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The Combustion of Forest Humus Blended with Low-Rank Coal: Effects of Oxygen Ratio and Blending Ratio.
- Source :
- Processes; Jun2023, Vol. 11 Issue 6, p1615, 17p
- Publication Year :
- 2023
-
Abstract
- In this study, the combustion characteristics of pine needles, pine needle humus, and the co-combustion of these two types of biomass with coal were compared. In addition, the optimization of the combustion performance of coal/humus was assisted through the following studies: (i) the combustion performance of coal/pine needle humus was studied under four different oxygen concentrations (N<subscript>2</subscript>, 10%O<subscript>2</subscript>/90%N<subscript>2</subscript>, 20%O<subscript>2</subscript>/80%N<subscript>2</subscript>, and 40%O<subscript>2</subscript>/60%N<subscript>2</subscript>); (ii) the synergistic effect between the humus and coal during combustion was also investigated by adjusting the blending ratio and oxygen content; (iii) the mechanisms of the optimized combustion processes were expounded by kinetics and thermodynamics discussion. The results demonstrated that the combustion characteristics of the coal/humus blends were found to be higher than those of the coal/pine needle blends. The coupling interactions of the oxygen content and blending ratio contributed to the significant synergistic effect between the two fuels, and the synergistic effect showed a nonlinear variation with an increased oxygen concentration. The synergistic effect in a rich oxygen environment (O<subscript>2</subscript>40%/N<subscript>2</subscript>60%) is 5.1 times greater than that in the synthetic air (O<subscript>2</subscript>20%/N<subscript>2</subscript>80%) and 13.8 times greater than that in the oxygen-poor environment (O<subscript>2</subscript>10%/N<subscript>2</subscript>90%). Hence, the blending ratio could be adjusted to maintain the intensity of the synergistic effect in an oxygen-rich atmosphere. [ABSTRACT FROM AUTHOR]
- Subjects :
- CO-combustion
COAL combustion
HUMUS
COMBUSTION
PINE needles
COAL
OXYGEN
PULVERIZED coal
Subjects
Details
- Language :
- English
- ISSN :
- 22279717
- Volume :
- 11
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Processes
- Publication Type :
- Academic Journal
- Accession number :
- 164703191
- Full Text :
- https://doi.org/10.3390/pr11061615