Effect of air-oxidation on the pore-structure of coals and cokes or chars obtained from oxidized coals
| Autor: | Chikao Yokokawa, Masami Takeuchi, Hirokazu Oda |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Carbonization
General Chemical Engineering Organic Chemistry technology industry and agriculture Energy Engineering and Power Technology respiratory system complex mixtures respiratory tract diseases Hexane chemistry.chemical_compound Fuel Technology chemistry Chemical engineering otorhinolaryngologic diseases Organic chemistry Methanol |
| Zdroj: | Fuel. 60:390-396 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/0016-2361(81)90275-1 |
| Popis: | Seven kinds of coals (C, 77.8–89.8 wt% daf) were oxidized with air at 150 °C for 1, 5 and 10 h. The oxidized coals were heat-treated at various temperatures between 300 and 1500 °C with intervals of 50 or 100°C. The pore-structure of the oxidized coals and the cokes or chars obtained from the oxidized coals was compared with those of parent coals and their cokes or chars. True densities were measured in methanol and straight-chain hexane and pore volumes were determined by the Dubinin-Polanyi procedure. For the coals, the methanol-density increased with extent of oxidation; the hexane-density increased at first, but then decreased and again increased in the course of the oxidation. The air-oxidation of coals has a marked and controlling effect on the development of the pore-structure of cokes and chars in the course of the carbonization. |
| Databáze: | OpenAIRE |
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