Analysis of a SOFC energy generation system fuelled with biomass reformate

Abstract Biomass reformation is an interesting path for hydrogen production and its use for efficient energy generation. The main target is the fully exploitation of the potential of renewable fuels. To this aim, the coupling a biomass reformer together with a high temperature solid oxide fuel cell (SOFC) stack shows some advantages for the similar operating temperature of the two processes and the internal reforming capability of the SOFC. The latter further allows less stringent composition requirements of the feed gas from a gasifier and internal cooling of the SOFC. In this work, a complete model of a SOFC coupled with a biomass gasifier is used to identify the main effects of the operating conditions on the fuel cell performance. The gasification process has been simulated by an equilibrium model able to compute the reformate composition under different operating conditions, whereas a 3D fluid dynamics simulation (FLUENT) coupled with an external model for the electrochemical reactions has been used to predict the fuel cell performance in terms of electrical response and mass-energy fluxes. A 14 kW integrated SOFC-gasifier system has been analysed with this model to address the response of a planar SOFC as a function of the gasifier operating conditions.

[1]  K. N. Seetharamu,et al.  Prediction of performance of a downdraft gasifier using equilibrium modeling for different biomass materials , 2001 .

[2]  Frank A. Coutelieris,et al.  Fuel options for solid oxide fuel cells: A thermodynamic analysis , 2003 .

[3]  I. Yasuda,et al.  3-D model calculation for planar SOFC , 2001 .

[4]  D. Favrat,et al.  CFD simulation tool for solid oxide fuel cells , 2004 .

[5]  E. Riensche,et al.  Methane/steam reforming kinetics for solid oxide fuel cells , 1994 .

[6]  S. Chan,et al.  A complete polarization model of a solid oxide fuel cell and its sensitivity to the change of cell component thickness , 2001 .

[7]  Nigel P. Brandon,et al.  Modelling system efficiencies and costs of two biomass-fuelled SOFC systems , 2004 .

[8]  Chao-Yang Wang,et al.  Fundamental models for fuel cell engineering. , 2004, Chemical reviews.

[9]  S. Campanari,et al.  Definition and sensitivity analysis of a finite volume SOFC model for a tubular cell geometry , 2004 .

[10]  Kohei Ito,et al.  Performance analysis of planar-type unit SOFC considering current and temperature distributions , 2000 .

[11]  Phillip N. Hutton,et al.  A cell-level model for a solid oxide fuel cell operated with syngas from a gasification process , 2005 .

[12]  Phillip N. Hutton,et al.  Carbon deposition in an SOFC fueled by tar-laden biomass gas: a thermodynamic analysis , 2005 .

[13]  M. Khaleel,et al.  Three-dimensional thermo-fluid electrochemical modeling of planar SOFC stacks , 2003 .

[14]  Y. Matsuzaki,et al.  The Poisoning Effect of Sulfur-Containing Impurity Gas on a SOFC Anode: Part I , 2000 .

[15]  M. Chyu,et al.  Simulation of the chemical/electrochemical reactions and heat/mass transfer for a tubular SOFC in a stack , 2003 .

[16]  R. Herbin,et al.  Three-dimensional numerical simulation for various geometries of solid oxide fuel cells , 1996 .

[17]  James Larminie,et al.  Fuel Cell Systems Explained , 2000 .