Journal of the Japan Institute of Energy
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up
ONLINE ISSN: 1882-6121
PRINT ISSN: 0916-8753

Journal of the Japan Institute of Energy Vol. 83 (2004), No. 6

  • Study on the Existence Form of Hydroxyl Groups in Coals Reactivity of Chromic Oxide Ion with Hydroxyl Groups in Coals

    pp. 417-422

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.83.417

    The reaction of chromic oxide ion in aqueous solution with twelve kinds of coal samples has been studied. It was found that the chromic oxide ion reacted selectively to catechol type compounds at 273K by the experimental result for some kinds of coal model chemical compounds. The existence ratio of catechol type components in each coals was estimated at 273K.
  • Determining the Error in Total Efficiency Levels under Changing Heat and Power Demands at a Co-generation System

    pp. 423-428

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.83.423

    The total efficiency of a co-generation system is commonly estimated using average heat and power demands. It is known that the estimated total efficiency greatly differs when using hourly average demand as opposed to annual demand data, owing to demand fluctuation.
    The aim is to determine the numerical values of the error when examining the total efficiency of co-generation system; and to explain analytically why the error arises.
    In the paper, based on mathematical model, the error is modeled as the ratio of the estimated total efficiency to the real total efficiency. The error was given by: (1) the heat to power ratios of the site and of the co-generation system itself; (2) the efficiencies of co-generation electric power and of auxiliary boiler; and (3) the demands fluctuation rates of the site.
    Estimated total efficiency is overestimated. The error achieves its maximum value when the heat to power ratio of demand and of the co-generation system match. The error is nearly constant, when a heat to power ratio at the site is higher than the heat to power ratio of the co-generation system itself. Such error varies by 10% when considering a gas turbine co-generation system, if demands fluctuate by 10% from their respective average demands.
  • The Effects of Hydrogen Donation by Gas and Liquid Phases on Coprocessing of Coal and Plastics

    pp. 429-434

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.83.429

    The effects of hydrogen donation on coprocessing of coal and three kinds of plastics such as high density polyethylene (HDPE), polypropylene (PP), and polystylene (PS) were investigated under the presence of hydrogen from gas or liquid phase. In the liquefaction reaction of coal alone or each plastic alone, hydro-gen from liquid phase (tetralin) gave a large influence on yield, as compared with hydrogen from gas phase. Contrary to coal, the gasification of plastics was inhibited by the presence of hydrogen from liquid phase.
    In the coprocessing using decalin solvent under hydrogen gas, the gas yield decreased greatly and the oil yield increased. However, in the coprocessing using tetralin solvent, little interaction was observed. It was suggested that the reactions between coal and plastic radicals were inhibited as a result of rapid stabi-lization of the produced radicals by hydrogen from tetralin.
    The effect of plastic type on coprocessing reaction under decalin solvent was investigated. All the plastics tested decreased the gas yield, which suggested plastic radicals were stabilized in coprocessing reaction. Furthermore, experimental results suggested that HDPE radical tend to be stabilized by the contact with other radicals, and that PP and PS radicals tend to be stabilized by hydrogen transfer from decomposi-tion products of coal.

Article Access Ranking

14 Jul. (Last 30 Days)

  1. Production and Technology of Iron and Steel in Japan during 2019 ISIJ International Vol.60(2020), No.6
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Numerical Simulation of Fluid Flow and Solidification in a Vertical Round Bloom Caster Using a Four-port SEN with Mold and Strand Electromagnetic Stirring ISIJ International Advance Publication
  4. Scheduling in Continuous Steelmaking Casting: A Systematic Review ISIJ International Vol.60(2020), No.6
  5. Numerical Simulation for the Influence of EMS Position on Fluid Flow and Inclusion Removal in a Slab Continuous Casting Mold ISIJ International Vol.60(2020), No.6
  6. From Iron Ore to Crude Steel: Mass Flows Associated with Lump, Pellet, Sinter and Scrap Iron Inputs ISIJ International Vol.60(2020), No.6
  7. Taguchi Orthogonal Test on Granule Properties and Porosity Distribution in Sintering Bed using High-resolution X-ray Computed Tomography ISIJ International Vol.60(2020), No.6
  8. Experimental Evaluation of Texture Change during Grain Growth in Electrical Steel Sheets and Its Prediction by Phase Field Simulation Tetsu-to-Hagané Vol.106(2020), No.7
  9. Tension Leveling Using Finite Element Analysis with Different Constitutive Relations ISIJ International Vol.60(2020), No.6
  10. Deoxidation of Electroslag Remelting (ESR) – A Review ISIJ International Vol.60(2020), No.6

Search Phrase Ranking

14 Jul. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. cao sio2 viscosity
  5. 17-7 ph
  6. hole expansion ratio
  7. big data
  8. cao
  9. cold formed bainitic steel
  10. digitalization