Improvement of Devolatilization and Control of Low-temperature Oxidation by Vacuum Drying and Tar Coating Treatments of Low-rank Coal

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Hiromoto Usui¹  Mahidin²  Yuji Ogaki²  Yoko Nakata¹ 

[1] Department of Chemical Science and Engineering, Kobe University;Graduate School of Science and Technology, Kobe University

关键词: Vacuum Drying;    Tar Coating;    Devolatilization;    Oxygen Adsorption;    Low-temperature Oxidation;   

DOI  :  10.1252/jcej.36.769

来源: Maruzen Company Ltd

【 摘 要 】

References(23)Cited-By(2)Upgrading of low-rank coal by means of a combined process of vacuum drying and tar coating has been conducted in order to suppress low-temperature oxidation and spontaneous combustion of coal. Some advantages on improvement of devolatilization and control of low-temperature oxidation have been observed. This upgrading technique was able to produce the upgraded coals comparable to bituminous coal particularly in moisture, volatile matter and carbon contents. Total weight loss and devolatilization significantly increased with an increase of the upgrading temperature, from 29.5 and 10.5%, respectively at 200°C to 36.5 and 21.9%, respectively, at 300°C. Moreover, upgraded coals showed a lower propensity to oxygen attack and low-temperature oxidation.

【 授权许可】

Unknown