RT Journal Article
T1 Effects of Ammonia Impurities on the Hydrogen Flow in High and Low Temperature Polymer Electrolyte Fuel Cells
A1 Isorna Llerena, Fernando
A1 Heras Jiménez, Ainhoa de las
A1 López González, Eduardo
A1 Segura Manzano, Francisca
A1 Andújar Márquez, José Manuel
AB Fuel cells are a promising technology to use as a source of electricity and heat for buildings, and as an electrical power source for electric motors propelling vehicles. They consume hydrogen as fuel and oxygen to produce electricity, heat and water. Conventional fuels, such as natural gas, methanol, or even gasoline are reformed to produce the hydrogen required by the fuel cells. During the reforming process, impurities are inevitably obtained in the hydrogen flow. One of them is ammonia (NH3) that can result in serious damage to the fuel cell operation. In this paper, the effects produced by different concentrations of NH3 present in the hydrogen flow on the membrane electrode assembly (MEA) performance are studied, differentiating between irreversible and recoverable damages. Strictly experimental, the study includes both low and high temperature polymer electrolyte fuel cells (PEFC). The NH3 poisoning effect is analyzed and quantified by comparing the polarization curves. After the poisoning stage, the cells are subjected to a regeneration process (feeding the cell with neat H2) with the aim of knowing the membrane's recovery capacity. The experimental results demonstrate that in low temperature (LT)-PEFCs, the cell recovers its performance almost completely with a new exposure to neat H2, in spite of the damage previously caused by the presence of traces of NH3 in the anode feed stream. In contrast, in high temperature (HT)-PEFCs, the cell suffers irreversible damage, even with short time exposure to NH3. The paper concludes with discussing the possible chemical interactions by which NH3 affects the cell performance.
PB Wiley
SN 1615-6846
SN 1615-6854 (electrónico)
YR 2019
FD 2019
LK http://hdl.handle.net/10272/20832
UL http://hdl.handle.net/10272/20832
LA eng
NO Isorna Llerena, F., de las Heras Jiménez, A., López González, E., Segura Manzano, F., & Andújar Márquez, J. M. (2019). Effects of Ammonia Impurities on the Hydrogen Flow in High and Low Temperature Polymer Electrolyte Fuel Cells. In Fuel Cells (Vol. 19, Issue 6, pp. 651–662). Wiley. https://doi.org/10.1002/fuce.201900031
NO This work is a contribution of the DPI2017-85540-R Projectsupported by the Spanish Ministry of Economy and Competitivenessand by the European Union Regional DevelopmentFund.
DS Repositorio Institucional de la Universidad de Huelva
RD 14 jul 2026