Monolithic catalyst supports with foam structure

Leonov, A. N.; Smorygo, Oleg; Sheleg, V. K.

doi:10.1007/bf02475687

Cited by 21 publications

(19 citation statements)

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“…One of them, nickel foam, was produced by PUF electroplating, and the second, ceramic foam, by PUF replication with a ceramic suspension. Details of both processes applied in the study were described previously [14]. PUFs with nominal cell densities 10, 15, 20 and 30 ppi were used to manufacture both types of foams.…”

Section: Manufacturing Of the Foamsmentioning

confidence: 99%

“…a packed bed of hypothetical spherical granules with the specific surface equal to the foam specific surface area [13]; an array of cubic cells with rectangular [14] or round [15] pores; a system of cylindrical channels [16]; a sequence of bottlenecks along the flow path [17]; and an array of tetradecahedral cells with triangular struts [18]. Detailed reviews of the approaches to the simulation of open-cell foam structures are given in [17,19].…”

Section: Introductionmentioning

confidence: 99%

“…Since the actual foam structures are too complex for calculations, simplified pore structure models are usually applied [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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An inverted spherical model of an open-cell foam structure

et al. 2011

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Section: Manufacturing Of the Foamsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An inverted spherical model of an open-cell foam structure

et al. 2011

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“…Initially, open-cell nickel foam is synthesized by the replication of polyurethane foam followed by sintering in the reducing atmosphere [10]. temperature -600 o C; testing duration -500-1000 h; contact load (to fix the not brazed samples between the interconnector plates) -0.5 kg/cm 2 .…”

Section: The Substrate Pore Structurementioning

confidence: 99%

Porous substrates for intermediate temperature SOFCs and in-cell reforming catalysts

Smorygo

Садыков

Mikutski

et al. 2013

Catalysis for Sustainable Energy

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The paper reviews results of development of new composite foam substrates with the graded structure for the intermediate temperature SOFC and structured catalysts of fuels reforming. Ni-Al substrates with porosity of 60-80% were prepared by compressive deformation of open cell metal foams followed by pack aluminizing. Testing in corrosive media revealed advantages of Ni-Al substrates over Fechraloy ones. Button-size thin film solid oxide fuel cell supported on this substrate demonstrated promising performance in the intermediate temperature range. These substrates were shown to be compatible with nanocomposite active components for the fuel reforming comprised of Ni-based alloys strongly interacting with perovskite/fluorite complex oxides with a high oxygen mobility and reactivity. High activity and coking stability of these structured catalysts in steam/autothermal reforming of natural gas, ethanol and acetone was demonstrated without a remarkable impact of heat and mass transfer. A close performance was demonstrated for fuel cells operating on wet H 2 or in the mode of internal reforming of natural gas using these catalysts. A concept of the substrate with the graded pore structure and composition was offered.

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“…These small particles are often supported on an inert substrate for ease of handling and to immobilize the particles, preventing them from moving with the gas or liquid flow streams. A number of materials are used as the monolithic catalyst supports [21][22][23][24]. Recent attention has turned to the use of submicron fibers as catalyst support due to their high surface area, flexibility, and flow-through pore structures that make it easy for the reactants to reach the catalyst particles [24][25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Temperature on NO–CO Decomposition by Pd Catalyst Nanoparticles Supported on Alumina Nanofibers

Shin

Abutaleb

Lolla

2017

Fibers

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Abstract:In this work, palladium (Pd) nanoparticles were blended into a solution of a sacrificial polymer and an aluminum sol gel precursor to form alumina fibers containing the palladium particles. The polymer solution was electrospun into template submicron fibers. These fibers were calcined at temperatures between 650 • C and 1150 • C to remove the polymer and oxidize the aluminum. The internal crystalline morphologies of the calcined fibers transformed with change in the calcination temperature. The calcined fibers were formed into fibrous mats and further tested for their catalytic performances. The Pd particles had a size ranging from 5-20 nm and appeared randomly distributed within and near the surfaces of the alumina fibers. The final metal loading of all Pd/Al 2 O 3 samples ranged from 4.7 wt % to 5.1 wt %. As calcination temperature increased the alumina crystal structure changed from amorphous at 650 • C to alpha crystal structure at 1150 • C. With the increase of calcination temperature, the average fiber diameters and specific surface areas decreased. The catalyst supported fiber media had good conversion of NO and CO gases. Higher calcination temperatures led to higher reaction temperatures from 250 to about 450 • C for total conversion, indicating the effective reactivity of the fiber-supported catalysts decreased with increase in calcination temperature. The fibers formed at the 650 • C calcination temperature had the highest reaction activity.

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Monolithic catalyst supports with foam structure

Cited by 21 publications

References 0 publications

An inverted spherical model of an open-cell foam structure

An inverted spherical model of an open-cell foam structure

Porous substrates for intermediate temperature SOFCs and in-cell reforming catalysts

Effect of Calcination Temperature on NO–CO Decomposition by Pd Catalyst Nanoparticles Supported on Alumina Nanofibers

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