| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 206334 | Fuel | 2012 | 6 Pages |
Medium-temperature gasifier pitch (MTP) is only partly soluble in acetonitrile, methanol and ethanol. Single-stage pitch extraction with a large quantity of methanol yielded two liquid phases containing 76 wt.% and 27 wt.% pitch respectively. The pitch fractions recovered from these two phases featured similar aromaticity indices. However, the pitch from the pitch-rich phase had a higher average molar mass and gave an improved carbon yield at 1000 °C. Analysis of the methanol-insoluble pitch fraction showed that methanol extraction at reflux temperatures effectively removed boronic acid model compounds from pitch samples spiked with the same.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Medium-temperature gasifier pitch is only partially soluble in methanol. ► This solvent preferentially extracts boron model compounds. ► The extraction residue had a higher molar mass and featured improved carbonization behavior.
