Site‐specific Surface Chemistry on Nanotubes

Burghaus, U.; Zak, A.; Rosentsveig, Rita

doi:10.1002/ijch.201000060

Cited by 3 publications

References 27 publications

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Characterization of Ni‐Coated WS₂ Nanotubes for Hydrodesulfurization Catalysis

Komarneni

Burghaus

et al. 2012

Israel Journal of Chemistry

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A reactivity screening of new nano‐hydrodesulfurization (HDS) catalysts was conducted using an ambient pressure flow reactor as well as ultra‐high vacuum kinetics techniques. Thiophene was used as a probe molecule. Clean multiwall WS2 nanotubes (INT‐WS2) as well as Ni‐ and Co‐coated INT‐WS2 were considered. In addition, undoped MoS2 and Re‐doped nanoparticles with fullerene‐like structures were studied. Commercial Ni and Co HDS catalysts from Haldor Topsoe (Denmark) as well as “nano MoS2” from Impex Corp. (USA) were considered as reference materials. The lab‐synthesized and commercial systems broke down thiophene into quite similar non‐sulfur containing products, as identified by a gas chromatograph. The Ni and Co promoted catalysts showed similar thiophene conversion rates. Although the commercial catalysts had larger thiophene conversion rates than the laboratory‐synthesized systems, the Re‐doped nano‐HDS catalyst showed quite low rates of formation of H2S, an undesirable by‐product.

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Characterization of Ni‐Coated WS₂ Nanotubes for Hydrodesulfurization Catalysis

Komarneni

Burghaus

et al. 2012

Israel Journal of Chemistry

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Butane Adsorption on Silica Supported MoOx Clusters Nanofabricated by Electron Beam Lithography

Shan

Chakradhar

Anderson

et al. 2013

ACS Symposium Series

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REACTIVITY AND MORPHOLOGY OFNi,Mo, ANDNi–MoOXIDE CLUSTERS SUPPORTED ON MCM-48 TOWARD THIOPHENE HYDRODESULPHURIZATION

et al. 2014

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In this paper, the morphology, chemical composition and reactivity of MCM-48 powders impregnated with Ni , Mo or both toward hydrodesulphurization (HDS) of thiophene were characterized. The reactivity of the catalyst was quantitatively compared with a standard industrial catalyst (from HaldorTopsoe, Denmark) and a novel WS 2 nanotube-based catalysts (from R. Tenne, Israel). Morphology and chemical composition were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), and EDX elemental maps. Reactivity was determined in a gas-chromatograph based mini flow reactor using thiophene as a probe molecule. The sulfided MCM-48 supported Mo catalyst showed the largest HDS activity with turnover frequencies (TOF) about half as large as for the commercial system under the test conditions used here. Presulfiding did increase activity of all MCM-48 catalysts.

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Site‐specific Surface Chemistry on Nanotubes

Cited by 3 publications

References 27 publications

Characterization of Ni‐Coated WS₂ Nanotubes for Hydrodesulfurization Catalysis

Characterization of Ni‐Coated WS₂ Nanotubes for Hydrodesulfurization Catalysis

Butane Adsorption on Silica Supported MoOx Clusters Nanofabricated by Electron Beam Lithography

REACTIVITY AND MORPHOLOGY OFNi,Mo, ANDNi–MoOXIDE CLUSTERS SUPPORTED ON MCM-48 TOWARD THIOPHENE HYDRODESULPHURIZATION

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Site‐specific Surface Chemistry on Nanotubes

Cited by 3 publications

References 27 publications

Characterization of Ni‐Coated WS2 Nanotubes for Hydrodesulfurization Catalysis

Characterization of Ni‐Coated WS2 Nanotubes for Hydrodesulfurization Catalysis

Butane Adsorption on Silica Supported MoOx Clusters Nanofabricated by Electron Beam Lithography

REACTIVITY AND MORPHOLOGY OFNi,Mo, ANDNi–MoOXIDE CLUSTERS SUPPORTED ON MCM-48 TOWARD THIOPHENE HYDRODESULPHURIZATION

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Characterization of Ni‐Coated WS₂ Nanotubes for Hydrodesulfurization Catalysis

Characterization of Ni‐Coated WS₂ Nanotubes for Hydrodesulfurization Catalysis