Methanol steam reforming over Cu/SiC catalysts.

Tomoda, Akihiko; Mikami, Daisuke; Azuma, Naoto; Ueno, Akifumi

doi:10.2978/jsas.13.414

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Copper on SiC (Cu/SiC) has been pioneered by a Japanese team at the beginning of this century as an effective catalyst for the methanol (CH 3 OH) steam reforming (eq ). …”

Section: Catalytic Applicationsmentioning

confidence: 99%

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

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There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics (e.g. Al2O3, SiO2, TiO2, and aluminosilicates–zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. For instance, oxides are easily corroded by acids or bases, and carbon is not resistant to oxidation. Therefore, these carriers cannot be recycled. Moreover, the poor thermal conductivity of metal oxide carriers often translates into permanent alterations of the catalyst active sites (i.e. metal active-phase sintering) that compromise the catalyst performance and its lifetime on run. Therefore, the development of new carriers for the design and synthesis of advanced functional catalytic materials and processes is an urgent priority for the heterogeneous catalysis of the future. Silicon carbide (SiC) is a non-oxide semiconductor with unique chemicophysical properties that make it highly attractive in several branches of catalysis. Accordingly, the past decade has witnessed a large increase of reports dedicated to the design of SiC-based catalysts, also in light of a steadily growing portfolio of porous SiC materials covering a wide range of well-controlled pore structure and surface properties. This review article provides a comprehensive overview on the synthesis and use of macro/mesoporous SiC materials in catalysis, stressing their unique features for the design of efficient, cost-effective, and easy to scale-up heterogeneous catalysts, outlining their success where other and more classical oxide-based supports failed. All applications of SiC in catalysis will be reviewed from the perspective of a given chemical reaction, highlighting all improvements rising from the use of SiC in terms of activity, selectivity, and process sustainability. We feel that the experienced viewpoint of SiC-based catalyst producers and end users (these authors) and their critical presentation of a comprehensive overview on the applications of SiC in catalysis will help the readership to create its own opinion on the central role of SiC for the future of heterogeneous catalysis.

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“…Copper on SiC (Cu/SiC) has been pioneered by a Japanese team at the beginning of this century as an effective catalyst for the methanol (CH 3 OH) steam reforming (eq ). …”

Section: Catalytic Applicationsmentioning

confidence: 99%

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

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“…[7][8][9][10][11][12][13] Although such preparation methods are known and specific surface areas of several hundred square meters per gram have been reported, SiC has been used as a support only in some applications so far, and usually the materials were not porous and so had low specific surface areas (≪100 m 2 g −1 ). [14][15][16][17][18][19][20][21][22][23][24][25][26] Nevertheless, a performance increase in the propane oxidative dehydrogenation was reported by Xu and co-workers compared to conventional supports of alumina or silica. These observations were explained by the higher heat conductivity of SiC which avoided a hot spot formation in that exothermic reaction.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous silicon carbide as nickel support for the carbon dioxide reforming of methane

Hoffmann

Plate

Steinbrück

et al. 2015

Catal. Sci. Technol.

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Fumed silica is used as a template in the nanocasting approach towards nanoporous silicon carbide, and it can then be applied as a catalyst support. By varying the pyrolysis temperature between 1000 and 1500°C, the structural parameters of the resulting silicon carbide materials DUT-87 (DUT = Dresden University of Technology) can be controlled. A specific surface of 328 m2 g-1 is obtained. Furthermore, the oxidation behaviour of such nanoporous SiCs is investigated. The materials are distinguished by an impressive thermal stability at 900°C for at least 12 h, which is allowed by the presence of a passive oxidation even for such highly porous SiCs. Hence, nickel (10 wt%) was supported on the fresh DUT-87 as well as controlled oxidized DUT-87preox samples, and the influence of the different support properties on the characteristics of the catalyst samples which are used in the carbon dioxide reforming of methane was investigated. The SiO2 layer on the SiC for the DUT-87preox samples could prevent the formation of nickel silicide to a large extent at temperatures up to 850°C. This resulted in higher activities during the dry reforming of methane at 800°C and the performance of the siliceous supports was significantly exceeded, emphasizing the beneficial effect of SiC. Effective methane reaction rates of 1.2 mmol g-1 s-1 were obtained for KPK1ox which was based on DUT-87 pyrolysed at 1300°C and oxidative treatment prior to nickel insertion. Furthermore, a stable conversion level was reached over the whole time on stream of 8 h

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“…as abrasive, solar thermal absorber, hot gas and molten metal filter or mechanical parts) . Furthermore, some investigations were made to use silicon carbide as catalyst support: Silicon carbide has been used for instance as support in the oxidation of CO, the selective oxidation of hydrogen sulfide to sulfur, the partial oxidation of methane, the steam reforming of methanol, the oxidative propane dehydration, the direct oxidation of butane to maleic anhydride, the Fischer‐Tropsch synthesis and the dry reforming of methane . It could be demonstrated by Xu et al, that using SiC instead of the common γ‐alumina or silicon oxide supports results in enhanced catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous and Highly Active Silicon Carbide Supported CeO₂‐Catalysts for the Methane Oxidation Reaction

Hoffmann

Biemelt

Lohe

et al. 2013

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CeOx@SiO2 nanoparticles are used for the first time for the generation of porous SiC materials with tailored pore diameter in the mesopore range containing encapsulated and catalytically active CeO2 nanoparticles. The nanocasting approach with a preceramic polymer and subsequent pyrolysis is performed at 1300 °C, selective leaching of the siliceous part results in CeOx/SiC catalysts with remarkable characteristics like monodisperse, spherical pores and specific surface areas of up to 438 m2·g−1. Porous SiC materials are promising supports for high temperature applications. The catalysts show excellent activities in the oxidation of methane with onset temperatures of the reaction 270 K below the onset of the homogeneous reaction. The synthesis scheme using core‐shell particles is suited to functionalize silicon carbide with a high degree of stabilization of the active nanoparticles against sintering in the core of the template even at pyrolysis temperatures of 1300 °C rendering the novel synthesis principle as an attractive approach for a wide range of catalytic reactions.

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Methanol steam reforming over Cu/SiC catalysts.

Cited by 4 publications

References 2 publications

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Nanoporous silicon carbide as nickel support for the carbon dioxide reforming of methane

Nanoporous and Highly Active Silicon Carbide Supported CeO₂‐Catalysts for the Methane Oxidation Reaction

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Methanol steam reforming over Cu/SiC catalysts.

Cited by 4 publications

References 2 publications

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Nanoporous silicon carbide as nickel support for the carbon dioxide reforming of methane

Nanoporous and Highly Active Silicon Carbide Supported CeO2‐Catalysts for the Methane Oxidation Reaction

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Nanoporous and Highly Active Silicon Carbide Supported CeO₂‐Catalysts for the Methane Oxidation Reaction