The iron-chromium-aluminum alloy (FeCrAl) is an exceptional support for highly exothermic and endothermic reactions that operate above 700 °C in chemically aggressive environments, where low heat and mass transfer rates limit reaction yield. FeCrAl two- and three-dimensional structured networks—monoliths, foams, and fibers—maximize mass transfer rates, while their remarkable thermal conductivity minimizes hot spots and thermal gradients. Another advantage of the open FeCrAl structure is the low pressure drop due to the high void fraction and regularity of the internal path. The surface Al₂O₃ layer, formed after an initial thermal oxidation, supports a wide range of metal and metal oxide active phases. The aluminum oxide that adheres to the metal surface protects it from corrosive atmospheres and carbon (carburization), thus allowing FeCrAl to operate at a higher temperature. The top applications are industrial burners, in which compact knitted metal fibers distribute heat over large surface areas, and automotive tail gas converters. Future applications include producing H₂ and syngas from remote natural gas in modular units. This Review summarizes the specific preparation techniques, details process operating conditions and catalyst performance of several classes of reactions, and highlights positive and challenging aspects of FeCrAl.

中文翻译：

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FeCrAl作为催化剂载体。

铁铬铝合金（FeCrAl）是在化学侵蚀性环境中高放热和吸热反应的极佳载体，该反应在700°C以上的环境中进行，低热和传质速率限制了反应收率。FeCrAl二维和三维结构化网络（整料，泡沫和纤维）可最大程度地提高传质速率，而其卓越的导热性可最大程度地减少热点和热梯度。FeCrAl开放结构的另一个优点是由于高空隙率和内部路径的规律性而导致的低压降。表面Al ₂ O ₃初始热氧化后形成的有机层可支持多种金属和金属氧化物活性相。附着在金属表面的氧化铝可保护其免受腐蚀性气氛和碳（碳化）的影响，从而使FeCrAl可以在更高的温度下运行。最高的应用是工业燃烧器，其中紧凑的编织金属纤维将热量分布在较大的表面积上，还用于汽车尾气转换器。未来的应用包括以模块化单元的方式从偏远天然气生产H ₂和合成气。这篇综述总结了具体的制备技术，详细介绍了几种反应类别的工艺操作条件和催化剂性能，并重点介绍了FeCrAl的积极和具有挑战性的方面。