Journal
FUEL PROCESSING TECHNOLOGY
Volume 89, Issue 11, Pages 1207-1217Publisher
ELSEVIER
DOI: 10.1016/j.fuproc.2008.05.020
Keywords
Biomass gasification; Synthesis gas; Hydrogen; Process modelling; Simulation
Funding
- European Commission [ENK5-CT-2001-00545]
- Renewable Energy Network Austria - ReNet
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A process model of dual fluidized bed gasification is presented based on mass- and energy balances. The model further covers the evaluation of thermodynamic equilibrium states. The gasification is investigated for the special case that CaO/CaCO3 is used as bed material allowing selective transport Of CO2 from the gasification reactor to the combustion reactor by repeated carbonation and calcination. Experimental data are used to determine the model parameters. An empirical approach towards the kinetics of fuel conversion allows prediction of process behaviour at varied fuel water content. The selective transport of CO2 results in high H-2 contents in the produced syngas. The lower operating temperatures in the gasification reactor increase the efficiency of energy conversion. The results are in agreement with experimental data and show the thermodynamic limitations of the technology. (C) 2008 Elsevier B.V. All rights reserved.
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