Specific heat capacity and enthalpy of coal pyrolysis at elevated temperatures

✍ Scribed by Jerzy Tomeczek; Henryk Palugniok

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 720 KB
• Volume: 75
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(96)00067-1

✦ Synopsis

An experimental procedure was developed enabling the specific heat capacity and enthalpy of coal pyrolysis in the instantaneous state at a given temperature to be determined. It was used to measure the thermal properties of six coals and the mineral matter at temperatures up to 1300°C. The theoretically predicted maximum of the specific heat capacity at N 600°C was reproduced experimentally. However, for temperatures > 1000°C the models considerably overpredicted the experimental results. It was also found that between 300 and 800°C the decomposition of coal is endothermic, with the enthalpy of reaction N 120 kJ kg-' parent coal. Above 800°C decomposition of coal can vary from endothermic to exothermic, with the enthalpy up to 200 kJ kg-' parent coal.