Bound carboxylic acids in the Alberta oil sands |
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| Authors: | TD Cyr OP Strausz |
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| Institution: | Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2 |
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| Abstract: | The Alberta oil sands contain 1–2% organic solvent insoluble organic matter chemisorbed to the inorganic matrix. Analysis of the monocarboxylic fraction (1–14%) of the chemisorbed material has revealed the presence of C12–C32 normal, iso, anteiso alkenoic acids, mono and diunsaturated acids, cyclopropylalkanoic and cyclic terpenoid carboxylic acids. Some of the main components of the acyclic acids were similar to those which have been identified in various petroleums and Alberta oil sand bitumens (in small concentrations) by Mackenzie et al. (Advances in Organic Geochemistry 1981, pp 637–649, Wiley/Heyden, 1983), and attributed to bacterial degradation of the oils via the aerobic pathway of biosynthesis.The presence of these acids in the chemisorbed fraction and virtual absence in the bitumen lends additional support to earlier proposals that the Alberta oil sand bitumens have undergone severe microbial degradation. |
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