✍ Scribed by Jan Surygała; Ewa Śliwka
No coin nor oath required. For personal study only.
Two Polish brown coals and two low-rank bituminous coals were subjected to low-temperature rapid pyrolysis to obtain tars. The reactive (phenolic, carbonyl and carboxyl) oxygen groups in the oils, asphaltenes and preasphaltenes of the tars were quantified. The amount of reactive oxygen groups in the bituminous coal tars was twice that in the brown coal tars, Phenolic groups predominated. Reactive oxygen in the oil fractions of the bituminous coal tars represented 80% of the total oxygen, and in the asphaltenes 9@100%.
Non-reactive oxygen occurred in greater proportions in the preasphaltenes.
📜 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