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. 85 (2006), No. 6

  • Economics and a Policy Option on Wood Pellet Fuel in Japan

    pp. 451-460

    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.85.451

    Wood pellet has the potential to reduce dependency on fossil fuels, mitigate global warming and stimulate the forest industries. Economics of wood pellet and impact of carbon tax are examined in this study. The target of the study is space heating energy in the residential, commercial and public sectors in Japan. An energy-economic model in which space heating energy is supplied by wood pellet and kerosene is developed. The model contains market share functions that determine how many customers would choose wood pellet depending on the price competition between wood pellet and kerosene.
    Model analysis shows the conclusions as follows. Without carbon tax, the pellet price should be less than 35JPY/kg for the market penetration. With 30, 000JPY/tC carbon tax, it becomes 45JPY/kg. Imposing carbon tax leads to an increase in the penetration of pellet except for the case where the pellet price stays at as high level as the current situation. It is also shown that the low cost wood collecting system can drastically increase the utilization of forest biomass such as logging residues and thinned wood in favorable situations. The policy scenario for dissemination of pellet is proposed based on the result of the analysis.
  • Char Swelling and Shrinking Behavior at Early Stage of Coal Gasification

    pp. 461-470

    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.85.461

    The char morphology after devolatilization and its evolution during gasification plays an important role in determining the coal quality impact on the performance of gasifier. The particle size distribution of devolatilized char affects particle trajectories in gasifier and char entrainment to heat exchanger. The purpose of this study is to propose prediction method of char swelling and shrinking ratio in the early stage of gasification. Swelling and shrinking behavior of single particle was observed using pressurelized laser heater. In order to quantitatively measure the change of particle size, char samples were also produced by drop tube reactor for several types of coal by changing reaction temperature and initial particle size. Moreover, XRD and NMR analyses were carried out to investigate the change of carbon structure during devolatilization.
    Swelling and shrinking ratio after devolatilization could be described by coal properties, such as volatile matter, ash, carbon, hydrogen, oxygen and maceral content. In particular, vitrinite had large effect on the swelling behavior. The result of XRD and NMR analyses indicated that the development of carbon lamination layer was recognized in plastic range and the hexagonal network extended at solidification stage during devolatiolization.
  • Effect of Flow Behavior on Degradation of De-NOx Catalyst

    pp. 471-474

    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.85.471

    The effect of flow behavior on degradation of de-NOx catalyst is experimentally and numerically investigated. The de-NOx rate for used catalysts is evaluated using laboratory-scale test apparatus. and the flow behavior in a honeycomb rectangular tube of the catalyst is studied by direct numerical simulations (DNS). The results show that the degradation of the catalyst is enhanced in the upstream region near the inlet. This is due to that the injected flow is a turbulent flow, which facilitates particles in flue gas to attach the catalyst wall, and the flow becomes laminar downstream in the catalyst.

Article Access Ranking

19 Apr. (Last 30 Days)

  1. Three-dimensional Investigations of Non-metallic Inclusions in Stainless Steels before and after Machining ISIJ International Advance Publication
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Influence of Ore Assimilation and Pore Formation during Sintering on Reduction Behavior of Sintered Ores Tetsu-to-Hagané Vol.107(2021), No.3
  4. Steam Reforming of Methane on Sponge Iron: Influence of Gas Composition on Reaction Rate ISIJ International Vol.61(2020), No.1
  5. Preface to the Special Issue on “Toward Suppression of Hydrogen Absorption and Hydrogen Embrittlement for Steels” ISIJ International Vol.61(2021), No.4
  6. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  7. Effect of Rare Earth Ce on the Morphology and Distribution of Al2O3 Inclusions in High Strength IF Steel Containing Phosphorus during Continuous Casting and Rolling Process ISIJ International Vol.61(2021), No.3
  8. Improvement in Reduction Behavior of Sintered Ores in a Blast Furnace through Injection of Reformed Coke Oven Gas Tetsu-to-Hagané Vol.107(2021), No.4
  9. Rapid Method to Measure Hydrogen Diffusion Coefficient in Metal Using a Multi-sine Wave Signal ISIJ International Vol.61(2021), No.4
  10. 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

Search Phrase Ranking

19 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. blast furnace permeability
  4. blast furnace productivity
  5. slag
  6. ultrasonic inclusion
  7. activity coefficient of ti in liquid iron
  8. continuous casting of electrical steel
  9. deoxygen in liquid iron
  10. electrical steel and continuous casting