Abstract
In this paper, hydrothermal upgrading of Baorixile lignite were carried out under 200~350℃ without adding extra water, and the upgraded products were compared with the thermal upgraded products under the same conditions. The experiment results showed that the hydrothermal process had a much better modification performance of coal properties. The content of fixed carbon of hydrothermal upgraded coals was higher than that of thermal upgraded coals, whereas the solid yield of hydrothermal upgraded coals was lower. With the increase of treatment temperature, the pore structure of hydrothermal upgraded coals firstly increased and then decreased, however, the pore structure of thermal upgraded only changed slightly. Hydrothermal upgrading had a stronger effect on the removal of oxygen-containing functional groups in lignite, and the relative percentages of aliphatic and aromatic carbons of hydrothermal upgraded coals were respectively lower and higher. The internal moisture of lignite had a significant influence on the evolution of organic structure during hydrothermal process.
| Original language | English |
|---|---|
| Pages (from-to) | 1621-1629 |
| Number of pages | 9 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 39 |
| Issue number | 7 |
| State | Published - 1 Jul 2018 |
| Externally published | Yes |
Keywords
- Hydrothermal upgrading
- Lignite
- Physicochemical structure
- Thermal upgrading
- Utilization of water
Fingerprint
Dive into the research topics of 'Effect of Hydrothermal Upgrading on the Physico-Chemical Structure of Lignite Based on the Utilization of Original Water'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver