Comparative study of low-temperature pyrolysis and solvent treatment on upgrading and hydro-liquefaction of brown coal. (1st July 2017)

• Record Type: Journal Article
• Authors: Yan, Jingchong; Bai, Zongqing; Hao, Pan; Bai, Jin; Li, Wen
• Is Part Of: Fuel. Volume 199(2017)
• Page Start: 598
• Page End: 605
• Publication Date: 2017-07-01
• Subjects: Brown coal -- Low-temperature pyrolysis -- Upgrading -- Hydro-liquefaction; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2017.03.029
• Languages: English
• ISSNs: 0016-2361

Abstract

Abstract: Low-temperature pyrolysis (LTP) and solvent treatment (Sol-T) of Yunnan brown coal were conducted for purpose of comparing their effects on upgrading and hydro-liquefaction. Sol-T is effective in both dewatering and deoxygenation of the brown coal. LTP is also effective in dewatering but less effective in deoxygenation, and more extensive cross-linking occurred during LTP than in Sol-T. Sol-T at mild temperatures (less than200 °C) enhances coal conversion and oil yield during hydro-liquefaction, while treatment at above 250 °C lowers coal conversion and oil yield. LTP of brown coal is definitely detrimental to its hydro-liquefaction, as both conversion and oil yield are significantly reduced. Thus, Sol-T at mild temperatures is more preferable for upgrading brown coals prior to their use in hydro-liquefaction.