The Neck to Particle Ratio Effect on the Mechanical and Morphological Sintering Features of Porous Stainless Steel (SS) Hollow Fibers

Schmeda‐Lopez, Diego R.; Nunes, Eduardo H.M.; Vasconcelos, Daniela C.L.; Vasconcelos, Wander L.; Meulenberg, Wilhelm Albert; Costa, João C. Diniz da

doi:10.1002/adem.201800045

Cited by 4 publications

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References 30 publications

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“…The importance of the porous substrate is to provide the mechanical strength otherwise not available in thin films. Many inorganic materials such as ceramics [20][21][22] and stainless steel [23][24][25] have been manufactured as porous substrates, though alumina is the most used material due to lower costs and processing versatility. Porous substrates come in several geometries such as tubes, [14,[26][27][28] hollow fibers, [29][30][31] and flat surfaces.…”

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Manufacture of Highly Porous Tubular Alumina Substrates with Anisotropic Pore Structure by Freeze‐Casting

et al. 2020

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Porous substrates play a major role in devices requiring the flow of fluids such as in filters and membranes. Porous substrates are also extensively used for the preparation of inorganic membranes for microfiltration, [1][2][3] desalination, [4][5][6][7] gas separation, [8][9][10][11] and percrystallization processes. [12,13] These inorganic membranes are known as asymmetric membranes as they are conventionally prepared by coating ceramic [14][15][16] or carbon [17][18][19] thin films as top layers on porous substrates. The importance of the porous substrate is to provide the mechanical strength otherwise not available in thin films. Many inorganic materials such as ceramics [20][21][22] and stainless steel [23][24][25] have been manufactured as porous substrates, though alumina is the most used material due to lower costs and processing versatility. Porous substrates come in several geometries such as tubes, [14,[26][27][28] hollow fibers, [29][30][31] and flat surfaces. [19,32] Traditionally, inorganic porous substrates are prepared from conventional ceramic processes such as slip-casting, [33,34] extrusion, [35,36] dry pressing, [37] tapecasting, [38][39][40] and phase inversion hollow fibers. [41,42] A relatively more recent method is the freeze-casting technique for processing porous ceramic substrates. [43][44][45][46] Due to the ability of forming an aligned pore structure, this technique can overcome problems associated with lower fluid fluxes conferred by conventional ceramic processing methods such as tortuous pore structure, constrictions, and dead-end and isolated pores. [47] Freeze-cast starts with the preparation of a stable ceramic suspension (or slurry) at normal conditions followed by controlled freezing of the solvent of the ceramic

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confidence: 99%

Manufacture of Highly Porous Tubular Alumina Substrates with Anisotropic Pore Structure by Freeze‐Casting

et al. 2020

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“…Alternatively, hollow fibers (~1.8 mm outer diameter, ~0.5 mm thick, ~50 mm long) were prepared by dry-wet spinning at 2 bar. In the case of hollow fibers, this process is also known as phase � � � � inversion, as water coagulates the polymeric binder [58,59]. The coagulation is essential to maintain the hollow fiber geometry during spinning.…”

Section: Substratesmentioning

confidence: 99%

Silicon carbide filters and porous membranes: A review of processing, properties, performance and application

Hotza

Luccio

Wilhelm

et al. 2020

Journal of Membrane Science

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Silicon carbide (SiC) filters and porous membranes is a growing industry with deployment for gas and liquid separation processes. In view of its importance, the research efforts into the development of SiC filters and membranes are of growing interest around the world. Therefore, this review paper is focused on the latest advancements in SiC and SiC composites used for the preparation of substrates and thin films in filters and membranes. There is a multitude of methods used to prepare filters and membranes of different shapes (tubular, honeycomb, flat sheets and multi-channel), which are influenced by precursor mixture and sintering conditions. In turn, these processing conditions affect porosity and pore size, which affects the transport and separation properties of SiC filters and membranes. SiC particles size and distribution allow for the precise control of pore size in membranes, leading to high gas separation factors. In addition, SiC has strong thermal stability properties that are very desirable for high temperature gas cleaning. Together with gas and liquid transport and separation properties, this review also addresses the potential applications in gas and liquid separation processes, coupled with thermal/chemical stability properties. Future challenges are highlighted towards further research efforts.

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“…New configurations of membrane reactors and innovative reaction routes have also contributed to the development of membrane reactors. Inorganic membranes, including metals, ceramics, zeolites, glasses, and carbon, are commonly used in CMRs [ 11 , 12 , 13 , 14 ]. These membranes typically consist of multiple layers of single–phase or composite materials.…”

Section: Introductionmentioning

confidence: 99%

Ion–Conducting Ceramic Membrane Reactors for the Conversion of Chemicals

et al. 2023

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Ion–conducting ceramic membranes, such as mixed oxygen ionic and electronic conducting (MIEC) membranes and mixed proton–electron conducting (MPEC) membranes, have the potential for absolute selectivity for specific gases at high temperatures. By utilizing these membranes in membrane reactors, it is possible to combine reaction and separation processes into one unit, leading to a reduction in by–product formation and enabling the use of thermal effects to achieve efficient and sustainable chemical production. As a result, membrane reactors show great promise in the production of various chemicals and fuels. This paper provides an overview of recent developments in dense ceramic catalytic membrane reactors and their potential for chemical production. This review covers different types of membrane reactors and their principles, advantages, disadvantages, and key issues. The paper also discusses the configuration and design of catalytic membrane reactors. Finally, the paper offers insights into the challenges of scaling up membrane reactors from experimental stages to practical applications.

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The Neck to Particle Ratio Effect on the Mechanical and Morphological Sintering Features of Porous Stainless Steel (SS) Hollow Fibers

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

Cited by 4 publications

References 30 publications

Manufacture of Highly Porous Tubular Alumina Substrates with Anisotropic Pore Structure by Freeze‐Casting

Manufacture of Highly Porous Tubular Alumina Substrates with Anisotropic Pore Structure by Freeze‐Casting

Silicon carbide filters and porous membranes: A review of processing, properties, performance and application

Ion–Conducting Ceramic Membrane Reactors for the Conversion of Chemicals

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