Direct oxidation of H2S into S. New catalysts and processes based on SiC support

Keller, Nicolas; Pham‐Huu, Cuong; Crouzet, Claude; Ledoux, Marc J.; Savin-Poncet, Sabine; Nougayrede, J.; Bousquet, Jacques

doi:10.1016/s0920-5861(99)00141-8

Cited by 69 publications

(31 citation statements)

References 4 publications

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“…The catalyst was NiS 2 with a metal loading of 5 wt.%. Details of the catalyst preparation and characterisation can be found in previous articles dealing with this reaction [47,48]. The catalytic performance of the NiS 2 /CNF catalyst was also compared to those of the NiS 2 /SiC in grain form.…”

Section: Selective Oxidation Of H 2 S Into Elemental Sulfurmentioning

confidence: 99%

Carbon nanomaterials with controlled macroscopic shapes as new catalytic materials

Pham‐Huu

Ledoux

2006

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Section: Selective Oxidation Of H 2 S Into Elemental Sulfurmentioning

confidence: 99%

Carbon nanomaterials with controlled macroscopic shapes as new catalytic materials

Pham‐Huu

Ledoux

2006

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“…The loop can be explained by slow gas diffusion into the lesser accessible inner regions of the particles [23]. This lack of accessibility could be due to incompletely removed surfactant (see 13 C NMR). However, in the precipitated sample in which F127 is also partially removed [10], a much higher S BET is observed.…”

Section: Characterization Of Surfactant-extracted Pmo Particlesmentioning

confidence: 99%

Aerosol-generated mesoporous silicon oxycarbide particles

Pauletti

Moskowitz

Millan

et al. 2009

Pure and Applied Chemistry

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Aerosol-generated mesoporous organosilica submicronic spheres have been converted into porous silicon oxycarbide (SiCO) glasses by pyrolysis at 1000 °C in an inert atmosphere. Spherical mesoporous particles obtained from acidic solutions of 1,2-bis(triethoxysilyl)ethane and Pluronic ® F127 structuring agent were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N 2 adsorption/desorption, and multi nuclear solid-state magic-angle spinning (MAS) NMR. These particles were then pyrolyzed at 1000 °C and transformed into a SiCO phase as evidenced by 29 Si MAS NMR, while TEM shows preserved mesoporosity, unfortunately difficult to access owing to the presence of an outer layer of dense silica.

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“…The family of PMOs exhibits some outstanding features: i) simultaneous presence of Si-C and Si-O bonds ii) ordered mesoporosity that can be tuned by changing the synthetic parameters (nature of surfactant, precursor, pH...) iii) high surface area and pore volume. Combination of the high temperature properties of SiCO networks with the possibility to tune the porous structure in terms of topology and pore volume could be useful to design porous silicon oxycarbide glasses for applications in domains like catalysis 24) and separation techniques 25) when severe operating conditions are required.…”

Section: )-20)mentioning

confidence: 99%

A new example of periodic mesoporous SiCO glasses with cubic symmetry stable at 1000.DEG.C

Pauletti

Handjani

Fernandez-Martin

et al. 2008

J. Ceram. Soc. Japan

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Periodic Mesoporous Organosilicas (PMOs) have been used as precursors to produce porous Silicon Oxycarbide glasses after pyrolysis at 1000°C in inert atmosphere. Up to now only PMOs with cubic ordering could be successfully converted into an ordered mesoporous SiCO glass. In our work we prepared, under strong acidic media and using an inorganic salt, a PMO with cubic Fm3m phase starting from 1,2-bis(triethoxysilyl)ethane as organosilane and PluronicF127 as templating agent. The as-prepared PMO has been characterized by XRD (Synchrotron beamline), N 2 adsorption/desorption and multinuclear solid state NMR ( 29 Si, 13 C). After pyrolysis under argon flow the Fm3m phase is retained and the sample still displays a high surface area of 260 m 2 /g. Further characterizations were performed by 29 Si MAS NMR and at 1000°C the product can be described as a true SiCO glass with mixed SiC x O 4-x units (0x4).

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Direct oxidation of H2S into S. New catalysts and processes based on SiC support

Cited by 69 publications

References 4 publications

Carbon nanomaterials with controlled macroscopic shapes as new catalytic materials

Carbon nanomaterials with controlled macroscopic shapes as new catalytic materials

Aerosol-generated mesoporous silicon oxycarbide particles

A new example of periodic mesoporous SiCO glasses with cubic symmetry stable at 1000.DEG.C

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