Back to Search
Start Over
Effects of inherent alkali and alkaline earth metals on nitrogen transformation during steam gasification of Shengli lignite.
- Source :
- International Journal of Coal Science & Technology; Jun2019, Vol. 6 Issue 2, p197-206, 10p
- Publication Year :
- 2019
-
Abstract
- This work evaluated the effects of inherent alkali and alkaline earth metals on nitrogen transformation during steam gasification of Shengli lignite at the temperature of 873–1173 K in a fluidized-bed/fixed-bed quartz reactor. The results indicated that the alkali metal Na and alkaline earth metals Ca, Mg in coal have different effects on inherent nitrogen transformation to NH<subscript>3</subscript>, HCN and char-N during the lignite steam gasification. Specifically during the steam gasification of Shengli lignite, Na and Ca, Mg not only catalyze the inherent nitrogen conversions to NH<subscript>3</subscript>, but also promote the secondary reactions of the nascent char-N as well as the generation of NH<subscript>3</subscript> from the generated HCN, meanwhile they also inhibited the inherent nitrogen conversion to HCN and char-N. The presence of Na, Ca and Mg hindered the formation of oxidized nitrogen (N-X) functional groups, but enhanced pyridinic nitrogen (N-6) and quaternary nitrogen's (N-Q) formation in char. [ABSTRACT FROM AUTHOR]
- Subjects :
- ALKALINE earth metals
LIGNITE
CHAR
ALKALI metals
STEAM
NITROGEN
ALKALIES
Subjects
Details
- Language :
- English
- ISSN :
- 20958293
- Volume :
- 6
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- International Journal of Coal Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 137207359
- Full Text :
- https://doi.org/10.1007/s40789-019-0248-3