Effect of acid treatment atmosphere on the thermoplasticity of a low-volatile bituminous coal
| Autor: | Chun W. Lee, Robert G. Jenkins |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Thermoplastic
General Chemical Engineering geology Energy Engineering and Power Technology Mineralogy complex mixtures Atmosphere otorhinolaryngologic diseases medicine Coal Bituminous coal chemistry.chemical_classification Reaction behavior business.industry geology.rock_type technology industry and agriculture respiratory system respiratory tract diseases Fuel Technology Caking chemistry Chemical engineering Acid treatment Swelling medicine.symptom business |
| Zdroj: | Energy & Fuels. 3:703-706 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef00018a007 |
| Popis: | A strongly caking low-volatile bituminous coal was treated with HCl and HF under air and N 2 atmospheres. The thermoplastic properties of the raw and treated coals were examined in N 2 (1 atm) by use of a microdilatometer. It was found that coals treated with the acids in air exhibited the lowest maximum swelling parameter (V s , vol %) and weight loss during the dilatometry measurements. The above measured values were significantly restored for the coal acid treated under N 2 . The results indicate that acid treatment of this coal in air promotes low-temperature air oxidation of the coal, consequently reducing its thermoplastic properties. It is shown that the acids may be important in catalyzing low-temperature coal oxidation. The significance of the acid treatment atmosphere and its implication for the reaction behavior of acid-treated coals are also discussed |
| Databáze: | OpenAIRE |
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