116004

Cited by 29 publications

(23 citation statements)

References 29 publications

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“…But the positive peaks in gelatin disappeared. It shows the random-coil configuration. − As shown in Figure b, CMA demonstrated only a strong peak of negative ellipticity near 196 nm. It reveals a pattern characteristic of random-coil conformation.…”

Section: Results and Discussionmentioning

confidence: 92%

Construction of Unsaturated Collagen Microsphere System Based on Hydrogen/Coordination Bond and Application

Luo

Ren

2022

ACS Appl. Bio Mater.

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In this paper, unsaturated collagen microspheres (CMA-Cr/ST) were constructed from vinyl collagen (CMA, which is from leather solid waste) and chromium/synthetic tannins (Cr/ST) through hydrogen and coordination bonds and grafted on polyamide nonwoven fiber by thiol-ene click chemistry to improve the moisture absorption and permeability of nonwoven. The results showed that when the quality ratio of CMA to Cr/ST was 1:1, the magnetic stirring time was 20 min with 250 rpm at room temperature, the surface and particle size distribution of the obtained microspheres were smooth and relatively uniform, and the average particle size was 2–3 μm. When the concentrations of the microspheres and the initiators were 6 and 0.006 wt %, the irradiation time was 4 h and the grafting rate of CMA-Cr/ST on the surface of polyamide fibers would reach 31.3%. The moisture absorption and permeability of the obtained microsphere-modified polyamide nonwoven fiber (CMA-Cr/ST-S-PA) were increased. It was found that the collagen microspheres were firmly modified on the polyamide fibers by moisture and heat resistance, wash resistance, and solvent resistance studies.

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Section: Results and Discussionmentioning

confidence: 92%

Construction of Unsaturated Collagen Microsphere System Based on Hydrogen/Coordination Bond and Application

Luo

Ren

2022

ACS Appl. Bio Mater.

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“… 38 The peak at 286.3 eV belonged to C–O. 39 , 40 Also, the peaks at 289.1 eV were assigned to O–C=O forms. 41 …”

Section: Results and Analysismentioning

confidence: 99%

Study on the Effect of Pyrolysis Conditions on the Combustion Behavior and Char Structure Evolution

et al. 2022

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Pyrolysis polygeneration technology has been widely applied due to its wide adaptability to coal types and mild reaction conditions. In this paper, the in situ process test combining pyrolysis and combustion of Pingshuo coal was carried out using a thermogravimetric analyzer and a fluidized-bed reactor. The influence of pyrolysis conditions on the combustion behavior and char structure was studied. The reduction of the pyrolysis temperature and the increase in pyrolysis residence time resulted in a lower burnout temperature of char, thereby improving the combustion characteristics of char. Furthermore, the maximum CO 2 release rate reached 2.8 mg/(g·s) during the combustion process. The decrease in the pyrolysis temperature was conducive to the increase of CO 2 release mass, suggesting a more complete burning of char. The char combustion process was mainly controlled by the chemical reaction according to the reaction kinetics study. The apparent rate constant of the combustion process increased gradually with the decrease in the pyrolysis temperature of char, and the rate of the combustion reaction increased, which contributed to the enhancement of the combustion performance of the char within the range of 850–950 °C. Meanwhile, the crystal structure inside the char changed significantly after different pyrolysis conditions. However, it had little influence on the molar content of carbon structure, which suggested that the amount of CO 2 released was mainly caused by the different resistances of oxygen diffusion to the reaction interface.

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“…The sample used for experiments was an outcrop shale rock with a high total organic matter content (TOC = 9.96%) from the Vaca Muerta formation, − located in the Neuquén Basin in center-west Argentina. Vaca Muerta kerogen is of marine origin and is rich in hydrogen and was classified as type I/II according to previous studies .…”

Section: Methodsmentioning

confidence: 99%

Quantification of Imbibed Heptane in Shale Rocks Determined by Edited T₁–T₂ Nuclear Magnetic Resonance Relaxation Experiments at High Magnetic Field

Mohammadi

Delfa²,

Velasco

et al. 2022

Energy Fuels

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Typification and quantification of organic matter and fluids in shale rocks are prime topics for the characterization and geochemical evaluation of unconventional oil reservoirs. High field 1 H nuclear magnetic resonance is a fast and reliable technique that requires a small amount of sample. The acquisition of T 1 −T 2 relaxation correlation maps provide a rich variety of information, where signals arising from solid organic matter may be clearly distinguished from that of water or hydrocarbon. However, quantification is hampered due to the finite echo times used in the multipulse sequence used to determine the T 2 distribution, where even for the shortest available echo times partial relaxation is unavoidable. In this work, we apply a variation of a sequence developed for fluid typing at low fields in conventional reservoirs to shale mudstones at a high magnetic field. The addition of a Hahn echo with variable echo time applied before the T 2 determination renders a data set from which extrapolation to time zero is more accurate than with previous methods. We applied this sequence to a sample saturated with a varying degree of heptane and compare our results with gravimetric ones. Furthermore, the evaporation kinetics show a change from a funicular to a pendular regime when the amount of heptane evaporating from inorganic pores reaches a critical level.

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XPS direct analysis on shale rocks: Correlation with kerogen type and maturity

Cited by 29 publications

References 29 publications

Construction of Unsaturated Collagen Microsphere System Based on Hydrogen/Coordination Bond and Application

Construction of Unsaturated Collagen Microsphere System Based on Hydrogen/Coordination Bond and Application

Study on the Effect of Pyrolysis Conditions on the Combustion Behavior and Char Structure Evolution

Quantification of Imbibed Heptane in Shale Rocks Determined by Edited T₁–T₂ Nuclear Magnetic Resonance Relaxation Experiments at High Magnetic Field

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XPS direct analysis on shale rocks: Correlation with kerogen type and maturity

Cited by 29 publications

References 29 publications

Construction of Unsaturated Collagen Microsphere System Based on Hydrogen/Coordination Bond and Application

Construction of Unsaturated Collagen Microsphere System Based on Hydrogen/Coordination Bond and Application

Study on the Effect of Pyrolysis Conditions on the Combustion Behavior and Char Structure Evolution

Quantification of Imbibed Heptane in Shale Rocks Determined by Edited T1–T2 Nuclear Magnetic Resonance Relaxation Experiments at High Magnetic Field

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Quantification of Imbibed Heptane in Shale Rocks Determined by Edited T₁–T₂ Nuclear Magnetic Resonance Relaxation Experiments at High Magnetic Field