In order to synthesize uniform spherical platinum particle with about 1 μm in diameter by wet process, Pd nanoparticles were prepared and applied for seed particles. Firstly, by using Pd seed nanoparticles and the control of additive conditions of platinum chloride salts and reductant, uniform spherical platinum particles up to 0.8 μm in diameter were obtained. In the second stage, Pt layer was coated on the prepared spherical Pt particles in order to enlarge the Pt particle size was uniformly, and it was possible to increase the size of uniform spherical Pt particles from 0.8 to 1.2 μm in diameter. The size of uniform Pt spherical particle was able to be controlled ranging from 0.4 to 1.2 μm in diameter by using above process.

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Inorganic / polymer composite particles are widely used and have attractive applications such as inks and paints, cosmetic, drug delivery system etc. In this study, electrospray method was firstly used to prepare monodispersed SiO₂ / Poly-methyl methacrylate (PMMA) composite particles. SiO₂ particles and PMMA were used as model material. A field emission scanning electron microscopy (SEM) was used to characterize the particles. The SEM analysis revealed that the produced SiO₂ / PMMA composite particles were non-agglomerated and monodispersed. It was found that the flow rate and concentration ratio of SiO₂ particles to PMMA polymer, as well as the SiO₂ particle size led to change morphology of the composite particles.

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Idemitsu coal assessment system and numerical computer simulation of coal combustion have been developed for energy saving and improvement of efficiency on pulverized coal combustion plant. They are based on coal evaluation technologies which have been investigated at Idemitsu Coal & Environment Research Laboratory. Features of these technologies are described in this report.

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