Abstract
Static, nitrogen, and steam sweep pyrolysis, and co-pyrolysis of oil shale and Seyitömer lignite were studied. A modified Heinze type retort with a 40 g sample capacity was used. Pyrolysis runs were started at room temperature; samples were heated at a rate of 4°C/min up to 550°C, and held for 30 min at this temperature. Both nitrogen and water sweep improved the oil yield considerably compared to static pyrolysis. Steam had a greater effect on oil yield. The changes in oil structure were similar for nitrogen and steam: increases in sweep velocity caused increases in aliphatics and aromatics at the expense of polar compounds. Co-pyrolysis of lignite and oil shale had a synergistic effect on yield which was small compared to the sweep effect. This oil shale-lignite synergism disappeared at high sweep velocities.
Original language | English |
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Pages (from-to) | 25-31 |
Number of pages | 7 |
Journal | Journal of Analytical and Applied Pyrolysis |
Volume | 29 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jun 1994 |
Keywords
- Co-pyrolysis
- lignite
- pyrolysis
- Seyitömer oil shale
- sweep pyrolysis.