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Activated carbons (ACs) were produced by a one step process with CO2 as the physical activation agent at 800°C. The ACs were further activated chemically using KOH, HNO3 or CH3COOH and heat-treated at 300 or 600°C for 1 or 2h to modify their properties. The effect of CO2 concentration, activation time, types of chemical agents and the post heat-treatment conditions on CO2 capture were investigated...
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 gas. It was found that higher than 30 wt.% of the carbon source from benzene can be transformed to VGCNFs...
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 diameter within each batch for certain parameters. A lower molar ratio of C/H, appropriate molar ratio of S/C, and...
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