Thermoplastic behaviour of coal and its relationship to coke structure during high pressure carbonization

✍ Scribed by Man-Leung Chan; Norman D. Parkyns; K.Mark Thomas

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 790 KB
• Volume: 70
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(91)90137-y

✦ Synopsis

The thermoplastic properties of three coals of rank 301a to 602 in the British Coal Classification Scheme were investigated using a high pressure dilatometer and a high pressure constant shear rate plastometer. The results show that some measurements of thermoplastic behaviour, for example, dilatation and coking intensity, are very dependent on heating rate and pressure. In contrast, the plastometry caking intensity only varies slightly with heating rate and pressure. The optical anisotropy of the carbonized residues from the high pressure thermoplasticity experiments increased markedly with increasing heating rate. The relationships between dilatometry, plastometry and optical anisotropy under a range of experimental conditions are complex and indicate that the measurements are most relevant when they are carried out under simulated process conditions.