Modeling circulating fluidized bed biomass gasifiers. Results from a pseudo-rigorous 1-dimensional model for stationary state |
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| Affiliation: | 1. Dept. of Built Environment and Energy Technology, Linnaeus University, 351 95 Växjö, Sweden;2. Dept. of Energy and Environment, Chalmers University of Technology, 412 58 Gothenburg, Sweden;1. School of Chemical & Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China;2. Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia;1. Process and Environmental Research Division, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom;2. Chemical Engineering and Applied Chemistry, Aston University, Birmingham B4 7ET, United Kingdom;3. Faculty of Science and Engineering, University of Nottingham Ningbo China, Taikang East Road, Ningbo 315100, China |
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| Abstract: | Results from a 1-dimensional and semirigorous model for atmospheric and circulating fluidized bed biomass gasifiers (CFBBGs), presented in the (previous) paper by Corella and Sanz J. Corella, A. Sanz, Modeling circulating fluidized bed biomass gasifiers. A pseudo-rigorous model for stationary state. Fuel Process. Technol. 86 (2005) 1021–1053], are shown here. Process variables predicted by the model are gas composition (H2, CO, CO2, CH4, C2Hn, H2O and O2 contents), gas yield, tar content in the flue gas and char concentration in the solids. Both axial profiles in the riser and values at the gasifier exit are calculated from the model and are shown here for some selected sets of process variables. Variables analyzed in depth are: total air flow (used as equivalence ratio, ER), percentage of secondary air flow, height (location) of the secondary air flow, biomass moisture and biomass flow rate, expressed as the biomass weight hourly space velocity in the gasifier. All the results from the model agree both with known published data and with some tests made to check the model. |
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