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. 71 (1992), No. 8

  • The Effect of Ultrasonic Irradiation on the Hydrogenation of Several Coal Model Compounds using Molten Potassium and Ethanol

    pp. 751-757

    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.71.751

    The hydrogenation of coal model compounds using molten potassium and ethanol was carried out with and without ultrasonic irradiation. Aromatic ethers and ploynuclear hydrocarbons were employed as coal model compounds. The cleavage of carbon-oxygen bonds was dominant for the aromatic ethers, whereas main products obtained from the polynuclear hydrocarbons were compounds derived from hydrogenation of the aromatic nucleus. The reaction mechanism was affected by the structure of the substrate: one-electron and/ or two-electron reaction. The effect of ultrasonic irradiation is very small in the reaction of the hydrocarbons. On the other hand, striking effect caused by the ultrasonic irradiation, such as an inccrease of the rate, an increase of the final conversion, and the promotion of sidereactions, ware observed for the reaction of the ethers.
    x

    Readers Who Read This Article Also Read

    1. Hydrogenation of Coal Model Compounds Using Chromium Oxide Catalysts Journal of the Japan Institute of Energy Vol.72(1993), No.6
  • Experimental Simulation of Coke Deposition in Preheater of Coal Liquefaction Process

    pp. 758-765

    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.71.758

    Characteristics of coke deposition onto the inner surface of a coal liquefaction preheater tube were experimentally simulated in an autoclave reactor for a range of industrial operating variables. A test piece with a tubular baffle was installed in the autoclave to generate artificial heat spots in slurry by controlling the heatflux from the piece to the slurry as well as the slurry velocity near the piece.
    No coke deposition was found to occur under conditions with a bulk slurry temperature of ca. 700K, oil/coal weight ratios from 55/45 to 60/40 and slurry velocities from 0.5 to 1.0m/s. On the other hand, an appreciable coke deposition was observed at bulk slurry temperatures over approximately 720K and slurry velocities below about 0.1m/s. Surface temperature of the test piece increased with a progress of the coke deposition. Within the present experimental conditions, the deposition rate was in a range about 1.5×10-6 to 2.3×10-6g·cm-2·min-1·g-1-coal. Also, amount of coke deposited increased with S/C and O/C atomic ratios of parent coal while decreasing with the increase of H/C atomic ratio of parent coal.
  • Effect of Fuel Ratio on Fuel-N Emission During Coal Pyrolysis

    pp. 766-771

    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.71.766

    The emission behaviors of fuel-N from coal were studied by pyrolyzing 6 different coals of which the fuel ratio ranged from 0.9 to 6.6, under various heating conditions in He atmosphere. The experiments were made by changing the temperature (573K-1273K), the coal particle diameter (37-4500 μm) and the heating rate (5-1000K/min). As the results: 1) Fuel/N started to be released from coal when the temperature reached about 673-773K, which was about 50-100°C higher than the temperature where the main volatile components like C and H started to be released. 2) Two different emission behaviour of fuel-N from coal were observed below and above 1173K. 3) The conversion of fuel-N increased with decrease in fuel ratio at the same heating temperature. The conversion of fuel-N, the fuel ratio and the temperature were well correlated. 4) There was no influence of coal particle size on the conversion of fuel-N below 1173K. However, when the temperature became higher than 1173K, the conversion of fuel-N tended to decrease with increase in coal particla diameter.

Article Access Ranking

28 Sep. (Last 30 Days)

  1. Recent Progress of Instrumentation Technology for Process Automation in Steel Industry Tetsu-to-Hagané Vol.106(2020), 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. Accuracy Improvement of the XRD-Rietveld Method for the Quantification of Crystalline Phases in Iron Sintered Ores through the Correction of Micro-absorption Effects ISIJ International Advance Publication
  4. Melting Erosion Failure Mechanism of Tuyere in Blast Furnace ISIJ International Advance Publication
  5. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Advance Publication
  6. Evaluation and Prediction of Blast Furnace Status Based on Big Data Platform of Ironmaking and Data Mining ISIJ International Advance Publication
  7. Potential Influences of Impurities on Properties of Recycled Carbon Steel ISIJ International Advance Publication
  8. Influence of Soil Particle Size, Covering Thickness, and pH on Soil Corrosion of Carbon Steel ISIJ International Advance Publication
  9. Mechanism of Corrosion Protection at Cut Edge of Zn-11%Al-3%Mg-0.2%Si Coated Steel Sheets ISIJ International Vol.60(2020), No.9
  10. Optimization Analysis of Mechanical Performance of Copper Stave with Special-shaped Tubes in the Blast Furnace Bosh ISIJ International Advance Publication

Search Phrase Ranking

28 Sep. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. ultrasonic testing bar small diameter
  5. jeong-sik kim
  6. ultrasonic inclusion
  7. isij international
  8. 柳修介
  9. continuous casting of copper alloys
  10. tetsu