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- Title
Characteristics of syngas reburning in a natural gas firing furnace - Effects of combustible gas species in the syngas.
- Authors
Chae, Taeyoung; Lee, Jaewook; Yang, Won; Ryu, Changkook
- Abstract
Co-firing of synthesis gas (syngas) produced from biomass/waste gasification is a promising option for increasing renewable energy production from existing boilers burning fossil fuels. This study presents an experimental approach to utilizing syngas as reburn fuel for NO emissions reduction. In a 65 kW furnace firing natural gas, the reburning characteristics for simulated syngas representing main syngas components, such as CH, CO and H, were evaluated for co-firing ratios up to 20%. The heating value and gas residence time of the syngas were maintained in the reburn zone by adjusting the N concentration. Detailed distribution of temperature, O and NO concentrations within the furnace were measured for the test conditions. The lower stoichiometric ratios of the primary combustion zone by reburning were favorable in reducing NO formation from the main fuel. Among the syngas components, CH was most efficient, exhibiting an immediate decrease in NO concentration after injection through the formation of HCN. CO and H also contributed to the reduction of NO emissions by suppressing further formation of NO in the reburn zone. The NO removal efficiency was diminished by an increase in NO concentrations in the burnout zone.
- Subjects
SYNTHESIS gas; NATURAL gas; FURNACE firing; BIOMASS; FOSSIL fuels
- Publication
Journal of Mechanical Science & Technology, 2016, Vol 30, Issue 8, p3861
- ISSN
1738-494X
- Publication type
Article
- DOI
10.1007/s12206-016-0751-z