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Onion-like fullerenes (OLFs) were synthesized in high yields from coal by radio frequency plasma. The morphologies and structures of the products were characterized by high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) technique. Results reveal that OLFs can be prepared from coal with high purity. The particles display a clear polyhedral or quasi-spherical morphology...
Bituminous chars with a strongly non-uniform porous structure have not been accounted for in existing pore models used to predict reactivity. A new approach has been developed to predict a particle structure parameter used in the random pore model. The reaction rate has been correlated with the carbon burn-off. Six bituminous coal chars were produced by pyrolysis in a pressurised drop tube furnace...
Char fragmentation during pulverized coal combustion was studied using an Australian bituminous coal. The coal was combusted with air in a drop tube furnace at a gas temperature of 1300 o C. The char samples were collected at different levels of char burnout, and their structure was examined using scanning electron microscopy. Approximately 40% of the char particles formed after pyrolysis...
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