Observation of transient free radicals during coal pyrolysis
| Autor: | Herbert L. Retcofsky, Richard F. Sprecher |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Bituminous coal
Anthracene education.field_of_study Carbonization business.industry General Chemical Engineering Radical Organic Chemistry geology.rock_type Population geology Energy Engineering and Power Technology Liquefaction Photochemistry complex mixtures chemistry.chemical_compound Fuel Technology chemistry Organic chemistry Coal education business Pyrolysis |
| Zdroj: | Fuel. 62:473-476 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/0016-2361(83)90015-7 |
| Popis: | Electron spin resonance studies of the early stages of carbonization of a high-volatile A bituminous coal have been used to detect and quantify transient free radicals present in the coal pyrolysate. Free radical (spin) populations are converted from susceptibilities measured at elevated temperatures assuming that the population present after ≈1 h of pyrolysis does not change when the coal pyrolysate is cooled to 20 °C. Co-carbonization of 9–10 dihydroanthracene and anthracene with the coal suggest that disproportionation pathways may be preferred over combination pathways as temperatures of pyrolysis and of liquefaction processes are increased. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|