Publication

Mitigating Cr Contamination by Hot Air Filtering in Solid Oxide Fuel Cells

Christian Ludwig, Jan Van Herle, Aïcha Hessler-Wyser, Josef Andreas Schuler
2011
Journal Articles

Abstract

Cr contamination, generated by system components located upstream a solid oxide fuel cell (SOFC) and responsible for Cr-poisoning induced air electrode performance degradation, must be suppressed by hindering the access of Cr pollutants to the cathode compartment. For this purpose, we developed an air filter, based on a (La,Sr)CoO3-coated ceramic foam, which was evaluated on its Cr-trapping potential within an SOFC system. An in-situ measurement based on a novel hot air sampling technique indicated a 7-fold decrease of the Cr contaminating level after the installation of a Cr getter filter, which should significantly extend SOFC lifetime.

Official source

https://infoscience.epfl.ch/entities/publication/03a0015b-a39e-42ce-8ad3-6944747f5510

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Christian Ludwig, Jan Van Herle, Aïcha Hessler-Wyser, Josef Andreas Schuler
2011
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/03a0015b-a39e-42ce-8ad3-6944747f5510

About this result

Related concepts (10)

Solid oxide fuel cell

A solid oxide fuel cell (or SOFC) is an electrochemical conversion device that produces electricity directly from oxidizing a fuel. Fuel cells are characterized by their electrolyte material; the SOFC has a solid oxide or ceramic electrolyte. Advantages of this class of fuel cells include high combined heat and power efficiency, long-term stability, fuel flexibility, low emissions, and relatively low cost. The largest disadvantage is the high operating temperature which results in longer start-up times and mechanical and chemical compatibility issues.

Fuel cell

A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (often hydrogen) and an oxidizing agent (often oxygen) into electricity through a pair of redox reactions. Fuel cells are different from most batteries in requiring a continuous source of fuel and oxygen (usually from air) to sustain the chemical reaction, whereas in a battery the chemical energy usually comes from substances that are already present in the battery. Fuel cells can produce electricity continuously for as long as fuel and oxygen are supplied.

Alkaline fuel cell

The alkaline fuel cell (AFC), also known as the Bacon fuel cell after its British inventor, Francis Thomas Bacon, is one of the most developed fuel cell technologies. Alkaline fuel cells consume hydrogen and pure oxygen, to produce potable water, heat, and electricity. They are among the most efficient fuel cells, having the potential to reach 70%. NASA has used alkaline fuel cells since the mid-1960s, in the Apollo-series missions and on the Space Shuttle. The fuel cell produces power through a redox reaction between hydrogen and oxygen.

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