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CFD modeling of a fluidized bed sewage sludge gasifier for syngas
Author(s) -
Wang Yiqun,
Yan Lifeng
Publication year - 2008
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.128
Subject(s) - wood gas generator , syngas , computational fluid dynamics , fluidized bed , combustion , turbulence , fluent , environmental science , waste management , process engineering , sewage sludge , nuclear engineering , chemistry , mechanics , petroleum engineering , engineering , physics , sewage , organic chemistry , coal , hydrogen
A three‐dimensional model of a fluidized bed for sewage sludge gasification is presented. The model describes the complex physical and chemical phenomena in the gasifier, including turbulent flow, heat and mass transfer, and chemical reactions. The simulation employs the standard κ− ε turbulence model for the gas phase in an Eulerian framework, and the discrete phase model for the sludge particles in a Lagrangian framework, coupled with the nonpremixed combustion model for chemical reactions. In terms of the Computational Fluid Dynamics (CFD) software Fluent 6.1, the simulations provide detailed information on the gas products' composition and temperature distribution inside the gasifier and at the outlet. The results are compared with the experimental data in literature (Manya et al. , 2005). Effects of temperature and equivalence ratio (ER) on the product syngas (H 2 + CO) quality are studied. The model shows good agreement with the experimental data. Copyright © 2008 Curtin University of Technology and John Wiley & Sons, Ltd.