Ignition and NO Emissions of Coal and Biomass Blends under Different Oxy-fuel Atmospheres
The effect of co-firing coal and biomass on the ignition behaviour and NO emissions was evaluated under both air and O2/CO2 (21-35% O2) atmospheres. The results showed a worsening of the ignition properties in the 21%O2/79%CO2 atmosphere in comparison with air. Furthermore, in order to obtain similar or better ignition properties, the oxygen concentration in the O2/CO2 mixture must be 30% or higher. A decrease of the ignition temperature was observed with the addition of biomass in air and oxy-fuel conditions. The results also indicate that NO emissions in the 21%O2/79%CO2 atmosphere were lower than under air-firing conditions, although they increased in the 30%O2/70%CO2 and 35%O2/65%CO2 atmospheres. The addition of biomass resulted in lower NO emissions in all cases.
| Main Authors: | , , , , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Elsevier
2013-08
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| Subjects: | Oxy-combustion, Coal, Biomass, Ignition behaviour, NO emissions, Entrained flow reactor, |
| Online Access: | http://hdl.handle.net/10261/111595 |
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| Summary: | The effect of co-firing coal and biomass on the ignition behaviour and NO emissions was evaluated under both air and O2/CO2 (21-35% O2) atmospheres. The results showed a worsening of the ignition properties in the 21%O2/79%CO2 atmosphere in comparison with air. Furthermore, in order to obtain similar or better ignition properties, the oxygen concentration in the O2/CO2 mixture must be 30% or higher. A decrease of the ignition temperature was observed with the addition of biomass in air and oxy-fuel conditions. The results also indicate that NO emissions in the 21%O2/79%CO2 atmosphere were lower than under air-firing conditions, although they increased in the 30%O2/70%CO2 and 35%O2/65%CO2 atmospheres. The addition of biomass resulted in lower NO emissions in all cases. |
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