Geosynthesis of dibenzothiophene and alkyl dibenzothiophenes in crude oils and sediments by carbon catalysis |
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Authors: | Muhammad Asif Robert Alexander Tahira Fazeelat Kieran Pierce |
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Institution: | 1. Chemistry Department, University of Engineering and Technology, GT Road, Lahore, Pakistan;2. Chemistry Department, Curtin University of Technology, GPO Box U1987, Perth WA 6845, Australia |
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Abstract: | Sediment extracts and crude oils have been shown to contain methyl substituted biphenyls and dibenzothiophenes, with isomer distributions suggesting a geochemical relationship between the two compound classes. Laboratory simulation experiments have shown that carbon catalyses the reaction between surface adsorbed sulfur and biphenyl to form dibenzothiophene. Similarly, the methyl substituted biphenyls reacted to yield corresponding methyl dibenzothiophenes. We suggest that the widespread distribution of dibenzothiophene and alkylated dibenzothiophenes in sediments and crude oils is the result of a catalytic reaction of biphenyl ring systems and surface-adsorbed sulfur on the surface of carbonaceous material. |
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