99/01854 Origins of heavy oils in the Er
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Article
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1999
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Elsevier Science
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In this paper, a modtfted Knudsen effusion method was used to determine the vapou-r pressures of primary coal tars. The vapour pressure data were correlated with the molecular weight and temperature for tars from three Argonne coal samples (Pittsburgh No. 8, Upper Free-port and Wyodak) of similar mo