H. Timmermann
Karlsruhe Institute of Technology
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Publication
Featured researches published by H. Timmermann.
Journal of The Electrochemical Society | 2008
H. Timmermann; W. Sawady; D. Campbell; André Weber; R. Reimert; Ellen Ivers-Tiffée
The influence of hydrocarbon-containing fuel gases on cell performance and coke formation is investigated in this work, wherein acetylene is applied as a model compound for the coke formation. The dependence of coke yield on acetylene amount (volume fraction of 0.05-0.50%) and gas composition is analyzed. Further parameters which are varied are temperature (650-850°C) and operation time. It is shown that the mass of coke that is formed on the cell depends strongly on acetylene volume fraction and temperature. As a consequence, acetylene has a severe influence on the electrical cell performance, and acetylene concentration and temperature can be correlated to degradation effects.
10th International Symposium on Solid Oxide Fuel Cells (SOFC-X) | 2007
H. Timmermann; Walter Sawady; Dennis Campbell; André Weber; R. Reimert; Ellen Ivers-Tiffée
The influence of hydrocarbons containing fuel gases on cell performance and coke formation is investigated in this work, wherein acetylene is applied as model compound for the coke formation. The dependence of coke yield on acetylene amount (volume fraction of 0.05% to 0.50%) and gas composition is analyzed. Further parameters, which are varied, are temperature (650 {degree sign}C to 850 {degree sign}C) and operation time. It could be shown, that the mass of coke, that is formed on the cell, depends strongly on acetylene volume fraction and temperature. As a consequence acetylene has a severe influence on the electrical cell performance and acetylene concentration and temperature can be correlated to degradation effects.
Journal of Power Sources | 2010
M. Ettler; H. Timmermann; Jürgen Malzbender; André Weber; Norbert H. Menzler
Journal of Power Sources | 2010
H. Timmermann; W. Sawady; R. Reimert; Ellen Ivers-Tiffée
Fuel Cells | 2006
H. Timmermann; D. Fouquet; André Weber; Ellen Ivers-Tiffée; U. Hennings; R. Reimert
Handbook of Fuel Cells | 2010
Ellen Ivers-Tiffée; H. Timmermann; André Leonide; Norbert H. Menzler; J. Malzbender
217th ECS Meeting | 2010
Alexander Kromp; André Leonide; H. Timmermann; André Weber; Ellen Ivers-Tiffée
Solid oxide fuel cells IX (SOFC-IX): proceedings of the international symposium, papers presented at the Ninth International Symposium on Solid Oxide Fuel Cells, held in Quebec City, Canada, May 15 - 20, 2005, Vol. 1. Ed.: S. C. Singhal | 2005
Ellen Ivers-Tiffée; H. Timmermann; D. Fouquet; U. Hennings; R. Reimert
Chemie Ingenieur Technik | 2007
W. Sawady; H. Timmermann; R. Reimert; Ellen Ivers-Tiffée
International symposium on solid oxide fuel cells | 2006
H. Timmermann; Daniel Fouquet; U. Hennings; Ellen Ivers-Tiffe; R. Reimert
