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. 84 (2005), No. 5

  • The Structural Analysis of Rapid Preheated Coal Using ESR Spectroscopy

    pp. 426-430

    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.84.426

    Coal was heat-treated up to the softening temperature under the 2 types of heating conditions (10°C/min, 104°C/min). Spin concentration by high temperature Iusitu ESR, and the saturation behavior of the ESR spectrum were measured. Based on that result, effect of rapid preheating on coal molecular structure was examined.
    (1) Because the change in coal chemical structure by the cracking reaction is taking place, spin concen-tration of slow preheated coal is higher than that of rapidly preheated coal and raw coal. At 300°C or more, the spin concentration of rapidly preheated coal is same profile as raw coal. In the case of rapid preheating, it is indicated that the degree of coal structure change by cracking reaction is small.
    (2) The following results were obtained as the saturation power of ESR was measured. At 250°C or more, the saturation power of slow preheated coal declines as the temperature rises. One side, it confirmed that the saturation power of rapidly preheated coal became large at 370°C. The increase in saturation power indicates that the relaxation of coal structure progressed about coal molecular structure part that can be observed with ESR.
    x

    Readers Who Read This Article Also Read

    1. Biomass Ethanol Production from Sugarcane for Energy Generation to Support Sugar Production Journal of the Japan Institute of Energy Vol.84(2005), No.11
    2. The Effect of Hydrophilicity/hydrophobicity Ratio of Coal Surface on the Column Flotation Process Journal of the Japan Institute of Energy Vol.84(2005), No.11
    3. RDF Carbonization System and the Utilization of the Carbonized Product Journal of the Japan Institute of Energy Vol.84(2005), No.11
  • Trace Elements Behavior in Coal Gasification Based on Thermodynamics Equilibrium Calculation

    pp. 431-437

    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.84.431

    To understand behavior of trace elements in high temperature coal gasification accompanied with molten ash, the chemical compounds were estimated by thermodynamic equilibrium calculation. The calculation results were compared with the test results of a high temperature and pressurized coal gasification pilot plant with partial combustion. As for distribution of trace elements in slag discharged from pre-combustor, in the char separated by char collector and the product gas containing the fly ash, the estimated results for almost of non-volatile and some of volatile elements were corresponding to the test results well and those for semi-volatile elements as Mn, Cr, Pb, As and volatile elements as Hg and F were not well. The equilibrium calculation results of chemical compounds related to the semi-volatile elements suggested that the slagliquid phase exists together with solid phase in the char and the fly ash while the compounds in the molten slag discharged from the high-temperature gasifier over 1600°C were all slag-liquid phases. Furthermore, study on influence of operating condition on the chemical compounds suggested that increasing temperature of pre-combustor decreased the semi-volatile elements such as Pb in slag and increased it in char. Pressure increased it in slag and decreased it in other discharged. Gas cooling temperature strongly influenced the behavior, increased the semi-volatile elements in product gas and decreased it in slag and char.
    x

    Readers Who Read This Article Also Read

    1. Biomass Ethanol Production from Sugarcane for Energy Generation to Support Sugar Production Journal of the Japan Institute of Energy Vol.84(2005), No.11
    2. The Effect of Hydrophilicity/hydrophobicity Ratio of Coal Surface on the Column Flotation Process Journal of the Japan Institute of Energy Vol.84(2005), No.11
    3. RDF Carbonization System and the Utilization of the Carbonized Product Journal of the Japan Institute of Energy Vol.84(2005), No.11

Article Access Ranking

23 Sep. (Last 30 Days)

  1. Formation and Evolution of Inclusions in High Chromium Steel ISIJ International Vol.61(2021), No.9
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Preface to the Special Issue on “Recent Progress in Inclusion/ Precipitate Engineering” ISIJ International Vol.61(2021), No.9
  4. Evaluation of Interfacial Energy between Molten Fe and Fe-18%Cr-9%Ni Alloy and Non-Metallic Inclusion-Type Oxides ISIJ International Vol.61(2021), No.9
  5. Effect of Heating Rate on Carbothermic Reduction and Melting Behavior of Iron Ore-Coal Composite Pellets ISIJ International Advance Publication
  6. Analysis of Air-Mist Cooling Effect for Coil in the Electromagnetic Induction Controlled Automated Steel Teeming System ISIJ International Vol.61(2021), No.9
  7. Production and Technology of Iron and Steel in Japan during 2020 ISIJ International Vol.61(2021), No.6
  8. Modeling of Wall Shear Stress Induced Inclusion Transport and Removal in Multi-Strand Tundish ISIJ International Vol.61(2021), No.9
  9. Three-dimensional Quantitative Evaluation of the Lamellar Curvature in Pearlitic Steel Based on an Orientation Analysis of Cementite ISIJ International Advance Publication
  10. Simultaneous Analysis of Soluble and Insoluble Oxygen Contents in Steel Specimens Using Inert Gas Fusion Infrared Absorptiometry ISIJ International Vol.61(2021), No.9

Search Phrase Ranking

23 Sep. (Last 30 Days)

  1. blast furnace
  2. inconel 600
  3. blast furnace productivity
  4. miyamoto goro
  5. b2o3 mold flux
  6. blue carbon
  7. investigation of arc behavior and temperature distribution corresponding to electrode and phase configurations in a multiphase ac arc
  8. ohno
  9. sei kimura
  10. skd61