Microfibrous entrapped Ni/Al2O3 using SS‐316 fibers for H2 production from NH3

Liu, Ye; Wang, Hong; Li, Jian‐Feng; Lu, Yong; Xue, Qunji; Chen, Jinchun

doi:10.1002/aic.11208

Cited by 55 publications

(45 citation statements)

References 13 publications

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“…Our previous microfibrous composites with entrapment of preferential oxidation (PROX) CO catalyst particulates and with entrapment of H 2 S sorbent particulates for hydrogen fuel cleanup in proton exchange membrane fuel cell (PEMFC) applications do both provide a 3-fold or more promotion of bed utilization efficiency. [17][18][19][20] These approaches also lead to significant reduction of the overall reaction bed weight and volume compared to the packed beds with 1-2 mm dia. catalyst/sorbent pellets.…”

Section: Introductionmentioning

confidence: 96%

“…[17][18][19][20] More interestingly, such microfibrous structure, with unique form factors, can be made into thin sheets (from submillimeter to several millimetres in thickness) of large area and/or pleated sheet structure to control pressure drop and contacting efficiency in a beneficial manner different from other traditionally employed contacting schemes including packed beds, fluid beds, honeycomb monoliths or wovens. 17,18 Accordingly, it is safe to say that the microfibrous structure is an excellent and promising technology for the development of high-performance catalysts (or new-type microfibous bed reactor), especially for the strongly endothermic or exothermic reactions. Metal network structure definitely possesses the excellent thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…15,16 This approach has been extensively applied to develop high-efficiency miniature H 2 generator for fuel cell power supplies. [17][18][19][20] This microfibrous structure provides large void volume, entirely open structure, large surface-to-volume ratio, high permeability, high thermal conductivity and unique form factors. For applications that entrap small particles within or load active components (e.g., metals) on the microfibrous network, unique combinations of surface area, pore size/particle size, thermal conductivity, and large void volume are obtained.…”

Section: Introductionmentioning

confidence: 99%

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Novel microfibrous‐structured silver catalyst for high efficiency gas‐phase oxidation of alcohols

et al. 2009

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Novel microfibrous-structured silver catalysts were developed for gas-phase selective oxidation of mono-/aromatic-/di-alcohols. Sinter-locked three-dimensional microfibrous networks consisting of 5 vol % 8-lm-Ni (or 12-lm-SS-316L) fibers and 95 vol % void volume were built up by the papermaking/sintering processes. Silver was then deposited onto the surface of the sinter-locked fibers by incipient wetness impregnation method. At relatively low temperatures (e.g., 380C), the microfibrous-structured silver catalysts provided quite higher activity/selectivity compared to the electrolytic silver. The microfibrous Ag/Ni-fiber offered much better low-temperature activity than the Ag/ SS-fiber. The interaction at Ag particles and Ni-fiber interface not only visibly increased the active/selective sites of Ag þ ions and Ag n dþ clusters but also significantly promoted their low-temperature reducibility and ability for O 2 activation. In addition, the microfibrous structure provided a unique combination of large void volume, entirely open structure, high thermal conductivity and high permeability. V

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel microfibrous‐structured silver catalyst for high efficiency gas‐phase oxidation of alcohols

et al. 2009

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Section: Introductionmentioning

confidence: 99%

“…Therefore, the research related to the new type of PMFSF helps to enrich the entire system of porous metal materials. As part of a new generation of high-performance structural and functional materials, the PMFSFs have been widely used in many fields, including catalyst supports [9][10][11], heat exchangers [12,13], porous metal electrodes [14], energysaving heat pipes [15,16], clean energy convertors [17], surface combustion technology [18], shock absorbers [19], high temperature gas dust removal [20], automotive exhaust purification [21], fuel cells [6,22], biomedicine [23], high temperature seal and wear-resistant components [24], and so on.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Fabrication Process of Porous Metal Fiber Sintered Felts with Three-Dimensional Reticulated Structure

