Steel Science Portal

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. 89 (2010), No. 6

  • Life Cycle CO2 Emission Analysis of Hydrogen Storage and Battery for Wind Power Generation

    Tatsuro USUI, Hiroki HONDO

    pp. 551-561

    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.89.551

    Abstract

    Since electricity generated by wind power and other renewable sources fluctuates significantly, their extensive use requires energy storage technologies. This study analyzes life cycle CO2 emission (LCCO2) of power generation systems combining wind turbines with energy storage equipment, focusing on four types of hydrogen storage, i.e. compression hydrogen (cH), liquid hydrogen (LH), metal hydride (MH), and organic hydride (MCH) as well as three types of battery, i.e. lead-acid (PbA), redox flow (RF), and sodium-sulfur (NaS). In order to appropriately compare the two different types of system, the functional unit is defined to meet customers' demands of electricity and heat, because this study assumes that hydrogen is finally converted into electricity and heat using a fuel cell at consumption sites. The analysis revealed that, in general, LCCO2 of battery systems is smaller than that of hydrogen storage systems, not depending on characteristics of customers (e. g. heat-to-power ratios, load curves) and the patterns of wind power, when wind turbines are away from consumption sites. However, when wind turbines are located at consumption sites, LCCO2 of cH and MH systems is almost equivalent to that of battery systems for a customer who has a relatively large heat demand such as a factory, hotel and hospital.

  • New Approaches to Biodiesel Production by Ethanolysis with Calcium Hydroxide Catalyst Using Thermal Pretreatment with Glycerol

    Hendrex KAZEMBE-PHIRI, Yukihiko MATSUMURA, Tomoaki MINOWA

    pp. 562-566

    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.89.562

    Abstract

    This was a study to pursue new sustainable sources of power in Malawi and other developing countries of Sub-Saharan Africa by investigating a novel approach for biodiesel production via ethanolysis of pretreated oil feedstock with calcium hydroxide using thermal pretreatment with glycerol. 0.5 g of Groundnut (Arachis hypogaea) oil feedstock premixed with glycerol and Ca(OH)2 was thermally pretreated at 100 °C and stirred at 1000 rpm for 1-3 h. The triglycerides (TG) decomposed into diglycerides (DG) and monoglycerides (MG), which are reactive intermediates of the ethanolysis. This effect of pretreatment was investigated in comparison with the effect of other catalyst. Then, the pretreated oil was reacted under the following conditions: 100 °C, 12-to-1 ethanol (EtOH)-to-oil molar ratio, stirring at 1000 rpm, catalyst load of 2 wt%, time from 0.5-2 h. Thermal pretreatment with glycerol achieved a significant fatty acid ethyl ester (FAEE) yield of 76 wt% (comparable to the yields obtained with calcium oxide (h-CaO) and surface-modified calcium oxide (s-CaO)). In tests on the reuse of the Ca(OH)2 catalyst in repeated reactions, the yield did not decrease sharply with repetitive use. Given that all of the materials tested in our experiments are available renewably in Sub-Saharan Africa, we believe that biodiesel production via ethanolysis has the potential to provide a sustainable source of power in that region.

  • Discussion on Role of Energy Related Technology Transfer in the High Economic Growth Rate Period Based on Chinese Energy Demand and Supply Data

    Wenqing ZHANG, Toshinori KOJIMA

    pp. 567-576

    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.89.567

    Abstract

    China has already become the second largest oil consumption country following the United States in the world. Furthermore the Chinese oil demand keeps increasing at the annual growth rate larger than ten %. The oil import dependence of China is forecasted to be 64.5% in 2020. It will be inevitable that China with rapid increase in demand and Japan with about 100% import rate of crude oil become competitors in energy secure field, especially oil. However, the future cooperation is expected in the areas of conservation of energy, new energy development and energy related environmental conservation. Because the energy related technologies such as desulfurization in the coal and oil combustion/conversion, coal liquefaction, energy conservation in the mining and manufacturing, traffic transportation and construction areas, the reduction of carbon dioxide emission, new and atomic energy development and so on are advanced fields of Japan and the related technologies and know-how are accumulated in Japan, not only the simple technology transfer to China, but also business opportunity for a Japanese enterprise will increase through cooperation in the above areas.
  • © 2010 The Japan Institute of Energy

Article Access Ranking

14 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. Numerical Simulation of Flow, Heat, Solidification, Solute Transfer and Electromagnetic Field for Vertical Mold and Curved Mold of Billet ISIJ International Vol.61(2021), No.3
  5. Deformation Behavior of Longitudinal Surface Flaws in Flat Rolling of Steel Wire ISIJ International Advance Publication
  6. Structural and Mechanical Characterizations of Top Dross in a Molten Zinc Bath ISIJ International Vol.61(2021), No.3
  7. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  8. Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification ISIJ International Vol.61(2021), No.3
  9. Prediction of Spatial Composition Distribution of Inclusions in the Continuous Casting Bloom of a Bearing Steel under Unsteady Casting ISIJ International Vol.61(2021), No.3
  10. 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

Search Phrase Ranking

14 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. slag
  4. tetsu-to-hagané
  5. blast furnace productivity
  6. continuous casting of electrical steel
  7. electrical steel and continuous casting
  8. fundamental study on rapid reduction of chromium ore in basic oxygen furnace
  9. iron phosphide (fe2p, fe3p)
  10. iron phosphide (fe2p, fe3p), formation energy