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

01 Mar. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. Recovery of Phosphorus from Modified Steelmaking Slag with High P2O5 Content via Leaching and Precipitation Tetsu-to-Hagané Vol.107(2021), No.2
  3. Effect of Varied Oxygen Levels on the Oxidation of a Magnetite Pellet Bed during Pot Furnace Induration ISIJ International Advance Publication
  4. Time-resolved and in-situ Observation of Semisolid Deformation in Al–Cu Alloys with Equiaxed and Columnar Grain Structures by Using a Combination Technique of 4D-CT and 3DXRD ISIJ International Advance Publication
  5. Improvement of Bragg-edge Neutron Transmission Imaging for Evaluating the Crystalline Phase Volume Fraction in Steel Composed of Ferrite and Austenite ISIJ International Advance Publication
  6. Deformation-induced Martensite Transformation Behavior during Tensile and Compressive Deformation in Low-alloy TRIP Steel Sheets ISIJ International Vol.61(2021), No.2
  7. Influence of Isothermal Treatment Prior to Initial Quenching of Q&P Process on Microstructure and Mechanical Properties of Medium Mn Steel ISIJ International Vol.61(2021), No.2
  8. Selective Separation of Metallic Fe Remaining in Slags Using Electrical Pulse Disintegration ISIJ International Advance Publication
  9. Effect of Initial Austenite Grain Size on Microstructure Development and Mechanical Properties in a Medium-carbon Steel Treated with One-step Quenching and Partitioning ISIJ International Vol.61(2021), No.2
  10. Spot-Welded Tensile Properties in Automobile Ultrahigh-Strength TRIP-Aided Martensitic Steel Sheet ISIJ International Vol.61(2021), No.2

Search Phrase Ranking

01 Mar. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace coal tar injection
  4. blast furnace productivity
  5. 西山記念技術講座
  6. a practical approach to enhance wear resistance of bearings in molten zinc
  7. development of sanyo ultra refining process
  8. isij international
  9. spa-h
  10. weld distortion