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Journal ArticleDOI

The copper-catalyzed oxidation of graphite

01 Mar 1970-Carbon (Pergamon)-Vol. 8, Iss: 2, pp 131-139
TL;DR: The role of copper as a catalyst in the oxidation of graphite has been studied by optical microscopy and thermogravimetric analysis as mentioned in this paper, which suggests that the catalytic effect involves the localized reduction of cupric oxide by graphite and subsequent reoxidation of the resulting metal.
About: This article is published in Carbon.The article was published on 1970-03-01. It has received 96 citations till now. The article focuses on the topics: Copper oxide & Copper.
Citations
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Journal ArticleDOI
TL;DR: In this paper, the authors focus on the number of particles and the characteristics of them (size, composition) rather than the mass of the particles and their characteristics have a higher impact on health.
Abstract: During the last few decades, concerns have grown on the negative effects that diesel particulate matter has on health. Because of this, particulate emissions were subjected to restrictions and various emission-reduction technologies were developed. It is ironic that some of these technologies led to reductions in the legislated total particulate mass while neglecting the number of particles. Focusing on the mass is not necessarily correct, because it might well be that not the mass but the number of particles and the characteristics of them (size, composition) have a higher impact on health. To eliminate the threat of diesel particulate matter, essentially absolute filtration in combination with the oxidation of all emitted hydrocarbons is what will be required. After two decades of development, the first filters will soon be introduced on a large scale. Many different problems had to be overcome; it was especially important that the filter was robust and its regeneration was controllable. The key technol...

509 citations


Cites background from "The copper-catalyzed oxidation of g..."

  • ...McKee (153) reported that by forming an alloy, alumina can inhibit the catalytic action of copper during graphite oxidation....

    [...]

Journal ArticleDOI
TL;DR: In this article, a large number of candidate soot oxidation catalysts were screened on their catalytic activity with a model soot, and it was found that the intensity of contact between soot and catalyst is one of the major parameters that determine the soot oxidization rate.
Abstract: A large number of candidate soot oxidation catalysts were screened on their catalytic activity with a model soot. It was found that the intensity of contact between soot and catalyst is one of the major parameters that determine the soot oxidation rate. Two types of contact were studied; many catalysts increase the rate of soot oxidation considerably when the contact is intimate (‘tight’), whereas under conditions of poor (‘loose’) contact only some catalysts accelerate this oxidation reaction. It is tentatively suggested that (i) mobility of the catalyst is a major parameter determining the loose contact activity of catalysts and (ii) this mobility correlates with the melting point or the partial pressure of the catalyst.

341 citations

Journal ArticleDOI
01 Jan 1975-Carbon
TL;DR: In this paper, the catalytic effects of these salts during gasification of graphite in oxygen and carbon dioxide are interpreted on the basis of distinct oxidation-reduction cycles, involving the intermediate formation of peroxide in the former case and alkali metal in the latter.

234 citations

Journal ArticleDOI
01 Nov 1970-Carbon
TL;DR: In this paper, the oxides of a number of transition metals have been studied as catalysts for the oxidation of graphite by dry oxygen, and the localized action of the catalyst particles gave rise to catalytic channeling and/or the promotion of etch pit formation on the graphite basal plane.

223 citations

Journal ArticleDOI
01 Sep 2013-Energy
TL;DR: The most prevalent metal naturally in biomass char is potassium, which is not only inherently active, but volatilises to become finely distributed throughout the char mass as discussed by the authors, and the formation of an active carbon/potassium complex is frequently proposed.

206 citations


Cites background from "The copper-catalyzed oxidation of g..."

  • ...It was found [111] that larger copper oxide particles were immobile, but smaller ones in the 1e5 mm rangemoved rapidly on the basal plane of graphite, and cut channels by removing surface layers of carbon....

    [...]

References
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Book
01 Jan 1963

719 citations

Journal ArticleDOI
TL;DR: In this article, the etch patterns of colloidal metal particles placed on graphite single crystals catalyse the oxidation of graphite, but the catalysis occurs only at the metal-carbon interface.

92 citations

Journal ArticleDOI
01 Oct 1966-Carbon
TL;DR: In this article, the authors studied the catalytic effect of metal catalysts at such temperatures that the rate of the uncatalyzed reaction is negligible and showed that only metals able to oscillate between two degrees of oxidation, under the given conditions of combustion, do show a catalytic power.

70 citations

Journal ArticleDOI
TL;DR: In this article, the coadsorption and interaction of carbon monoxide and hydrogen on a series of unsupported noble metal catalysts was studied in the temperature range 100-200 °C.

68 citations

Journal ArticleDOI
01 Dec 1965-Carbon
TL;DR: In this paper, it was shown that the divalent state of the metal enters into the oxidation mechanism of the graphite in a manner similar to that proposed by Long and Sykes.

68 citations