Abstract
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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
