TY - GEN
T1 - Numerical simulation of the flow inside the entrained flow gasifier
AU - Janajreh, Isam
AU - Talab, Ilham
AU - Qudaih, Rana
PY - 2009
Y1 - 2009
N2 - Gasification is making a strong comeback as a sustainable energy source in clean energy systems such as IGCC, and as a renewable source utilizing millions of tons of waste dumped in the landfill, and avoiding risking our ecological system as a result of ground water leaching, and CO2 & CH 4 emissions. In this paper, reviews of the physical characteristics and conditions of the feedstock, gasification technologies, such as fixed bed, bubbling bed, the high-temperature entrained flow gasifier is first performed. Systematic gasification analyses for different feedstocks, including coal, biomass-coal blend, and industrial waste are presented. Species concentration and product/feedstock ratios that define the gasifier metrics including cold gas efficiency, conversion rate, and steam and Oxygen requirements are computed. A baseline gasifier geometry is selected and discretized to carry out detailed CFD analyses. Mesh resolution study of the incompressible, turbulent flow is carried out. Two-phase flow representing the continuous and the discrete (particle) feedstock is analyzed while maintaining two-way coupling. The velocity field is compared with that of a single phase and results on the effect of the particle size and injection velocity is presented. A coupled thermochemical analysis is then carried out while incorporating the species transport for both the homogeneous (gas/gas phase) and heterogeneous (gas/solid phase) interaction. Species distributions, including, CO, H2, CO 2, H2O, and O2 and other flow variables including temperature and velocity are computed and presented.
AB - Gasification is making a strong comeback as a sustainable energy source in clean energy systems such as IGCC, and as a renewable source utilizing millions of tons of waste dumped in the landfill, and avoiding risking our ecological system as a result of ground water leaching, and CO2 & CH 4 emissions. In this paper, reviews of the physical characteristics and conditions of the feedstock, gasification technologies, such as fixed bed, bubbling bed, the high-temperature entrained flow gasifier is first performed. Systematic gasification analyses for different feedstocks, including coal, biomass-coal blend, and industrial waste are presented. Species concentration and product/feedstock ratios that define the gasifier metrics including cold gas efficiency, conversion rate, and steam and Oxygen requirements are computed. A baseline gasifier geometry is selected and discretized to carry out detailed CFD analyses. Mesh resolution study of the incompressible, turbulent flow is carried out. Two-phase flow representing the continuous and the discrete (particle) feedstock is analyzed while maintaining two-way coupling. The velocity field is compared with that of a single phase and results on the effect of the particle size and injection velocity is presented. A coupled thermochemical analysis is then carried out while incorporating the species transport for both the homogeneous (gas/gas phase) and heterogeneous (gas/solid phase) interaction. Species distributions, including, CO, H2, CO 2, H2O, and O2 and other flow variables including temperature and velocity are computed and presented.
KW - CO & CH emission
KW - Thermochemical flow coupling
KW - Two-phase flow
KW - Waste-to-energy
UR - http://www.scopus.com/inward/record.url?scp=77953943313&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77953943313
SN - 9780791802908
T3 - UECTC'09 - Proceedings of 2009 US-EU-China Thermophysics Conference - Renewable Energy
BT - UECTC'09 - Proceedings of 2009 US-EU-China Thermophysics Conference - Renewable Energy
T2 - 2009 US-EU-China Thermophysics Conference - Renewable Energy, UECTC'09
Y2 - 28 May 2009 through 30 May 2009
ER -
