Simulation and optimization of gasoline autothermal reformer for fuel cell applications

Simulation and optimization of gasoline autothermal reformer for fuel cell applications

Fuel cell systems are being developed for powering clean, efficient automobiles of the future. The proton exchange membrane fuel cell (PEMFC) systems being developed for such use require a fuel gas that is either pure hydrogen, or a gas mixture that contains significant concentration of hydrogen. Th...

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Main Author: Aziz, Farhana
Format: Thesis
Language:English
Published: 2006
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/1489/1/FarhanaAzizFKKSA2006.pdf
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institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Aziz, Farhana
Simulation and optimization of gasoline autothermal reformer for fuel cell applications
description Fuel cell systems are being developed for powering clean, efficient automobiles of the future. The proton exchange membrane fuel cell (PEMFC) systems being developed for such use require a fuel gas that is either pure hydrogen, or a gas mixture that contains significant concentration of hydrogen. Thus, the vehicles with gasoline as the on-board fuel use a fuel processor, also referred to as an autothermal reformer, to convert gasoline to a fuel gas and reformate, that contains hydrogen, carbon dioxide, water vapor, and nitrogen, with trace levels of other species, such as carbon monoxide and unconverted gasoline. With the help of Aspen HYSYS 2004.1 the steady state model has been develop to analyze the fuel processor and total system performance. In this case study, the PEM fuel cell system consists of the fuel processing and clean-up section, PEM fuel cell section and auxiliary units. While the fuel processing and clean-up section consists of Autothermal Reformer, High-temperature Shift, Medium-temperature Shift, Low-temperature Shift, and Preferential Oxidation. The purpose of this study is to identify the influence of various operating parameters such as A/F and S/F ratio on the system performance that is also related to its dynamic behaviours. From the steady state model optimization using Aspen HYSYS 2004.1, an optimised reaction composition, in terms of hydrogen production and carbon monoxide concentration, corresponds to A/F ratio of 18.5 and S/F ratio of 9.0. Under this condition, n-octane conversion of 100%, H2 yield of 42% on wet basis and carbon monoxide concentration of 7.56ppm can be achieved. The fuel processor efficiency is about 80.41% under these optimised conditions.
format Thesis
qualification_level other
author Aziz, Farhana
author_facet Aziz, Farhana
author_sort Aziz, Farhana
title Simulation and optimization of gasoline autothermal reformer for fuel cell applications
title_short Simulation and optimization of gasoline autothermal reformer for fuel cell applications
title_full Simulation and optimization of gasoline autothermal reformer for fuel cell applications
title_fullStr Simulation and optimization of gasoline autothermal reformer for fuel cell applications
title_full_unstemmed Simulation and optimization of gasoline autothermal reformer for fuel cell applications
title_sort simulation and optimization of gasoline autothermal reformer for fuel cell applications
granting_institution Universiti Teknologi Malaysia, Chemical Engineering Department
granting_department Chemical Engineering Department
publishDate 2006
url http://eprints.utm.my/id/eprint/1489/1/FarhanaAzizFKKSA2006.pdf
_version_ 1747814378166550528
spelling my-utm-ep.14892018-02-20T05:11:43Z Simulation and optimization of gasoline autothermal reformer for fuel cell applications 2006-11 Aziz, Farhana TP Chemical technology Fuel cell systems are being developed for powering clean, efficient automobiles of the future. The proton exchange membrane fuel cell (PEMFC) systems being developed for such use require a fuel gas that is either pure hydrogen, or a gas mixture that contains significant concentration of hydrogen. Thus, the vehicles with gasoline as the on-board fuel use a fuel processor, also referred to as an autothermal reformer, to convert gasoline to a fuel gas and reformate, that contains hydrogen, carbon dioxide, water vapor, and nitrogen, with trace levels of other species, such as carbon monoxide and unconverted gasoline. With the help of Aspen HYSYS 2004.1 the steady state model has been develop to analyze the fuel processor and total system performance. In this case study, the PEM fuel cell system consists of the fuel processing and clean-up section, PEM fuel cell section and auxiliary units. While the fuel processing and clean-up section consists of Autothermal Reformer, High-temperature Shift, Medium-temperature Shift, Low-temperature Shift, and Preferential Oxidation. The purpose of this study is to identify the influence of various operating parameters such as A/F and S/F ratio on the system performance that is also related to its dynamic behaviours. From the steady state model optimization using Aspen HYSYS 2004.1, an optimised reaction composition, in terms of hydrogen production and carbon monoxide concentration, corresponds to A/F ratio of 18.5 and S/F ratio of 9.0. Under this condition, n-octane conversion of 100%, H2 yield of 42% on wet basis and carbon monoxide concentration of 7.56ppm can be achieved. The fuel processor efficiency is about 80.41% under these optimised conditions. 2006-11 Thesis http://eprints.utm.my/id/eprint/1489/ http://eprints.utm.my/id/eprint/1489/1/FarhanaAzizFKKSA2006.pdf application/pdf en public other Universiti Teknologi Malaysia, Chemical Engineering Department Chemical Engineering Department Aartun, I., Venvik, H.J., Holmen, A., Pfeifer, P. and Gorke, O. (2005). “Temperature Profiles and Residence Time Effects during Catalytic POX and Oxidative SR of Propane in Metallic Microchannel Reactors.� Catalysis Today. 110. 98-107. Agosta, A., Cernansky, N.P., Miller, D.L., Faravelli, T. and Ranzi, E. (2004). “Reference Components of Jet Fuels: Kinetic Modeling and Experimental Results.� Experimental Thermal and Fluid Science. 28. 701–708. Ahmed, S., Ahluwalia, R., Lee, S.H.D. and Lottes, S. (2006). “A Gasoline Fuel Processor Designed to Study Quick-Start Performance.� Journal of Power Sources. 154. 214-222. Avci, A.K., Onsan, Z.I. and Trimm, D.L. 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