Journal of the Japan Institute of Energy
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ONLINE ISSN: 1882-6121
PRINT ISSN: 0916-8753

Journal of the Japan Institute of Energy Vol. 84 (2005), No. 3

  • Numerical Simulation of MHD Power Generation Systems Using ICF Reactor

    pp. 235-241

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    DOI:10.3775/jie.84.235

    It is known that fusion reactions are fueled by deuterium and tritium, which are found easily in water and are known as unlimited energy resource, would release enormous energy for driving power generation system. The aim of this study is to examine and compare the plant efficiency of power generation systems using magnethydrodynamic (MHD) generator, Gas Turbine (GT), Steam Turbine (ST) and Inertial Confine-ment Fusion (ICF) reactor as heat source to generate electrical power. Three systems were considered including the MHD single system, the MHD/GT system and the MHD/ST system, and the highest plant efficiency of each system was 61.06%, 58.34% and 60.76% respectively. This result showed that the MHD single system could be expected as the most effective system because of the highest plant efficiency and the simplest system. However, it also showed that the plant efficiency decreased with the increase of the reactor outlet temperature because of the reactor's blanket limit temperature. For this reason, it was under-stood that too high a reactor outlet temperature was not desirable. The temperature of 1999K and enthalpy extraction of 33.5% would be most preferable parameters to MHD single system.
  • Study on Chlorine Removal from Mixture of Waste Plastics

    pp. 242-247

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    DOI:10.3775/jie.84.242

    The recycling of waste plastics that include chlorine-containing plastics, such as polyvinyl chloride, is difficult because that cause the equipment corrosion. Then, the dechlorination method of waste plastics containing chlorine (CCWP) that consists of the melt process and the hot water process of CCWP mixed with coal tar (HOB) and converter dust (CD) as the antichlor agents was examined. The following results were obtained;
    (1) Iron oxide of the principal element of CD combines with chlorine eliminated from CCWP, so that it forms the water-soluble iron chloride on the melt process.
    (2) HOB both promotes the pyrolysis reaction of CCWP and catches chlorine eliminated from CCWP on the melt process.
    (3) About 80% of chlorine included in CCWP forms iron chloride, but about 40% of that cannot be removed because HOB catches them on the melt process.
    (4) Iron chloride caught by HOB can be extracted on the hot water process.
  • Redox Combustion of Methanol, Methane and Carbon Monoxide in Molten (Li+, Na+, K+) 2 (CO32-, SO42-) Mixtures at 550-650°C

    pp. 248-254

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    DOI:10.3775/jie.84.248

    The authors proposed the “Molten Salt Redox Combustion Energy System”, which will be realized recovering the pure carbon dioxide with combustion of fuels in molten salt. We predict that the combustion at this system can be realized the two reactions in molten (Li+, Na+, K+) 2 (CO32-, SO42-). One is the reduction of the alkali sulfate to sulfide with fuels. And the other is the oxidation of the sulfide to sulfate with air. We attempted that the reduction of the sulfate with methanol as fuels and the oxidation of the sulfide with air in the molten (Li+, Na+, K+) 2 (CO32-, SO42-), at the temperature range 550 to 650°C. When the methanol was reacted in the molten salts under inert atmosphere, CO2, CO, H2O and H2 were formed. At 650°C, combustion product CO2 yield in carbon component was 0.81. The activation energy of methanol reaction in the molten salts was 107 kJ·mol-1. When the oxidation of the sulfide with air was conducted after the methanol reaction, the sulfate regeneration with exothermic reaction was confirmed.

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