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. 75 (1996), No. 2

  • Elucidation of Coal Liquefaction Mechanism by the Use of Tritium and 35S Tracer Methods

    pp. 87-92

    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.75.87

    Effects of addition of the catalyst (pyrrhotite) and sulfur on hydrogen transfer in liquefaction of Taiheiyo coal were investigated using tritium and 35S. The coal liquefaction was performed at the initial pressure of 5.9 MPa and at 400°C for 30 min with tetralin solvent and tritium-labelled hydrogen, with or without the synthesized pyrrhotite catalyst and sulfur (or 35S-labelled sulfur). The specific activities of tritium and 35S in the reaction products were measured with a liquid scintillation counter. Amounts of exchanged and transferred hydrogens between the gas phase and coal/solvent, were calculated from the distributions of tritium and changes in the composition of products.
    In the reaction with tritiated hydrogen and solvent, the dehydrogenation of tetralin to produce naphthalene and the hydrogen exchange reaction between gas phase and solvent were promoted by added catalyst and sulfur. Added sulfur produced hydrogen sulfide mainly with hydrogen of solvent. A part of added sulfur participated in the sulfur exchange reaction with the pyrrhotite catalyst. In the reaction with tritiated hydrogen, solvent and coal, the hvdrogen addition and exchange to coal and liquefaction products increased with the addition of catalyst and sulfur. It was suggested the sulfur promoted the formation of tetralyl radical in the hydrogen transfer from solvent to coal.
  • Evaluation of Recycle Solvent Qualities for Coal Liquefaction by GC/MS-chromatograms

    pp. 93-98

    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.75.93

    Single ion chromatograms obtained by GC/MS were used for the evaluation of qualities of recycle solvents obtained from a lton/day coal liquefaction plant.
    The compositional changes of n-paraffins, major aromatic compounds and C0-C4-phenanthrenes during the 50 days' operation were clarified. The content of n-paraffins (C14-C30) in a recycle solvent increased gradually from 6.6% to 15.9%. The aromatic compounds which increased relatively after 50 days were two and three cyclic compounds such as naphthalenes and acenaphthenes, and compounds containing five-menbered and dihydrophenalene-type naphthenic rings and pyrene ring. Phenan-threne and methylphenanthrenes decreased significantly, but the contents of C2-C4-phenanthrenes had minor changes.
    C2-C4-Naphthalenes, phenanthrene and their hydrogenated homologues could be determined easily by using GC/MS chromatograms for the recycle solvents, and both the ratios of tetralins/ (naphthalenes+tetralins decalins) and (2H+4H+8H) / (0H+2H+4H+811+14H)-phenanthrenes were shown to be a good parameter for hydrogen donor ability of a liquefaction recycle solvent when the composition of the recycle solvent did not change remarkablly.
  • Reaction Analysis for Hydrotreatment of Coal-derived liquid by GC/MS-chromatograms

    pp. 99-102

    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.75.99

    Coal liquefaction solvents before and after hydrotreatment were analyzed by a capillary GC/MS, and the conversions of some polar compounds were determined by comparing the corresponding single ion chromatograms. The conversion of the polar fraction was estimated by the conversion of the individual polar compound obtained above. The separation of the polar fraction followed by GC/MS-chromatograms analyses enabled the determination of the conversions of many polar components during the hydrotreatment of the coal liquefaction solvent.

Article Access Ranking

30 Sep. (Last 30 Days)

  1. Deformation of Non-metallic Inclusions in Steel during Rolling Process: A Review ISIJ International Advance Publication
  2. Interaction Coefficients of Cu and Sn with Mn in Molten Iron at 1873 K ISIJ International Advance Publication
  3. Thickness classifier on steel in heavy melting scrap by deep-learning-based image analysis ISIJ International Advance Publication
  4. Bandwidth Maximization of Disturbance Observer Based on Experimental Frequency Response Data SICE Journal of Control, Measurement, and System Integration Vol.13(2020), No.6
  5. Soft sensors and Diagnostic Models Using Real Time Data of Blast Furnaces at Tata Steel ISIJ International Advance Publication
  6. Effect of SiO2 content and mass ratio of CaO to Al2O3 on the viscosity and structure of CaO-Al2O3-B2O3-SiO2 slags ISIJ International Advance Publication
  7. Thermodynamic Conditions of MgO and MgO·Al2O3 Formation and Variation of Inclusions Formed in Fe-17 mass%Cr Steel at 1873 K Tetsu-to-Hagané Vol.108(2022), No.8
  8. Non-Cooperative Optimization Algorithm of Charging Scheduling for Electric Vehicle SICE Journal of Control, Measurement, and System Integration Vol.13(2020), No.6
  9. Comparison of Oxidation Behavior of Various Reactive Elements in Alloys during Electroslag Remelting (ESR) Process: An Overview ISIJ International Vol.62(2022), No.8
  10. Effect of 2CaO·SiO2 Addition on Reaction Behavior of Iron Ore Sinters ISIJ International Vol.62(2022), No.9

Search Phrase Ranking

30 Sep. (Last 30 Days)

  1. blast furnace
  2. 鉄と鋼
  3. si-killed spring steel
  4. hydrogen trapping
  5. isij international
  6. steel
  7. bake hardening
  8. damping alloy
  9. matsumura
  10. pickling