Occurrence and transformation of tricyclic aromatic hydrocarbons in low rank coals
✍ Scribed by István Hazai; Gábor Alexander
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 823 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0016-2361
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
A low-rank coal is examined for swelling in benzene-pyridine and toluene-pyridine mixtures. In each case, swelling is shown to be mainly due to the pyridine, the action of which is specific and not amenable to interpretation by the solubility parameter approach to understanding coal swelling.
Acidic functional groups in five low-rank coals from various parts of the world have been determined by aqueous ion exchange and non-aqueous titration procedures. The total acidity found by titration was, in general, significantly higher than that obtained by ion exchange at pH 13 for all the coals.
The extent of development of anisotropic texture in cokes prepared from various coals or blended coals in co-carbonization systems was assessed by using the ratio of hydrogen donor ability to acceptor ability. A parameter D/A, corresponding to the amount of hydrogen transfer during carbonization in
## Anisotropicdevelopment in a low-rank coal (Cerrej6n coal) has been induced using natural heavy oil or anthracene oil as additives in a cocarbonization system at 500°C. The heavy oil showed better modifying activity. To monitor the anisotropic development optical microscopy and e.s.r. spectrosco