Journal
CHEMICAL ENGINEERING & TECHNOLOGY
Volume 41, Issue 8, Pages 1682-1689Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201800122
Keywords
Alkaline-metal catalysts; Lignite; Low-rank coals; Supercritical water gasification
Categories
Funding
- National high technology research and development program (863 program) of China [2011AA05A201]
Ask authors/readers for more resources
The efficient utilization of abundant low-rank coals, which show high moisture and ash content, is significant for coal-based energy systems. The gasification of Zhaotong lignite was performed with different alkaline-metal catalysts, such as KOH, NaOH, K2CO3, and Na2CO3, in supercritical water. The behavior of the alkaline metal was also investigated. Potassium shows better catalytic activity than sodium. KOH not only promotes breakage of chemical bonds in the coal matrix to generate low-molecular-weight gases, but also alters the pore structure of the char to improve the gasification of carbon in the residue. However, potassium is partly inactivated upon reaction with minerals in coal in supercritical water gasification. In situ protection of potassium is realized by adding Ca(OH)(2) under supercritical conditions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available