Energy and exergy analysis of a sugar cane bagasse gasifier integrated to a solid oxide fuel cell based on a quasi-equilibrium approach

•Investigation on the exergetic feasibility of an integrated gasifier-SOFC system.•A gasifier model based on a quasi-equilibrium approach experimentally validated.•Integration of mathematical models for tar formation and carbon conversion.•A survey about the influence of process parameters on system...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2013-07, Vol.228, p.1121-1132
Main Authors: Arteaga-Pérez, Luis E., Casas-Ledón, Yannay, Pérez-Bermúdez, Raúl, Peralta, Luis M., Dewulf, Jo, Prins, Wolter
Format: Article
Language:English
Subjects:
air
Bagasse
biomass
Biomass gasification
Carbon
chemical engineering
Conversion
electrochemistry
electrodes
energy efficiency
Exergy
Fuel cell
fuel cells
Gasification
heat
hydrogen
Mathematical models
Oryza sativa
rice hulls
Solid oxide fuel cells
Sugar cane
sugarcane bagasse
temperature
Thermodynamic analysis
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Summary:•Investigation on the exergetic feasibility of an integrated gasifier-SOFC system.•A gasifier model based on a quasi-equilibrium approach experimentally validated.•Integration of mathematical models for tar formation and carbon conversion.•A survey about the influence of process parameters on systems performance. The objective of the paper being presented is to develop a comprehensive mathematical model of a bagasse gasification unit integrated with a solid oxide fuel cell, to predict the system performance using the energy and exergy criteria. The model addresses the quasi-equilibrium approach of the gasifier and the electrochemical behavior of a solid oxide fuel cell fed with producer gas. The quasi-equilibrium approach is discussed based on the experimental data from a pilot bubbling gasifier for two biomass sources: sugar cane bagasse and rice husk. The model considers the effect of equilibrium temperature, carbon conversion, heat losses and tar removal in the gasifier and the in situ reforming, water gas shift and hydrogen conversion within cell electrodes. The best results are obtained at 1023K and a 0.30 of air factor, under these conditions the total exergy efficiency is 35.20% and 58.85% of energy efficiency. After systems integration, the major exergy destruction is found in the gasifier ranging from 75% to 80% of the total loss.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2013.05.077