A Novel internally heated Au/TiO2 carbon-carbon composite structured reactor for low-temperature CO oxidation

Hammer, Nina; Zarubova, S.; Kvande, Ingvar; Chen, De; Rønning, Magnus

doi:10.1007/bf03215586

Cited by 14 publications

(10 citation statements)

References 23 publications

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“…Titanium tetraisoproproxide Ti(OiPr) 4 was added dropwise to the carbon and an alkaline solution (distilled water with NH 4 OH added until pH reached 9) was used to fill the pores completely. The samples were dried at room temperature for 3 h followed by drying in an oven at 100°C for 12 h. The Au sol was prepared by reduction of chloroaurate(III) ions in a partially hydrolysed tetrakis(hydroxymethyl)-phosphonium chloride solution following the same procedure as reported [20,22]. The samples were calcined at different stages of the preparation.…”

Section: Deposition Of Metalsmentioning

confidence: 99%

“…A closer description of the reactor is given elsewhere [22]. The reactor was heated by the Joule effect by introducing a current through the carbon material.…”

Section: Activity Measurementsmentioning

confidence: 99%

“…The aim of this work is to study Au/TiO 2 structured catalysts thermally treated at different stages during the preparation and how hydrogen in the feed influences the catalytic activity of CO oxidation. The carbon material is not only used as a support but also to provide heat to the reaction by the Joule effect by introducing a current through the material [22]. In this paper the impact of the morphology of TiO 2 in Au/TiO 2 supported on CNF grown on CF to obtain a structured catalyst for CO oxidation in the presence and absence of hydrogen is discussed.…”

Section: Introductionmentioning

confidence: 99%

“…We have earlier shown that carbon is able to perturb the TiO 2 structure [20] when Au/TiO 2 catalysts are supported on carbon nanofibres (CNF). The Au/TiO 2 /CNF catalysts show promising stability in the water-gas shift reaction and CO oxidation [21,22]. The use of CNF as a powder has obvious limitations.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Pretreatment on Carbon-Supported Au/TiO2 Catalysts for Preferential Oxidation of CO

et al. 2011

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The impact of thermal treatment at various preparation stages of carbon supported Au/TiO 2 catalysts prior to oxidation of CO in the presence and absence of hydrogen was studied. An increase in catalytic activity for thermally treated samples due to a more ordered structure of TiO 2 was observed. A reversible deactivation of the catalysts occurred in the absence of hydrogen. However, the activity was restored at preferential CO oxidation conditions in presence of hydrogen.

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Section: Deposition Of Metalsmentioning

confidence: 99%

“…A closer description of the reactor is given elsewhere [22]. The reactor was heated by the Joule effect by introducing a current through the carbon material.…”

Section: Activity Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Pretreatment on Carbon-Supported Au/TiO2 Catalysts for Preferential Oxidation of CO

et al. 2011

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“…Thus, the preparation of structured devices incorporating gold catalysts is clearly a challenge topic with interesting foreseeing applications. In this sense, several papers have been published using Au/CeO 2 [3,7,11,12,[15][16][17][18][19][20][21][22] in oxidation reactions such as preferential (PROX) and total (TOX) oxidation of CO. In most of those works, AISI 304 stainless steel was the selected substrate to prepare the monoliths.…”

Section: Introductionmentioning

confidence: 99%

Au/CeO2 metallic monolith catalysts: influence of the metallic substrate

et al. 2013

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Ceria-based gold catalysts were successfully deposited on ferritic stainless steel (Fecralloy) and aluminium monoliths. The prepared monolithic and reference powder catalysts were characterized by means of S BET , X-ray diffraction, glow discharge optical emission spectroscopy and scanning electron microscopy-energy dispersive X-ray analysis techniques and tested in the CO oxidation reaction. Characterization results put in evidence the diffusion of cations from the catalytic layer on the surface of the monoliths to the metallic oxide scale and inversely, from the oxide scale to the catalysts, thus altering the catalytic formulation and affecting the CO oxidation properties of the catalytic device. The extension and nature of the modifications produced depend on the nature of the catalysts and the metallic substrate, as well as the reaction conditions applied. These facts must be considered when gold catalysts are supported on metallic-structured devices.

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Fischer–Tropsch Synthesis on Hierarchically Structured Cobalt Nanoparticle/Carbon Nanofiber/Carbon Felt Composites

et al. 2011

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The hierarchically structured carbon nanofibers (CNFs)/carbon felt composites, in which CNFs were directly grown on the surface of microfibers in carbon felt, forming a CNF layer on a micrometer range that completely covers the microfiber surfaces, were tested as a novel support material for cobalt nanoparticles in the highly exothermic Fischer-Tropsch (F-T) synthesis. A compact, fixed-bed reactor, made of disks of such composite materials, offered the advantages of improved heat and mass transfer, relatively low pressure drop, and safe handling of immobilized CNFs. An efficient 3-D thermal conductive network in the composite provided a relatively uniform temperature profile, whereas the open structure of the CNF layer afforded an almost 100 % effectiveness of Co nanoparticles in the F-T synthesis in the fixed bed. The greatly improved mass and heat transport makes the compact reactor attractive for applications in the conversion of biomass, coal, and natural gas to liquids.

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A Novel internally heated Au/TiO2 carbon-carbon composite structured reactor for low-temperature CO oxidation

Cited by 14 publications

References 23 publications

Effect of Pretreatment on Carbon-Supported Au/TiO2 Catalysts for Preferential Oxidation of CO

Effect of Pretreatment on Carbon-Supported Au/TiO2 Catalysts for Preferential Oxidation of CO

Au/CeO2 metallic monolith catalysts: influence of the metallic substrate

Fischer–Tropsch Synthesis on Hierarchically Structured Cobalt Nanoparticle/Carbon Nanofiber/Carbon Felt Composites

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