Abstract
This paper presents an experimental and numerical study on co-firing olive waste (0, 10%, 20% on mass basis) with two coals in an entrained flow reactor under three oxy-fuel conditions (21%O2/79%CO2, 30%O2/70%CO2 and 35%O2/65%CO2) and air–fuel condition. Co-firing biomass with coal was found to have favourable synergy effects in all the cases: it significantly improves the burnout and remarkably lowers NOx emissions. The reduced peak temperatures during co-firing can also help to mitigate deposition formation in real furnaces. Co-firing CO2-neutral biomass with coals under oxy-fuel conditions can achieve a below-zero CO2 emission if the released CO2 is captured and sequestered. The model-predicted burnout and gaseous emissions were compared against the experimental results. A very good agreement was observed, the differences in a range of ± 5–10% of the experimental values, which indicates the model can be used to aid in design and optimization of large-scale biomass co-firing under oxy-fuel conditions.
Original language | English |
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Journal | Fuel Processing Technology |
Volume | 120 |
Pages (from-to) | 22-33 |
Number of pages | 12 |
ISSN | 0378-3820 |
DOIs | |
Publication status | Published - Apr 2014 |
Keywords
- Biomass co-firing
- Synergy effects
- Oxy-fuel combustion
- Below-zero CO2 emission
- Computational Fluid Dynamics (CFD)