TY - JOUR
T1 - Biomass co-firing under oxy-fuel conditions
T2 - A computational fluid dynamics modelling study and experimental validation
AU - Álvarez, L.
AU - Yin, Chungen
AU - Riaza, J.
AU - Pevida, C.
AU - Pis, J.J.
AU - Rubiera, F.
PY - 2014/4
Y1 - 2014/4
N2 - 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.
AB - 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.
KW - Biomass co-firing
KW - Synergy effects
KW - Oxy-fuel combustion
KW - Below-zero CO2 emission
KW - Computational Fluid Dynamics (CFD)
U2 - 10.1016/j.fuproc.2013.12.005
DO - 10.1016/j.fuproc.2013.12.005
M3 - Journal article
SN - 0378-3820
VL - 120
SP - 22
EP - 33
JO - Fuel Processing Technology
JF - Fuel Processing Technology
ER -