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. 81 (2002), No. 10

  • A Study on the Economic Evaluation Method of Coal Resources (II)

    pp. 915-929

    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.81.915

    In the previous report, the authors analysed economically mineable coal resource by way of scrutinizing production and railway transportation cost with respect to horizontal and vertical annual progress, and annual removal of coal mining front line in NSW State, Australia, and concluded that the front line removal of coal mining could be extinct only in 13 years or one twenty fifth of duration in terms of demonstrated coal resources released by the State Government.
    The authors therefore studied subsequently the pragmatic economic evaluation method envisaging that numerous numbers of studies covering World's potential coal fields are essential to detect actually available coal tonnages produced and supplied to the coal consuming countries particularly to Japan.
    Basic analysis has been carried out in this report to compare established but complicated methodology (IRR) with newly developing conventional but ambiguous in its theoretical back ground (SC).
    As the results of theoretical comparison of these methods, it was found that the SC method is suitable to study the economic potential of the World's major coal fields because
    i) In principle, theoretical back ground of SC is the same as established IRR method.
    ii) Data can be utilized, for the SC calculation is comparably easy to collect from the coal fields.
  • Chemical Composition of Coal-derived Liquid and Its Upgraded Oils

    pp. 930-940

    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.81.930

    Coal -derived liquid obtained from 150ton/day NEDOL pilot plant was upgraded over a presulfided Ni-W/Al2O3 catalyst under a hydrogen pressure of 12MPa. The original coal liquid and three upgraded oils were separated into several compound groups and analyzed by GC -FID/NPD, GCMS and FIMS in order to identify the molecular species in the feedstock and upgraded oils.
    The coal liquid was composed of paraffins (17%), naphthenes (20%), oleffins (4%), monoaromatics (17%), polyaromatics (17%) and polar components (25%). After the upgrading over Ni-W/Al2O3, polyaromatics decreased to 0.7-4.7% and polar components were reduced below 0.1%, which resulted in the large increase of naphthenes and naphthenobenzenes. Basic nitrogen compounds (N: 4, 200ppm) in the coal liquid were piridines, anilines, quinolines and benzoquinolines and their hydrogenated derivatives, and nonbasic nitrogen compounds (N: 1, 400ppm) were alkylnitriles, pyrroles, indoles and carbazoles. Sterically hindered nitrogen compounds like 2, 4, 6-trimethylpyridines and 2, 6-anilines tended to remain in upgraded oils. Saturated cyclic nitrogen compounds of which molecular weights were expressed as 165+14n and 205+14n (n=0, 1, 2 …) were found to be least reactive for the denitrogenation, although their detail structure was not identified. Polyaromatic compounds which remained in upgraded oils were biphenyls and dibenzofurans due to their less reactivity and dihydrophenalene and pyrene at their hydrogenation equiribrium.

Article Access Ranking

07 May. (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. Steam Reforming of Methane on Sponge Iron: Influence of Gas Composition on Reaction Rate ISIJ International Vol.61(2020), No.1
  3. Preface to the Special Issue on “Toward Suppression of Hydrogen Absorption and Hydrogen Embrittlement for Steels” ISIJ International Vol.61(2021), No.4
  4. Automatic Ultrasonic Testing of Non-metallic Inclusions Detectable with Size of Several Tens of Micrometers Using a Double Probe Technique along the Longitudinal Axis of a Small-diameter Bar ISIJ International Vol.61(2020), No.1
  5. Rapid Method to Measure Hydrogen Diffusion Coefficient in Metal Using a Multi-sine Wave Signal ISIJ International Vol.61(2021), No.4
  6. Three-dimensional Investigations of Non-metallic Inclusions in Stainless Steels before and after Machining ISIJ International Advance Publication
  7. Review of Positron Lifetime Studies of Lattice Defects Formed during Tensile Deformation in a Hydrogen Environment ISIJ International Vol.61(2021), No.4
  8. Method for Evaluating Hydrogen Embrittlement of High-Strength Steel Sheets Considering Press Formation and Hydrogen Existence State in Steel ISIJ International Vol.61(2021), No.4
  9. A Visualization Method of Quantifying Carbon Combustion Energy in the Sintering Packed Bed ISIJ International Advance Publication
  10. Effects of Stress and Plastic Strain on Hydrogen Embrittlement Fracture of a U-bent Martensitic Steel Sheet ISIJ International Vol.61(2021), No.4

Search Phrase Ranking

07 May. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. coke oven gas injection
  4. ultrasonic inclusion
  5. blast furnace productivity
  6. continuous casting of electrical steel
  7. slag
  8. activities in the liquid solution sio2-cao- mgo-al2o3 at 1600℃
  9. activity coefficient of ti in liquid iron
  10. cokes gasification