Tang

Zhou

Xiang

et al. 2010

Materials and Manufacturing Processes

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A novel porous metal fiber sintered felt (PMFSF) with a three-dimensional reticulated structure has been produced by the solid-state sintering of copper fibers. The copper fibers, with several microstructures distributed onto the surface, were fabricated using the cutting method. The Scanning Electron Microscope (SEM) results revealed that there were two kinds of sintering joints present in the PMFSFs: fiber-to-fiber surface contact and crossing fiber meshing. In the sintering process, the surface microstructures of the fibers helped to improve the forming process of the PMFSFs, as a result of high surface energy. Furthermore, the effect of different sintering parameters on the forming process of the PMFSFs was studied in detail, including the sintering temperature and holding time. The sintering temperatures had a significant influence on the surface microstructures of single fiber and specific surface area of the PMFSFs, but the holding time did not. The optimal PMFSF with a three-dimensional reticulated structure and larger specific surface area was produced by sintering copper fibers at 800 C for 30 minutes in the reduction atmosphere.Keywords Copper fiber; Metal fiber sintered felt; Porous metal; Sintering. IntroductionPorous metal material, an interesting engineering material with excellent performances, is being explored due to its porous structure and unique properties. In recent years, porous metal materials have been widely used in aerospace, metallurgic, mechanic, petrochemical, energy, pharmaceutical, architectural, and transportation fields [1][2][3][4][5]. Porous metal fiber sintered felts (PMFSFs), made from metal fibers, attract increasing attention, because of their three-dimensional reticulated structure, interconnected pores, high porosity, and large specific surface area [6][7][8]. These structural characteristics create potential to overcome the shortfalls of other porous materials. For example, porous organic polymer materials have low intensity and cannot withstand high temperature; porous ceramics have poor brittleness and bad thermal shock resistance; metal wire mesh are easily destroyed and plugged; sintered powder materials are fragile, and often fail to allow a sufficient amount of liquid to pass through. Therefore, the research related to the new type of PMFSF helps to enrich the entire system of porous metal materials. As part of a new generation of high-performance structural and functional materials, the PMFSFs have been widely used in many fields, including catalyst supports [9][10][11]

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Galvanic deposition of silver on 80‐μm‐Cu‐fiber for gas‐phase oxidation of alcohols

Zhao

Zhang

et al. 2014

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com) Microstructured Ag-based catalysts were developed by galvanically depositing Ag onto 80-lm-Cu-fibers for the gas-phase oxidation of alcohols. By taking advantages including large voidage, open porous structure and high heat/mass transfer, as-made catalysts provided a nice combination of high activity/selectivity and enhanced heat transfer. The best catalyst was Ag-10/80-Cu-fiber-400 (Ag-loading: 10 wt%; Cu-fiber pretreated at 400 C in air), being effective for oxidizing acyclic, benzylic and polynary alcohols. For benzyl alcohol, conversion of 94% was achieved with 99% selectivity to benzaldehyde at 300 C using a high WHSV of 20 h 21. Computational fluid dynamics (CFD) calculation and experimental result illustrated significant enhancement of the heat transfer. The temperature difference from reactor wall to central line was about 10-20 C for the Ag-10/80-Cu-fiber-400, much lower than that of 100-110 C for the Ag-10-Cu-2/Al 2 O 3 at equivalent conversion and selectivity. Synergistic interaction between Cu 2 O and Ag was discussed, being assignable to the activity improvement.

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Microfibrous entrapped Ni/Al₂O₃ using SS‐316 fibers for H₂ production from NH₃

Cited by 55 publications

References 13 publications

Novel microfibrous‐structured silver catalyst for high efficiency gas‐phase oxidation of alcohols

Novel microfibrous‐structured silver catalyst for high efficiency gas‐phase oxidation of alcohols

An Innovative Fabrication Process of Porous Metal Fiber Sintered Felts with Three-Dimensional Reticulated Structure

Galvanic deposition of silver on 80‐μm‐Cu‐fiber for gas‐phase oxidation of alcohols

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