Abstract
Co-gasified biomass and coal can be considered a potential fuel base for gasification and offers the advantage of a reduction in CO2 emissions. In addition, use of biomass could contribute to a reduction in fossil fuel dependency. In this study, a mixture of woody biomass and coal was gasified with air and steam to discuss the molar ratio of H2, CH 4, CO and CO2 in the product gas. In addition, the effect of the mixtures with varying ratio of steam/fuel in a wide range on co-gasification behavior was investigated taking into account the gasification behavior of each feedstock. A comprehensive three-dimensional simulation model was developed for co-gasifiers. The co-gasifier was numerically modeled by simultaneously solving the rate equations for chemical reactions of the solid and gas phases for coal and biomass. Three-dimensional computational fluid dynamics (CFD) modeling on gasification performance in an one-stage entrained bed coal and biomass co-gasifier was performed for parametric studies with various steam/fuel ratios (0.008, 0.016, 0.025, 0.033, 0.042, 0.05, 0.058, 0.066, 0.075) using a commercial code, ANSYS FLUENT 14. The CFD modeling was conducted by solving steady-state Navier-Stokes equations with the Eulerian-Lagrangian method. Chemical reactions were solved via the Finite-Rate/Eddy-Dissipation Model for gas phase. Optimal conditions of steam/fuel ratio for this study gasifier using design coal and biomass were obtained as 0.058. Carbon conversion efficiencies, cold gas efficiencies, exit temperature and species mole fractions were also calculated by CFD modeling.
| Original language | English |
|---|---|
| Pages | 3723-3730 |
| Number of pages | 8 |
| Publication status | Published - 2013 Jan 1 |
| Event | 30th Annual International Pittsburgh Coal Conference 2013, PCC 2013 - Beijing, China Duration: 2013 Sep 15 → 2013 Sep 18 |
Other
| Other | 30th Annual International Pittsburgh Coal Conference 2013, PCC 2013 |
|---|---|
| Country | China |
| City | Beijing |
| Period | 13/9/15 → 13/9/18 |
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All Science Journal Classification (ASJC) codes
- Geochemistry and Petrology
- Geotechnical Engineering and Engineering Geology
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A numerical study on coal-biomass co-gasification according to steam/fuel ratio. / Lee, Jung Hoon; Jeong, Hyo Jae; Park, Sang Shin; Hwang, Jungho.
2013. 3723-3730 Paper presented at 30th Annual International Pittsburgh Coal Conference 2013, PCC 2013, Beijing, China.Research output: Contribution to conference › Paper
TY - CONF
T1 - A numerical study on coal-biomass co-gasification according to steam/fuel ratio
AU - Lee, Jung Hoon
AU - Jeong, Hyo Jae
AU - Park, Sang Shin
AU - Hwang, Jungho
PY - 2013/1/1
Y1 - 2013/1/1
N2 - Co-gasified biomass and coal can be considered a potential fuel base for gasification and offers the advantage of a reduction in CO2 emissions. In addition, use of biomass could contribute to a reduction in fossil fuel dependency. In this study, a mixture of woody biomass and coal was gasified with air and steam to discuss the molar ratio of H2, CH 4, CO and CO2 in the product gas. In addition, the effect of the mixtures with varying ratio of steam/fuel in a wide range on co-gasification behavior was investigated taking into account the gasification behavior of each feedstock. A comprehensive three-dimensional simulation model was developed for co-gasifiers. The co-gasifier was numerically modeled by simultaneously solving the rate equations for chemical reactions of the solid and gas phases for coal and biomass. Three-dimensional computational fluid dynamics (CFD) modeling on gasification performance in an one-stage entrained bed coal and biomass co-gasifier was performed for parametric studies with various steam/fuel ratios (0.008, 0.016, 0.025, 0.033, 0.042, 0.05, 0.058, 0.066, 0.075) using a commercial code, ANSYS FLUENT 14. The CFD modeling was conducted by solving steady-state Navier-Stokes equations with the Eulerian-Lagrangian method. Chemical reactions were solved via the Finite-Rate/Eddy-Dissipation Model for gas phase. Optimal conditions of steam/fuel ratio for this study gasifier using design coal and biomass were obtained as 0.058. Carbon conversion efficiencies, cold gas efficiencies, exit temperature and species mole fractions were also calculated by CFD modeling.
AB - Co-gasified biomass and coal can be considered a potential fuel base for gasification and offers the advantage of a reduction in CO2 emissions. In addition, use of biomass could contribute to a reduction in fossil fuel dependency. In this study, a mixture of woody biomass and coal was gasified with air and steam to discuss the molar ratio of H2, CH 4, CO and CO2 in the product gas. In addition, the effect of the mixtures with varying ratio of steam/fuel in a wide range on co-gasification behavior was investigated taking into account the gasification behavior of each feedstock. A comprehensive three-dimensional simulation model was developed for co-gasifiers. The co-gasifier was numerically modeled by simultaneously solving the rate equations for chemical reactions of the solid and gas phases for coal and biomass. Three-dimensional computational fluid dynamics (CFD) modeling on gasification performance in an one-stage entrained bed coal and biomass co-gasifier was performed for parametric studies with various steam/fuel ratios (0.008, 0.016, 0.025, 0.033, 0.042, 0.05, 0.058, 0.066, 0.075) using a commercial code, ANSYS FLUENT 14. The CFD modeling was conducted by solving steady-state Navier-Stokes equations with the Eulerian-Lagrangian method. Chemical reactions were solved via the Finite-Rate/Eddy-Dissipation Model for gas phase. Optimal conditions of steam/fuel ratio for this study gasifier using design coal and biomass were obtained as 0.058. Carbon conversion efficiencies, cold gas efficiencies, exit temperature and species mole fractions were also calculated by CFD modeling.
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M3 - Paper
SP - 3723
EP - 3730
ER -