期刊
APPLIED THERMAL ENGINEERING
卷 123, 期 -, 页码 448-457出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2017.05.128
关键词
Biomass gasification; Gasification modeling; Miscanthus; Fluidized bed; CFD
资金
- Portuguese Foundation for Science and Technology [SFRH/BD/110787/2015]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/110787/2015] Funding Source: FCT
In this work, a comprehensive two-dimensional computational fluid dynamics model was used in order to assess the potential of syngas produced from gasification of Portuguese miscanthus by using a semi industrial gasification plant. An Eulerian-Eulerian approach is used in the fluent environment to describe the transport of mass exchange, momentum and energy for both solid and gas phases. The results were obtained after comparing both the numerical model and the experimental data for validation. The simulated syngas composition was found to be in good agreement with the experiment. The effect of equivalent ratio (ER), temperature and steam-to-biomass ratio (SBR) on products of gasification and their concentrations were assessed. The ER has some negative effects on syngas quality (decrease of fuel gases and lower heating value (LHV)) and some positive effect on the carbon conversion efficiency (CCE) and on the reduction of tar content. The reactor temperature has a positive effect on syngas quality (increase of fuel gases, lower heating value and decrease of tars). High temperatures also favor the gasification efficiency. The SBR has some positive effects on syngas quality (increase of H-2 content and reduction of tars) and some negative effect on syngas LHV and there are some particular SBR that maximizes the CCE and CGE. (C) 2017 Elsevier Ltd. All rights reserved.
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