Biomass-integrated gasification fuel cell systems - Part 2: Economic analysis

Abstract For the seven technically feasible Biomass-Integrated Gasification Fuel Cell (B-IGFC) systems investigated in this two-part system analysis, the interactions between the used biomass gasification processes, gas processing technologies and SOFC concepts are investigated primarily employing ASPEN PLUS™ flowsheeting models. Based on the results of the system simulations, the power production costs are estimated for the various B-IGFC systems. The impact of the most important assumptions made for the presented thermo-economic system analysis is assessed through a sensitivity analysis. It is found that the efficiency losses of the gasification process can hardly be compensated in the latter parts of the investigated B-IGFC systems. Thus, updraft gasification based systems yield the highest system efficiencies. The air-to-fuel ratio is highly cost effective as it determines the size of the heat exchangers and the power requirement of the cooling air blower, which both are the major cost drivers in the investigated B-IGFC systems. It was found that 55 to 70% of the power production costs are directly related to the specific plant costs while the remainder is determined by the system efficiency. The analysis revealed that it does not pay out to increase the system efficiency by increasing the operational voltage. This is beacuse the resulting decreased mean current density yields strongly increased specific plant costs and thus power production costs.

[1]  Donald E. Garrett,et al.  Chemical Engineering Economics , 1989 .

[2]  Richard Turton,et al.  Analysis, Synthesis and Design of Chemical Processes , 2002 .

[3]  François Maréchal,et al.  Process flow model of solid oxide fuel cell system supplied with sewage biogas , 2004 .

[4]  Tilman J. Schildhauer,et al.  Biomass-integrated gasification fuel cell systems – Part 1: Definition of systems and technical analysis , 2009 .

[5]  Florian-Patrice Nagel Electricity from wood through the combination of gasification and solid oxide fuel cells , 2008 .

[6]  François Maréchal,et al.  A methodology for thermo-economic modeling and optimization of solid oxide fuel cell systems , 2007 .

[7]  Emmanuel Kakaras,et al.  High temperature solid oxide fuel cell integrated with novel allothermal biomass gasification: Part I: Modelling and feasibility study , 2006 .

[8]  Eric Croiset,et al.  Simulation of a tubular solid oxide fuel cell stack using AspenPlusTM unit operation models , 2004 .

[9]  Stefano Campanari,et al.  Thermodynamic model and parametric analysis of a tubular SOFC module , 2001 .

[10]  Alexander Schuler,et al.  The impact of sulfur on the performance of a solid oxide fuel cell (SOFC) system operated with hydrocarboneous fuel gas , 2009 .

[11]  Daniel Favrat,et al.  Thermo-economic Optimization of a Solid Oxide Fuel Cell, Gas Turbine Hybrid System , 2007 .

[12]  M. Seemann Methanation of biosyngas in a fluidized bed reactor , 2007 .

[13]  François Maréchal,et al.  Thermo‐Economic Modelling and Optimisation of Fuel Cell Systems , 2005 .

[14]  Bjørn Thorud,et al.  Dynamic Modelling and Characterisation of a Solid Oxide Fuel Cell Integrated in a Gas Turbine Cycle , 2005 .

[15]  Hermann Hofbauer,et al.  Coupling of Biomass Steam Gasification and an SOFC-Gas Turbine Hybrid System for Highly Efficient Electricity Generation , 2004 .

[16]  T. Schildhauer,et al.  Performance comparison of planar, tubular and Delta8 solid oxide fuel cells using a generalized finite volume model , 2008 .

[17]  A. J. Toft,et al.  A techno-economic comparison of power production by biomass fast pyrolysis with gasification and combustion , 2002 .

[18]  Ralf E. Harth,et al.  The Chemical Heat Pipe EVA and ADAM , 1981 .