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FeCrAl as a Catalyst Support
Gianluca Pauletto1,2, Angelo Vaccari3, Gianpiero Groppi4
1Chemical Engineering Department, École Polytechnique de Montréal, 2900 Boulevard Édourd-Montpetit, Montréal H3T 1J4, Canada.
Chemical Reviews
|July 1, 2020
Summary
Iron-chromium-aluminum (FeCrAl) alloys offer superior support for high-temperature reactions, enhancing yield through improved heat and mass transfer. Their robust structure and protective aluminum oxide layer enable operation in harsh conditions, with applications in burners and converters.
Area of Science:
- Materials Science
- Chemical Engineering
- Catalysis
Background:
- Iron-chromium-aluminum (FeCrAl) alloys are critical for high-temperature chemical processes (>700 °C).
- Low heat/mass transfer and aggressive environments limit reaction yields in conventional supports.
- FeCrAl offers unique structural and thermal properties for demanding applications.
Purpose of the Study:
- To review the preparation, operating conditions, and performance of FeCrAl supports.
- To highlight the advantages and challenges of using FeCrAl in catalysis.
- To explore current and future applications of FeCrAl structured networks.
Main Methods:
- Review of literature on FeCrAl alloy preparation techniques.
- Analysis of process conditions and catalyst performance data for various reactions.
- Evaluation of structural properties (networks, foams, fibers) and thermal conductivity.
Main Results:
- FeCrAl structured networks (monoliths, foams, fibers) maximize mass transfer and minimize thermal gradients.
- A protective Al2O3 surface layer enhances resistance to corrosive atmospheres and carburization.
- Open structures provide low pressure drop and high void fraction.
Conclusions:
- FeCrAl alloys are exceptional supports for high-temperature, aggressive chemical reactions.
- Key applications include industrial burners and automotive converters, with future potential in H2 and syngas production.
- FeCrAl offers a robust solution for enhancing catalytic reaction efficiency and durability.
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