Abstract / Description of output
The ignition temperature, burnout and NO emissions of blends of a semi-anthracite and a high-volatile bituminous coal with 10 and 20 wt.% of olive waste were studied under oxy-fuel combustion conditions in an entrained flow reactor (EFR). The results obtained under several oxy-fuel atmospheres (21%O 2-79%CO 2, 30%O 2-70%CO 2 and 35%O 2-65%CO 2) were compared with those attained in air. The results indicated that replacing N 2 by CO 2 in the combustion atmosphere with 21% of O 2 caused an increase in the temperature of ignition and a decrease in the burnout value. When the O 2 concentration was increased to 30 and 35%, the temperature of ignition was lower and the burnout value was higher than in air conditions. A significant reduction in ignition temperature and a slight increase in the burnout value was observed after the addition of biomass, this trend becoming more noticeable as the biomass concentration was increased. The emissions of NO during oxy-fuel combustion were lower than under air-firing. However, they remained similar under all the oxy-fuel atmospheres with increasing O 2 concentrations. Emissions of NO were significantly reduced by the addition of biomass to the bituminous coal, although this effect was less noticeable in the case of the semi-anthracite.
| Original language | English |
|---|---|
| Pages (from-to) | 429-435 |
| Number of pages | 7 |
| Journal | Energy |
| Volume | 41 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 May 2012 |
Keywords / Materials (for Non-textual outputs)
- Biomass
- Burnout
- Coal
- Ignition
- Oxy-fuel combustion