Solvent swelling of Dictyonema oil shale: Low temperature heat-treatment caused changes in swelling extent

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• 作者：Kristel Kilk ; Natalja Savest ; Aleksei Yanchilin ; Diane S. Kellogg ; Vahur Oja
• 关键词：Dictyonema oil shale ; Black shale ; Solvent swelling ; Pyrolysis ; Cross-linking
• 刊名：Journal of Analytical and Applied Pyrolysis
• 出版年：2010
• 出版时间：November 2010
• 年：2010
• 卷：89
• 期：2
• 页码：261-264
• 全文大小：193 K

文摘

Equilibrium swelling experiments were used to gain insight into the structural changes of Dictyonema oil shale kerogen (baltoscandian basin black shale kerogen) during low-temperature heating. Room temperature volumetric swelling was measured for samples previously thermally pre-treated at different temperatures under an inert gas environment. The swelling capacity for heat-treated Dictyonema oil shale decreases with increasing pre-treatment temperature from about 150 °C to 380 °C, suggesting that cross-linking reactions occur during low-temperature heat treatment in the pre-pyrolysis temperature region. This behavior is consistent with that observed in non-softening low-tar yield coals.