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. 97 (2018), No. 4

  • Analyses of Exergy and Environmental Impact on Bio-H2 Production System Using 2-step PSA

    pp. 77-87

    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.97.77

    In recent years, technological development of fuel cells has progressed, and hydrogen demand for the fuel is expanding. However, since fossil fuel is mainly used as the energy source for hydrogen, from the viewpoint of life cycle assessment (LCA), even if hydrogen is used as energy, it contributes to the emission of greenhouse gases. Therefore, we have been developing biomass-derived hydrogen (Bio-H2) production process. It was deemed that the hydrogen purification process (PSA; pressure swing adsorption) had the most environmental impact. as a solution to that, we developed a 2-step PSA. However, the effective use of energy and the environmental impact in the Bio-H2 production process that introduced 2-step PSA have not been conducted. Therefore, in order to verify the effective use of energy and the environmental impact of the process, we designed Bio-H2 production process using 2-step PSA based on gasification and purification experimental data, and evaluate the effectiveness of energy use of the process using the exergy analysis. In addition, we assessed the environmental impact of the process using LCA analysis. As a result, it was shown that the exergy efficiency of the 2-step PSA case could be improved by 1.7 points over that of the conventional PSA case. Furthermore, compared to the conventional PSA case, LCA analysis resolved that consumption of fossil fuel would be reduced in the case of 2-step PSA case, and the effect of global warming be greatly reduced. By using the evaluation method integrating the exergy analysis and the environmental impact assessment, which was newly proposed in this paper, we believe that it should contribute to promoting technology development of energy conversion process derived from renewable energy.
  • Behavior of Sulfur in Liquid Phase Oxidation of Coal

    pp. 88-96

    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.97.88

    In order to develop an efficient pre-desulfurization technology for both inorganic and organic sulfurs in coals under the mild condition, oxidative desulfurization using hydrogen peroxide was carried out for five kinds of coals with different rank. The coal samples were agitated in the hydrogen peroxide aqueous solution for 2 h at the room temperature. Pyritic sulfur and sulfate as the inorganic sulfur were removed completely from the solid phase by the treatment. Organic sulfur was simultaneously removed, for example, 84% of organic sulfur was reduced for a low rank coal. The removed sulfur from the solid phase dissolved in the hydrogen peroxide aqueous solution as sulfate. XANES analysis showed that thiophenic sulfurs in the coals changed to sulfoxide and sulfone during the hydrogen peroxide treatment. The removal extent of thiophenic sulfur decreased with the increase of the coal rank and correlated well with the aromaticity of the raw coals.
    x

    Readers Who Read This Article Also Read

    1. Table of Contents (in Japanese) Journal of the Japan Institute of Energy Vol.97(2018), No.4
  • Table of Contents (in English)

    p. 9704tce_1

    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.97.9704tce_1

  • Table of Contents (in Japanese)

    p. 9704tcj_1

    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.97.9704tcj_1

    x

    Readers Who Read This Article Also Read

    1. Behavior of Sulfur in Liquid Phase Oxidation of Coal Journal of the Japan Institute of Energy Vol.97(2018), No.4

Article Access Ranking

26 May. (Last 30 Days)

  1. Iron Powders from Steel Industry by-products: A Review ISIJ International Advance Publication
  2. In Situ Temperature Measurement of Sinter Beds at High Spatial and Time Resolution ISIJ International Vol.58(2018), No.5
  3. Measurement for Contact Angle of Iron Ore Particles and Water ISIJ International Vol.58(2018), No.3
  4. Quantitative Analysis of Mineral Phases in Iron-ore Sinter by the Rietveld Method of X-ray Diffraction Patterns ISIJ International Advance Publication
  5. Effect of Natural Gas Injection Point on Combustion and Gasification Efficiency of Pulverized Coal under Blast Furnace Condition Tetsu-to-Hagané Vol.104(2018), No.5
  6. Recovery of Phosphorus from Modified Steelmaking Slag with High P2O5 Content via Leaching and Precipitation ISIJ International Vol.58(2018), No.5
  7. Dissolution Mechanism of Carbon Brick into Molten Iron ISIJ International Vol.58(2018), No.5
  8. Amenability of Reduced Iron Ore Pellets to Mechanical Degradation ISIJ International Advance Publication
  9. Agglomeration of Return Fines of Sinter for Blast Furnace Raw Materials Tetsu-to-Hagané Vol.104(2018), No.5
  10. Effect of Annealing Temperature on the Selective Oxidation and Reactive Wetting of a 0.1C-6Mn-2Si Advanced High Strength Steel During Continuous Galvanizing Heat Treatments ISIJ International Advance Publication

Search Phrase Ranking

26 May. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. reduction behavior of iron oxides in hydrogen and carbon monoxide atmospheres
  5. 鉄と鋼
  6. gehlenite
  7. steel
  8. gehlenite mold flux
  9. isij
  10. isij international