As an aid to improving the dynamic response of the steam reformer, a dynamic model is developed to provide preliminary characterizations of the major constraints that limit the ability of a reformer to respond to the varying output requirements occurring in vehicular applications. This model is a first principles model that identifies important physical parameters in the steam reformer. The model is then incorporated into a design optimization process, where minimum steam reformer response time is specified as the objective function. This tool is shown to have the potential to be a powerful means of determining the values of the steam reformer design parameters that yield the fastest response time to a step input in hydrogen demand for a given set of initial conditions. A more extensive application of this methodology, yielding steam reformer design recommendations, is contained in a related publication.

Issue Section:
Technical Papers
Keywords:
fuel cell vehicles, equations of state, optimisation, steam
Topics:
Design, Optimization, Steam, Hydrogen, Methanol
1.
Kumar, R., Krumpelt, M., and Misra, B., Fuel Cells for Vehicular Propulsion Applications: A Thermodynamic Systems Analysis, 24th Intersociety Energy Conversion Engineering Conference, August 6–11, 1989, Crystal City, Washington, DC, paper #CONF-890815—26, 1989.
2.
Patil, P. G. et al., National Program Plan: Fuel Cells in Transportation, Executive Summary, document #DOE/CH-9301a, February 1993.
3.
Huff, J. R., Fuel Cell Powerplants for Transportation Applications, Presentation at the Seventh Annual Battery Conference on Applications and Advances, January 21–23, 1992, and Publications and Proceedings, paper #LA-UR—91-3900, 1992.
4.
Helms, H. E., and Haley, P. J., Development of a PEM Fuel Cell System for Vehicular Application, Society of Automotive Engineers paper #921541, 1992.
5.
Ahmed, S., Kumar, R., and Krumpelt, M., Development of a Catalytic Partial Oxidation Reformer for Methanol Used in Fuel Cell Propulsion Systems, 1994 Fuel Cell Seminar, November 28–December 1, 1994, San Diego, CA, Program and Abstracts, December 1994.
6.
Loftus, P., Thijssen, J., Bentley, J., and Bowman, J., Development of a Multi-Fuel Partial Oxidation Reformer for Transportation Applications, 1994 Fuel Cell Seminar, November 28–December 1, 1994, San Diego, CA, Program and Abstracts, December 1994.
7.
Geyer, H. K., Ahluwalia, R., Krumpelt, M., and Kumar, R., Transportation Polymer Electrolyte Fuel Cell Systems for Different On-Board Fuels, 1994 Fuel Cell Seminar, November 28–December 1, 1994, San Diego, CA, Program and Abstracts, December 1994.
8.
Amphlett, J. C., Mann, R. F., Peppley, B. A., and Stokes, D. M., Some Design Considerations for a Catalytic Methanol Steam Reformer for a PEM Fuel Cell Power Generating System, The 26th Intersociety Energy Conversion Engineering Conference (3), Proceedings, pp. 642–649, 1991.
9.
Vanderborgh, N. E., McFarland, R. D., and Huff, J. R., Advanced System Analysis for Indirect Methanol Fuel Cell Power Plants for Transportation Applications, 1990 Fuel Cell Seminar, November 25–28, 1990, Phoenix, AZ, Proceedings, paper #LA-UR—90-3356, November 1990.
10.
The´rien, N., and Tessier, P., Modeling and Simulation of the Catalytic Decomposition of Methanol in a Fixed Bed Reactor, Canadian Journal of Chemical Engineering, vol. 65, pp. 950–957, December 1987 (in French).
11.
Ohl, G. L., Dynamic Analyses Of A Methanol To Hydrogen Steam Reformer For Transportation Applications, Ph.D. Thesis, Department of Mechanical Engineering and Applied Mechanics, The University of Michigan, 1995.
12.
Ohl, G. L., Stein, J. L., and Smith, G. E., Fundamental Factors in the Design of a Fast Responding Methanol to Hydrogen Steam Reformer for Transportation Applications, Transactions of the ASME: Journal of Energy Resources Technology, vol. 118, no. 2, June 1996.
13.
Amphlett, J. C., Evans, M. J., Mann, R. F., and Weir, R. D., Hydrogen Production by the Catalytic Steam Reforming of Methanol—Part 2: Kinetics of Methanol Decomposition Using Girdler G66B Catalyst, Canadian Journal of Chemical Engineering, vol. 63, pp. 605–611, August 1985.
14.
Amphlett, J. C., Mann, R. F., and Weir, R. D., Hydrogen Production by the Catalytic Steam Reforming of Methanol—Part 3: Kinetics of Methanol Decomposition Using C18HC Catalyst, Canadian Journal of Chemical Engineering, vol. 66, pp. 950–956, December 1988.
15.
Jiang, C. J., Trimm, D. L., and Wainwright, M. S., Kinetic Mechanism for the Reaction Between Methanol and Water Over a Cu-ZnO-Al2O3 Catalyst, Applied Catalysis A: General, vol. 97, pp. 145–158, 1993.
16.
Pour, V., Bartonˇ, J., and Benda, A., Kinetics of a Catalyzed Reaction of Methanol with Water Vapor, Collection Czechoslov. Chem. Commun., vol. 40, pp. 2923–2934, 1975.
17.
Santacesaria, E., and Carra`, S., Kinetics of Catalytic Steam Reforming of Methanol in a CSTR Reactor, Applied Catalysis, vol. 5, pp. 345–358, 1983.
18.
Fogler, H. S., Elements of Chemical Reactor Engineering, second edition, Englewood Cliffs: Prentice Hall, 1992.
19.
Swathirajan, S., General Motors Program on Fuel Cell R&D for Vehicles, 1994 Fuel Cell Seminar, November 28–December 1, 1994, San Diego, CA, Program and Abstracts, December 1994.
20.
Press, W. H., Teukolsky, S. A., Vetterling, W. T., and Flannery, B. P., Numerical Recipes in FORTRAN: The Art of Scientific Computing, second edition, Cambridge: Cambridge University Press, 1992.
21.
Powell, M. J. D., Algorithms for Nonlinear Constraints That Use Lagrangian Functions, Mathematical Programming, Vol. 14, pp. 224–248, 1978.
22.
VMCON, NESC No. 922.370, VMCON Tape Description, National Energy Software Center Note 81-29, March 23, 1981, NESC0922/01.
23.
Sundaresan, M., Ramaswamy, S., and Moore, R. M., Steam Reformer/Burner Integration and Analysis for an Indirect Methanol Fuel Cell Vehicle Fuel Processor, SAE Technical Paper Series 2001-01-0539, published by SAE International, Warrendale, PA, March 2001.
24.
Crane, R. C., Hilstrom, K. E., and Minkoff, M., Solution of the General Nonlinear Programming Problem with Subroutine VMCON, 1982.
25.
Kumar, R., Ahmed, S., Krumpelt, M., and Myles, K. M., Methanol Reformers For Fuel Cell Powered Vehicles: Some Design Considerations, paper #CONF-901106—3, December 1990.
26.
Yaws, C. L., Physical Properties—A Guide to the Physical, Thermodynamic, and Transport Property Data of Industrially Important Chemical Compounds, New York: McGraw-Hill, 1997.
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