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Parametric Analysis of a High Temperature PEM Fuel Cell Based Microcogeneration System. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2016. [DOI: 10.1155/2016/4596251] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This study focuses on performance analysis of a 1 kWemicrocogeneration system based on a high temperature proton exchange membrane (HT-PEM) fuel cell by means of parametric investigation. A mathematical model for a system consisting of a fuel processor (steam reforming reactor and water-gas shift reactor), a HT-PEM fuel cell stack, and the balance-of-plant components was developed. Firstly, the fuel processor performance at different fuel ratios and equivalence ratio was examined. It is shown that high fuel ratios of 0.9–0.95 and equivalence ratios of less than 0.56 are suitable for acceptable carbon monoxide content in the synthetic gas produced. Secondly, a parametric study of the system performance at different fuel and equivalence ratios using key system operating parameters was conducted. Steam-to-carbon ratio, stack operating temperature, and anode stoichiometry were varied to observe the changes in the microcogeneration system. The analysis shows that the system can reach electrical and cogeneration efficiencies of 30% and 84%, respectively.
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Abstract
AbstractThe heterogeneous catalytic ignition of lean to stoichiometric n-butane/air mixtures were studied at various total pressures between 10 and 100 kPa and at temperatures equal to or larger than the critical ignition temperatures. The induction periods, ignition and extinction temperatures were measured under strict isothermal conditions. The discussion presented in this paper is based on several literature models. The data analysis allowed for the determination of the overall kinetic parameters. The rigorous isothermal conditions indicated that the extinction temperatures are lower than the ignition, a behavior different from the results obtained in stagnation-point flow reactors.
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Taylor JD, Allendorf MD, McDaniel AH, Rice SF. In Situ Diagnostics and Modeling of Methane Catalytic Partial Oxidation on Pt in a Stagnation-Flow Reactor. Ind Eng Chem Res 2003. [DOI: 10.1021/ie020934r] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joshua D. Taylor
- Combustion Research Facility, Sandia National Laboratories, MS 9052, P.O. Box 969, Livermore, California 94551-0969
| | - Mark D. Allendorf
- Combustion Research Facility, Sandia National Laboratories, MS 9052, P.O. Box 969, Livermore, California 94551-0969
| | - Anthony H. McDaniel
- Combustion Research Facility, Sandia National Laboratories, MS 9052, P.O. Box 969, Livermore, California 94551-0969
| | - Steven F. Rice
- Combustion Research Facility, Sandia National Laboratories, MS 9052, P.O. Box 969, Livermore, California 94551-0969
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Mantzaras J, Appel C, Benz P, Dogwiler U. Numerical modelling of turbulent catalytically stabilized channel flow combustion. Catal Today 2000. [DOI: 10.1016/s0920-5861(00)00268-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Hoyle N, Kumarasamy P, Self V, Sermon P, Vong M. Catalysis of H2, CO and alkane oxidation–combustion over Pt/Silica catalysts: evidence of coupling and promotion. Catal Today 1999. [DOI: 10.1016/s0168-1923(98)00108-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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