Communication Dans Un Congrès Année : 2024

Investigating the Impact of Air Pollutants on Fuel Cell Performance and Durability: Experimental and Modelling Approaches

Résumé

Fuel cells hold immense promise as efficient and sustainable power sources for transportation and stationary applications. However, their operation can be severely impacted by air pollutants, particularly sulfur dioxide (SO2 ) and nitrogen oxides (NOx ). These pollutants can adsorb onto the platinum catalyst, leading to a decrease in fuel cell performance and durability. In this study, we investigate the impact of SO2 and NO 2 on PEM fuel cell performance and durability. The contamination tests were carried out at a constant current density of 0.5 A.cm−2 and consisted of four steps: a pre-poisoning step to evaluate initial performance (16 h), poisoning step (50 h), self- recovery in a pure air stream (20 h) and a driven CV-induced recovery. Electrochemical characterizations were carried out at the end of each step (Polarization curve, Electrochemical Impedance Spectroscopy, Cyclic Voltammetry and H2 Crossover). Figure 1 shows the effect of contaminating a single fuel cell with a low concentration of 0.5 ppm of sulfur dioxide (SO2 ). Remarkably, this resulted in a 29% decrease in cell voltage. Building on this foundation, our ongoing research aims to delve deeper into the impact of individual pollutant concentrations (SO2 and NO2 ) and their combined effects, considering varying temperatures and current densities to simulate real-world conditions. Simultaneously, a comprehensive model is being developed using Simscape in Matlab. The model accounts for the pollutants either as single-component gases or as a mixture. For single-component gas adsorption, the Langmuir Isotherm model is employed. To capture the competitive adsorption of SO2 and NO2 on platinum in gas mixtures, we are testing the Modified Competitive Langmuir Isotherm Model. The model will further be calibrated and validated using the experimental results. This combined experimental and modelling approach will provide a comprehensive understanding of the impact of air pollutants on fuel cell performance and durability. The insights gained from this study can inform the development of mitigation strategies and enhance the robustness of fuel cells in real- world applications as well as the sizing of a filter to reduce the effect of these pollutants

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Dates et versions

hal-04931838 , version 1 (06-02-2025)

Identifiants

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Ahmad Abd El Kader, Marielle Marchand, Pedro H. Affonso Nobrega, Christian Beauger. Investigating the Impact of Air Pollutants on Fuel Cell Performance and Durability: Experimental and Modelling Approaches. 20 th Symposium on Modeling and Experimental Validation Trafo Baden of Electrochemical Energy Technologies (ModVal 2024), Paul Scherrer Institut; Swiss Federal Office of Energy, Mar 2024, Baden, Switzerland. ⟨10.1149/MA2024-01362058mtgabs⟩. ⟨hal-04931838⟩
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