Oxidative profiles of some australian oil shales by thermal analysis and infrared spectroscopy

Levy, John H.; Stuart, W.I.

doi:10.1016/0040-6031(84)80023-4

Cited by 28 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3). It is seen that almost all of the samples have similar kerogen bands from FTIR spectra as stated in other studies (Alstadt, Katti, & Katti, 2012;Levy & Stuart, 1984;Rouxhet, Robin, & Nicaise, 1980). Between 3570 and 3200 cm -1 a hydroxy group, H-bonded OH stretch can be seen as a broad band in some of the samples (Coates & Ed, 2000).…”

Section: Resultssupporting

confidence: 73%

See 1 more Smart Citation

Comprehensive Spectral and Thermal Characterization of Oil Shales

Guven

Akın

Hasçakir

2015

SPE Middle East Unconventional Resources Conference and Exhibition

View full text Add to dashboard Cite

The heterogeneous nature of oil shale resources associated to the depositional environments, lithology, and organic content make the reserve estimation complex and unpredictable. However, comprehensive laboratory studies on organic rich shale samples collected from different regions can increase the understanding about the organic content of oil shales, interaction of shale with organic matter and injected fluid used during enhanced oil recovery method. This study investigates the characterization of eight different Turkish and American oil shale samples with several spectral methods and a thermal analysis. The main purpose of this study is to characterize the oil shale samples to increase the understanding about the organic content and interaction of shale with organic matter.In this study, we used Thermal Gravimetric Analysis/Differential Scanning Calorimetry (TGA/DSC) analysis to estimate organic content of each oil shale sample in air and nitrogen environments. X-Ray Diffraction (XRD) was used to define minerals in oil shale. Fourier Transform Infrared Spectroscopy (FTIR) was used to detect the mineral and kerogen in oil shale before and after the TGA/DSC analysis. Scanning Electron Microscope (SEM) was used to characterize the depositional environment of each oil shale samples. TGA/DSC results verified that oil shale samples have up to 50% of organic matter. XRD and FTIR results helped to identify the organic and inorganic compounds. Effects of minerals and ions were recognized by comparing TGA/DSC curves and FTIR spectra. It was recognized that the more carbonate ion in the oil shale the more increase in weight loss occurred. Diatoms identified from SEM results showed that depositional environments of the some oil shale samples are marine environments.This study provides insight for the reserve estimation of the eight different oil shale samples with comprehensive spectral and thermal characterization.

show abstract

Section: Resultssupporting

confidence: 73%

“…The oil shale samples that have high carbonate ion show high weight loss above 600°C (Levy & Stuart, 1984). Hatildag, Ulukisla, Seyitomer, Eagle Ford, and Green River oil shale samples have distinctive peaks between 600 and 800°C, indicating that the weight loss in this period is due to the calcite and dolomite decomposition (See Fig.…”

Section: Resultsmentioning

confidence: 96%

Comprehensive Spectral and Thermal Characterization of Oil Shales

Guven

Akın

Hasçakir

2015

SPE Middle East Unconventional Resources Conference and Exhibition

View full text Add to dashboard Cite

show abstract

“…Though pure kerogen shows a 70% weight (Fig. 1b) by 450 ºC, we cannot see such a weight reduction for raw oil shale sample because of the influence of host material in the pyrolysis matrix [9,20]. Figure 8 clearly shows that the Tp of dawsonite and nahcolite has moved from 359 ºC to 381 ºC and from 158 ºC to 161 ºC, respectively, by increasing the partial pressure of CO 2 from 0% to 100%.…”

Section: Resultsmentioning

confidence: 92%

Thermal Behavior of Raw Oil Shale and Its Components

Palayangoda¹,

Nguyen²

2015

Oil Shale

View full text Add to dashboard Cite

In this study, the thermal behavior of dawsonite, nahcolite, quartz, dolomite, albite, illite, analcime, kerogen and raw oil shale samples is discussed. Thermal Gravimetric Analysis (TGA), Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Differential Scanning Calorimetry (DSC) were used to study the thermal properties of the samples. The DSC dynamic experiments were performed in CO 2 and N 2 atmospheres. The influence of purge gases on the thermal decomposition of kerogen, dawsonite and nahcolite was investigated. In the DSC experiments, the heating rate did not change the decomposition mechanism of both dawsonite and nahcolite and the Tp (the sample temperature at which the maximum deflection in the DSC curve is recorded) of dawsonite and nahcolite could be moved to higher temperatures by purging CO 2 .

show abstract

“…These are subsequently evolved as water and carbon dioxide during pyrolysis rather than the hydrocarbons which would have been produced in the absence of such cross-linking. Other studies on the effects of weathering, direct oxidation, aging, and storage have all tended to support the theory that there is a decrease in the quality and quantity of the oil as a result of the interaction of the organic moieties in the shale/kerogen samples with oxygen either at ambient or at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…All of the above-mentioned studies involved the use of the raw shale or the kerogen. In addition to the use of FTIR spectroscopy, − , other analytical techniques utilized in these studies varied from TG-DTG (thermogravimetric−derivative thermogravimetric) analysis, TGA/MS (thermogravimetric analysis/mass spectrometry), HPMD (high-pressure microdilatometry), stable carbon isotope (δ 13 C) analysis, and NMR (nuclear magnetic resonance). ,, Apart from the work by Yurum et al, who used demineralized shale, and to a lesser extent Earnest, who used mineral matter indigenous to the shale, not much has been done on the effect of mineral matter on the products of the oxidation of shale. In a previous paper, we have shown how FTIR emission spectroscopy can be used to study the thermal transformations of shales and kerogen .…”

Section: Introductionmentioning

confidence: 99%

Study of the Oxidation of Oil Shale and Kerogen by Fourier Transform Infrared Emission Spectroscopy

1998

View full text Add to dashboard Cite

Infrared emission spectroscopy has been used to monitor the chemical modifications taking place during the oxidation of bitumen-free Kerosene Creek shale, the bitumen-carbonate-free shale, and the bitumen-carbonate-silicate-free shale (kerogen). The samples were heated, in air, at temperatures in the range 50-700 °C at intervals of 50 °C. Oxidation of the samples at increasing temperatures showed a steady decrease in the signals due to aliphatic hydrocarbons (3000 cm -1 to 2700, 1460, and 1375 cm -1 ) as well as in the carbonyl/carboxyl signals (∼1710 cm -1 ) and the carbonyl signal at 1740 cm -1 , along with an increase in the anhydride signals at 1775 cm -1 and at ∼1850 cm -1 . Constant temperature (300 °C) oxidation produced a steady increase in the anhydride peaks at ∼1775 cm -1 and at ∼1850 cm -1 while the 1710 and 1740 cm -1 peaks slowly decreased. Of the mineral bands, those characteristic of carbonates totally disappeared at 700 °C while the other bands remained. The rate of decomposition of organic functionalities is generally fastest for the bitumen-carbonate-free sample. Analysis of the kinetic data clearly showed that the presence of carbonates and silicates lowered the activation energy for the oxidation of aliphatic C-H groups.

show abstract

Oxidative profiles of some australian oil shales by thermal analysis and infrared spectroscopy

Cited by 28 publications

References 4 publications

Comprehensive Spectral and Thermal Characterization of Oil Shales

Comprehensive Spectral and Thermal Characterization of Oil Shales

Thermal Behavior of Raw Oil Shale and Its Components

Study of the Oxidation of Oil Shale and Kerogen by Fourier Transform Infrared Emission Spectroscopy

Contact Info

Product

Resources

About