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Diameters in the range 40–300 nm for vapor-grown carbon nanofibers (VGCNFs) can be tailored using synthesis parameters with a floating catalyst method at temperatures of 1373–1473 K in the presence of sulfur. The VGCNFs obtained are found to be very pure and straight, and have uniform...
The development of mesoscopic texture, which describes the structural units 10–100 nm in size, at the transverse skin area in mesophase pitch-based carbon fibers as a result of heat-treatment were examined using a high resolution scanning electron microscope (HR-SEM). The graphitized carbon...
Fluid behavior of carbonaceous pitch materials, such as A240 and ARA-24, is evaluated using the high-temperature, high-pressure (HTHP) viscometer. The measured viscosity of A240 pitch using the HTHP viscometer shows excellent agreement with that obtained using a Brookfield viscometer (DV III+)....
We present in this paper a new original process for fullerenes production consisting of treating carbon powders through a 3-phase thermal plasma. The main difference with the classical arc process is that the input carbon rate, not limited to the electrodes erosion, can be independently...
An effective production of pure vapor-grown carbon nanofibers (VGCNFs) was obtained at the temperature of 1373–1473 K in the presence of sulfur by an improved floating catalyst method in a horizontal reactor using benzene as carbon source, ferrocene as catalyst precursor and hydrogen as carrier...
The enthalpy of immersion of carbons into water reflects the specific and the non-specific interactions between the liquid and the solid. The study of a variety of active carbons oxidized to different degrees with (NH 4 ) 2 S 2 O 8 , HNO 3 and H 2 O 2 , reveals a simple correlation between the...
A refuse derived fuel (RDF) was carbonized by partial combustion at 623 K and the carbonized RDF (cRDF) was steam-activated at 1123 K. The cRDF was also treated by 3.3 or 5.2 N nitric acid at a boiling temperature for 3 h prior to the steam-activation. Porous properties of the activated carbons...
Porous carbons with high porosities were prepared from phenol–formaldehyde resins using chemical and physical activation methods. The resin precursor employed was synthesized with an initial formaldehyde-to-phenol ratio of 1.33 by mole. The chemical activation process consisted of KOH...
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