Effects of particle size and forming pressure on pore properties of Fe-Cr-Al porous metal by pressureless sintering

Koo, Bonuk; Yi, Yu-Jeong; Lee, Min‐Jeong; Kim, Byoung-Kee

doi:10.1007/s12540-017-6689-6

Cited by 7 publications

(5 citation statements)

References 13 publications

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“…Yttrium prevents high-temperature phase changes as it oxidizes first during the synthesis steps; therefore, the melting steps require vacuum furnaces, which impacts the final cost of the material . The ductility of FeCrAl makes it easy to shape into monoliths, fibers, foams, and porous materials. , The most common structures are monoliths followed by foams and fibers, and all are suitable for fixed-bed reactors (Figure ). Changing temperatures (during process start-up and shut-down, for example) dilates the materials that would crack the surface coating if it were not for the mechanical characteristics that release the stress.…”

Section: Introductionmentioning

confidence: 99%

FeCrAl as a Catalyst Support

et al. 2020

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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 Al 2 O 3 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 H 2 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.

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Section: Introductionmentioning

confidence: 99%

FeCrAl as a Catalyst Support

et al. 2020

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“…FeCrAlloy is highly ductile and can be molded into various shapes including wires, plates, monoliths, and foams. 37,38 FeCrAl materials can operate at temperatures as high as 1400 °C, about 200 °C higher than operating temperature limits for Ni-containing alloys. Microalloying with yttrium helps provide high strength and creep resistance.…”

Section: Metallic Alloysmentioning

confidence: 97%

“…As discussed later in section , the formation of this alumina overlayer also aids in improving adhesion between the alloy surface and various oxide catalyst powders. FeCrAlloy is highly ductile and can be molded into various shapes including wires, plates, monoliths, and foams. , FeCrAl materials can operate at temperatures as high as 1400 °C, about 200 °C higher than operating temperature limits for Ni-containing alloys. Microalloying with yttrium helps provide high strength and creep resistance .…”

Section: Types Of Heating Element Materialsmentioning

confidence: 99%

Electrified Catalysts for Endothermic Chemical Processes: Materials Needs, Advances, and Challenges

Idamakanti,

Ledesma,

Ratnakar

et al. 2023

ACS Eng. Au

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Large-scale endothermic chemical processes, as currently practiced, employ tubular reactors that are heated externally through the combustion of fossil fuels, and are highly carbon-intensive. Joule-heated reactors in which electric currents flowing through the catalyst are used to provide thermal energy directly through internal heating are rapidly emerging as an alternative to these conventional, externally heated reactors. Jouleheated reactors could help significantly improve modularity and also reduce the capital, energy, and carbon footprint associated with these enthalpically demanding processes. Development of these novel types of reactors, however, is predicated on overcoming catalyst design challenges encountered uniquely when supplying heat through the use of electric currents passing through catalyst substrates. We review herein some key advancements in catalyst design that have been achieved in the recent past, and highlight considerations critical to the novel mode of reactor operation proposed. We provide an overview of the various types of electrically heated catalysts proposed, methods used in their synthesis, and reactor performance of Joule-heated catalysts for a variety of applications. Also discussed are key knowledge gaps that will likely need to be addressed in an effort to accelerate deployment of this emerging class of reactors that could play a pivotal role in the decarbonization of energy-intensive large-scale chemical processes.

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“…As the first barrier in a nuclear fuel, the choice of an accident tolerant fuel (ATF) is a very important issue in the field of nuclear fuel development [ 17 ]. After the Fukushima accident, there has been an urgent need to develop suitable fuel cladding materials to meet the performance requirements under severe accident conditions, which will, thereby, greatly improve the accident tolerance capabilities of future nuclear power plants [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al [ 13 ] used the Monte Carlo calculation tool Serpent and fuel performance program BISON from INL to perform neutronics and fuel performance analyses of ATF. The research results show that the application of FeCrAl cladding material can significantly improve the cladding performance, such as flattening the axial temperature distribution and delaying the gap closure [ 17 ]. Additionally, hydrogen permeability was obtained for several FeCrAl alloys using a static permeation platform.…”

Section: Introductionmentioning

confidence: 99%

Influence of TIG and Laser Welding Processes of Fe-10Cr-4Al-RE Alloy Cracks Overlayed on 316L Steel Plate

Liu

et al. 2022

Materials

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In this paper, the possibility of applying different welding strategies to overlay an FeCrAl layer against corrosion from heavy liquid metal on a plain plate made of 316L austenitic stainless steel was investigated. This technology could be used in manufacturing the main vessel of CiADS, which may be considered as a more economic and feasible solution than production with the corrosion-resistant FeCrAl alloy directly. The main operational parameters of the laser welding process, including laser power, weld wire feeding speed, diameter of the welding wire, etc., were adjusted correspondingly to the optimized mechanical properties of the welded plate. After performing the standard nuclear-grade bending tests, it can be preliminarily confirmed that the low-power pulse laser with specific operational parameters and an enhanced cooling strategy will be suitable to surface an Fe-10Cr-4Al-RE layer with a thickness of approximately 1 mm on a 40 mm-thick 316L stainless steel plate, thanks to the upgraded mechanical properties incurred by refined grains with a maximum size of around 300 μm in the welded layer.

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Effects of particle size and forming pressure on pore properties of Fe-Cr-Al porous metal by pressureless sintering

Cited by 7 publications

References 13 publications

FeCrAl as a Catalyst Support

FeCrAl as a Catalyst Support

Electrified Catalysts for Endothermic Chemical Processes: Materials Needs, Advances, and Challenges

Influence of TIG and Laser Welding Processes of Fe-10Cr-4Al-RE Alloy Cracks Overlayed on 316L Steel Plate

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