0 1 Solid fuels (derived solid fuels)
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Development of bio-briquette and technology transfer to developing countries Kamide, M. Eco Ind., 1997, 2, (7) 28-34. (In Japanese) Comprised of pulverized coal, biomass and lime as a desulfurizer if necessary, the bio-briquette, or bio-coal, represents a promising alternative for kerosene or firewood, of which excess uses are to be limited in view of conservation of natural resources and environment.
After the manufacturing process is briefly described, its combustion characteristics are presented, including good ignition, stable and clean burning with much less emission of smoke, SO, and NO,. The technological transfer of the biobriquette to developing countries is under development.
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Effect of addition of boron carbide on the graphitization and oxidation resistance of raw cokes Youm, H. N. et al. Yoop Hokhoechi, 1997, 34, (4). 413-419. (In Korean) Additions of O-25 wt% B4C to cokes were carried out to produce specimens that were subsequently sintered in Ar atmosphere at 2200°C. The effects of B4C content on graphitization and oxidation resistance of cokes were investigated. B4C accelerates the graphitization of cokes and at 2200°C the degree of graphitization increased from 0.33 which is the value of pure carbon to 0.56, which increased bulk density and porosity. Bending strength increased as the graphitization temperature increased. Oxidation resistance property was greatly improved when B4C was added at > 10 wt% at 800°C and at 220 wt% at 1000°C. A thin layer of BzOs glass phase on the surface of the composite was identified to increase the oxidation resistance.