Spatial distribution of emissions, temperatures, and particulate matter in a combustion zone of a pellet boiler
Particulate matter (PM) and gaseous emissions from combustion pose a significant threat to air quality and human health. This study investigates the spatial distribution of PM and gaseous emissions within the combustion chamber of a small-scale pellet boiler. Real-time O2, CO2, CO, NOx, PM, and temp...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25008913 |
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| Summary: | Particulate matter (PM) and gaseous emissions from combustion pose a significant threat to air quality and human health. This study investigates the spatial distribution of PM and gaseous emissions within the combustion chamber of a small-scale pellet boiler. Real-time O2, CO2, CO, NOx, PM, and temperature measurements were conducted. Wood pellet combustion experiments were performed on an automatic bottom-feed boiler. Measurements were taken at various points within a 16 × 16 × 16 cm volume above the retort using a separate extraction system. Average CO, CO2, and temperature decreased with distance from the burner, while O2 levels increased. The maximum temperature (900 °C) and PM concentration (133.7 mg/m3) were recorded closest to the burning pellet layer, with 19 % of the total vertical temperature drop occurring just above it, followed by a peak gradient (31 %) between the next two layers. Elevated PM levels were also detected in cooler regions outside the flame. Total NOx concentrations were generally consistent. The highest CO concentration (10062.6 mg/m3) coincided with the highest O2 content (19.23 %) outside the main flame. To analyze correlations between emissions and local temperatures, linear and polynomial regression models were developed. Correlations were identified between local oxygen availability, temperature, and emission concentrations. |
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| ISSN: | 2214-157X |