Analysis, occurrence, and reactions of dawsonite in AMSO well CH-1

•The paper compares three independent methods for dawsonite analysis in oil shale.•Results are presented as a function of depth in a region of the Green River Formation where little nahcolite is present.•The decomposition reactions of dawsonite are very sensitive to pressure during pyrolysis. The ab...

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Bibliographic Details
Published inFuel (Guildford) Vol. 144; pp. 259 - 263
Main Authors Burnham, Alan K., Levchenko, Andre, Herron, Michael M.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.03.2015
Subjects
Dawsonite analysis
Dawsonite decomposition
Green River Formation
Oil shale
Saline Zone
Saline Zone
Dawsonite analysis
Green River Formation
Oil shale
Dawsonite decomposition
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Summary:•The paper compares three independent methods for dawsonite analysis in oil shale.•Results are presented as a function of depth in a region of the Green River Formation where little nahcolite is present.•The decomposition reactions of dawsonite are very sensitive to pressure during pyrolysis. The abundance of dawsonite in an exploration well in the Green River Formation oil shale has been characterized by well logging, FTIR, DSC, and wet chemistry. The four methods agree qualitatively but not quantitatively. Thermal analysis was then used to characterize changes in the dawsonite decomposition endotherm as a function of pressure. The peak temperature of the endotherm increased with pressure and the size decreased with pressure. The total endotherm at high temperature that includes dolomite and calcite reactions decreased with increased pressure, presumably due to formation of more stable silicates.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2014.12.018