Determination of carboxyl groups in Yallourn brown coal
β Scribed by Harry N.S. Schafer; Mary J. Wornat
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 391 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0016-2361
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Table 1 Effect of iron on dry hydrogenation of coal Conversion to Conversion to liquid and gas asphaltene Charge (% dmmf coal) (% dmmf coal) Coal 12.7 Not determined Coal+S 22.8 Not determined Coal+Fe 33.2 14.3 Coal+S+Fe 93.0 47.3 ## Short Communications Table 2 Results of variation of iron conce
Pale, medium-light and medium-dark lithotypes of Yallourn coal were hydrogenated with and without ZnCl,containing catalysts (400X, 9.8 MPa H2 and 3 h). The degree of hydroliquefaction wasexamined petrographically. Without catalyst, the amounts of water produced can be correlated with the amounts of
Carbon dioxide evolved on heating samples for 3 h, and carboxyl-group content of residues fmeqfg dry acid-form coal basis) Cation-form Coal form Acid-form Mg Ca Na COOH COOH COOH COOH z z G 3
## Yallourn (Australian) brown coal (66.6 wt% C) was depolymerized three times in phenol, using p-toluenesulphonic acid as catalyst. After each reaction the product was extracted with pyridine. The pyridine extracts were then methylated and fractionated by g.p.c. to obtain the molecular weight dis