Mass transfer and pressure drop in ceramic foams: A description for different pore sizes and porosities

Garrido, Gerardo Incera; Patcas, F.; Lang, Sebastian; Kraushaar‐Czarnetzki, Bettina

doi:10.1016/j.ces.2008.06.015

Cited by 203 publications

(96 citation statements)

References 32 publications

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“…[1] In this general context, hierarchical porous materials used as supports are very attractive for the preparation of heterogeneous catalysts. Precise control of the porous structure at different length scales can not only reduce the limitation of mass transport to the active sites, [2,3] buta lso enable the formation of well-dispersed supported catalysts with high metallicsurfacea reas. [4] Among catalytic supports, inexpensive alumina has been extensively used in different catalytic applications, providing aw ide range of textural features, as well as thermala nd mechanical stability.…”

Section: Introductionmentioning

confidence: 99%

Correlation between Structural and Catalytic Properties of Copper Supported on Porous Alumina for the Ethanol Dehydrogenation Reaction

et al. 2015

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Carbon nanofibers (CNFs) were functionalized with aryl sulfonic acid groups using in situ diazonium coupling. The use of diazonium coupling yielded an acidic carbon material, in which the introduced acidic groups are readily accessible to the triglyceride substrate. The material is an efficient catalyst for the transesterification of triolein and methanol, outperforming conventional sulfonated carbons in both stability and activity per acid site. Upon comparing CNFs with varying degrees of functionalization, a linear correlation between sulfonic acid sites and catalytic performance was found.

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Section: Introductionmentioning

confidence: 99%

Correlation between Structural and Catalytic Properties of Copper Supported on Porous Alumina for the Ethanol Dehydrogenation Reaction

et al. 2015

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“…This method, however, cannot be used for ceramic foams because of the nature of the struts, as they feature a rough surface and may possess internal void volumes, which would lead to an overestimation of the specific surface area values. Recently, Grosse et al (2008) andIncera Garrido et al (2008) have used magnetic resonance imaging (MRI) to measure the specific surface area of ceramic foams. These authors investigated alumina foams with MRI.…”

Section: Introductionmentioning

confidence: 99%

Determining the specific surface area of ceramic foams: The tetrakaidecahedra model revisited

Inayat

Freund

Zeiser

et al. 2011

Chemical Engineering Science

129

108

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“…There are numerous methods of solid foam characterization, e.g., X-ray computer tomography (CT) [3][4][5], magnetic resonance imaging (MRI) [6], or microscopic methods [3,7]. The foam geometry can be modeled as a regular structure based on theoretical models like the cubic cell or Kelvin cell (for details see [5]) or as a real structure based on the CT reconstruction of real foam scans.…”

Section: Introductionmentioning

confidence: 99%

In Search of Governing Gas Flow Mechanism through Metal Solid Foams

et al. 2017

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Solid foams have been intensely studied as promising structured catalytic internals. However, mechanisms governing flow and transport phenomena within the foam structures have not been properly addressed in the literature. The aim of this study was to consider such flow mechanisms based on our experimental results on flow resistance. Two mechanisms were considered: developing laminar flow in a short capillary channel (flow-through model), and flow around an immersed solid body, either a cylinder or sphere (flow-around model). Flow resistance experiments were performed on three aluminum foams of 10, 20, and 40 PPI (pores per inch), using a 57 mm ID test column filled with the foams studied. The foam morphology was examined using microtomography and optical microscopy to derive the geometric parameters applied in the model equations. The flow-through model provided an accuracy of 25% for the experiments. The model channel diameter was the foam cell diameter, and the channel length was the strut thickness. The accuracy of the flow-around model was only slightly worse (35%). It was difficult to establish the geometry of the immersed solid body (sphere or cylinder) because experiment characteristics tended to change from sphere to cylinder with increasing PPI value.

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Mass transfer and pressure drop in ceramic foams: A description for different pore sizes and porosities

Cited by 203 publications

References 32 publications

Correlation between Structural and Catalytic Properties of Copper Supported on Porous Alumina for the Ethanol Dehydrogenation Reaction

Correlation between Structural and Catalytic Properties of Copper Supported on Porous Alumina for the Ethanol Dehydrogenation Reaction

Determining the specific surface area of ceramic foams: The tetrakaidecahedra model revisited

In Search of Governing Gas Flow Mechanism through Metal Solid Foams

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