Application of metallic foams in an electrochemical pulsed flow reactor Part I: Mass transfer performance

Cognet, Patrick; Berlan, J.; Lacoste, G.; Fabre, Paul-Louis; Jud, Jacob

doi:10.1007/bf00242537

Cited by 28 publications

(19 citation statements)

References 20 publications

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“…[1] Open-cell foams have also found wide use strain behavior observed in compressed polymeric foams in the electrochemical industry. [3,4] The recent development has been simulated by this energy approach. Furthermore, of a variety of processes for making metallic foams with significant work has been done by Simone et al [28] and other improved properties at lower cost has led to increased interresearchers [28][29][30][31][32][33][34] to examine effects of the local structure and est in their use in engineering components.…”

Section: Introductionmentioning

confidence: 99%

“…There is, therefore, a need for studies designed to provide insights into the influence of strut micro- (produced by ERG, Oakland, CA) were studied. Foams with The microstructures of struts of the different foams were also Compression (GPa) 69 Density (g/cm 3 ) 2.69 examined using SEM and energy-dispersive spectroscopy (EDS). These were used to characterize the compositions of individual phases.…”

Section: Introductionmentioning

confidence: 99%

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An investigation of the microstructure and strength of open-cell 6101 aluminum foams

Zhou

Mercer

Soboyejo

2002

Metall Mater Trans A

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This article presents the results of a study of the microstructure and strength of open-cell 6101 aluminum alloy fans with three different levels of pore size (measured in pores per inch (PPI)). The macrostructures and microstructures of open-cell foam struts are characterized using a combination of optical and scanning electron microscopy (SEM). The compositions of the individual phases are also determined via energy-dispersive spectroscopy (EDS). The variations in strut microhardness are then measured using Vickers microindentation techniques. Following the measurement of the mechanical properties of foams, a modified model is used to estimate the relative density from measured strut dimensions. The mechanisms of compressive deformation are then elucidated before presenting a discussion on unit-cell modeling, strut plastic deformation, and the relationships between strut microstructure and microhardness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An investigation of the microstructure and strength of open-cell 6101 aluminum foams

Zhou

Mercer

Soboyejo

2002

Metall Mater Trans A

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“…A survey of the literature shows a large number of papers dealing with the characterization of several materials used as three-dimensional electrodes, particularly metallic foams [3][4][5][6][7] . However, we have found few papers dealing with the study of the properties of carbon felts, in spite of its attractive characteristics and applications [8][9][10][11] (i.e.…”

mentioning

confidence: 99%

Characterization of a carbon felt electrode: structural and physical properties

González-Garcı́a¹,

Bonete²,

Expósito³

et al. 1999

J. Mater. Chem.

136

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The aim of this paper is the characterization of a carbon felt (Le Carbone Lorraine, RVC 4002) to be used as three-dimensional electrode. A wide group of very different techniques were used in the physical and structural characterization of this material. Both, structural (porosity, mean pore radius, specific surface area, tortuosity) and physical properties (permeability, electrical resistance) were determined by using mercury porosimetry, adsorption isotherm analysis, a filamentary analog procedure and liquid permeametry (pressure drop method). The results obtained from the modelling of the hydrodynamic behaviour, from previous work, were also applied here. The carbon felt studied was found to have a porosity around 0.98, a specific surface area of 22100-22700 m -1 , 2.7 10 -3 Ω m electrical resistivity and a tortuosity between 5 and 6. The comparison of these results with those found in the literature for other similar materials, used as three-dimensional electrodes, highlights the attractions of this

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“…Due to acetonation, carbohydrate functional groups are initially protected from oxidation, in which case the reaction selectivity increases. The initial functional groups must, however, be recovered after oxidation, resulting in remarkable loss of endproduct [90,91] . For the commercial Pt/C (5% Pt) catalyst, this provides only 28 - on activated carbon or alumina.…”

Section: Oxidation With Catalytic Nanoparticlesmentioning

confidence: 99%

Nanoparticulate Catalysts Based on Nanostructured Polymers

Bronstein

Matveeva

Sulman

2007

Nanoparticles and Catalysis

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The catalytic nanoparticles possess unique catalytic properties due to their large surface area and considerable number of surface atoms leading to an increased amount of active sites [1 -3] . The catalytic properties of nanoparticles depend on the nanoparticle size, nanoparticle size distribution, and nanoparticle environment [4] . Moreover, the surface of nanoparticles plays an important role in catalysis, being responsible for their selectivity and activity. As was demonstrated in the last decade, the formation of nanoparticles in a nanostructured polymeric environment allows enhanced control over nanoparticle characteristics, yet the stabilizing polymer (its functionality) is of great importance, determining the state of the nanoparticle surface [5 -8] .Recently, catalytic nanoparticles formed in various types of nanostructured polymers have been extensively studied in major catalytic reactions [5 -7] . Although traditional polymer -based catalysts may be faulted by such shortcomings as uncontrolled swelling or poor accessibility of nanoparticles in the polymer bulk, the nanostructured polymers are mainly free from these limitations due to the small size of the nanoparticle -containing zones. Moreover, some swelling can even be advantageous, providing better access to the nanoparticle surface. The majority of nanostructured polymers for catalytic applications are amphiphilic block copolymers and dendrimers while some other polymers have also been explored. The ability of amphiphilic block copolymers to form micelles in dilute solutions in selective solvents [9, 10] has been used to stabilize catalytic nanoparticles in the functionalized micelle cores [11,12] . Pd nanoparticles formed in PS -b -P4VP micelles were used as a catalyst for the cross -coupling reaction between aryl halides and alkenes (Heck reaction) [12] . These hybrid systems exhibited nearly the same effi ciency as low -molecular -mass palladium complexes (conventional catalysts of the Heck reaction), being at the same time much more stable. The PS -b -P4VP micelles containing Pd and Pd/Au nanoparticles were studied in the hydrogenation of cyclohexene, 1,3 -cyclooctadiene, and 1,3 -cyclohexadiene [11] . A strong infl uence of the synthetic pathway to form nanoparticles and the type of 93 Nanoparticles and Catalysis. Edited by Didier Astruc

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Application of metallic foams in an electrochemical pulsed flow reactor Part I: Mass transfer performance

Cited by 28 publications

References 20 publications

An investigation of the microstructure and strength of open-cell 6101 aluminum foams

An investigation of the microstructure and strength of open-cell 6101 aluminum foams

Characterization of a carbon felt electrode: structural and physical properties

Nanoparticulate Catalysts Based on Nanostructured Polymers

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