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. 82 (2003), No. 1

  • Sulfur Form in Coal and SO2 Emission Behavior at AFBC Plant

    Ichiro SAITO, Munehide KAWAMURA, Hideki GOTO

    pp. 48-56

    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.82.48

    Abstract

    This paper reports the results of an investigation on SO2 formation from sulfur in fuel (Fuel-S) and SO2 capture by limestone in a bench-scale bubbling fluidized bed combustor. Conversion of fuel-S to S in ash (ash-S), S in char (Char-S) and S in volatile matter (Volatile-S) during pyrolysis and combustion was experimentally evaluated under fluidized bed combustion condition. The formation of SO2 from fuel-S in a fluidized bed consisted of sand, which was inert for SO2 capture, indicated that SO2 was formed from char-S and volatile-S and the contribution of ash-S played only minor role in SO2 formation.
    Under limestone feed conditions, the emission of SO2 was strongly dependent on conversion of fuel-S to char-S during pyrolysis, whereas conversion to volatile-S had little influence on SO2 emission. This implies that the sulfur in the volatile matter is oxidized at the bottom of the bed and most part of SO2 from volatile-S is captured in the dense bed. In contrast, char-S is considered to be oxidized to SO2 throughout the bed, thus the SO2 from char formed in the vicinity of the bed surface is considered to escape from the bed without being captured by limestone since the contact time is short. These results suggest that the conversion of combustible sulfur (char-S+volatile-S) to char-S is very important to predict the SO2 emission from bubbling fluidized bed combustors under limestone feed conditions.

  • Reduction of Electricity Consumption and CO2 Emissions by Introduction of Information Technology (IT)

    Yasunari MATSUNO, Yutaka GENCHI, Hiroshi YAGITA, Atsushi INABA, Kazuki SATAKE, Hiroyuki MORI, Hidemi TOMITA

    pp. 57-63

    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.82.57

    Abstract

    Electricity consumption in the Internet, electronic network, in Japan was calculated with statistics for 1998. Methodologies to allocate the electricity consumption to each service provided by Internet were proposed. Then, electricity consumption and CO2 emissions associated with downloading 1 CD of music by Internet, especially, using dialup, were investigated. In addition, CO2 emissions associated with distributing 1 CD of music by ordinal compact disc were investigated and compared with those by Internet. CO2 emissions for downloading 1 CD of music by Internet were dependent on transmission speed, 0.79kg-CO2 if the communication speed is 64kbps (actual throughput: 51 kbps), and 0.16kg-CO2 if the communication speed is 1.5Mbps (actual throughput: 1.2Mbps). On the other hand, it was calculated that CO2 emissions for distributing 1 CD of music by ordinal compact disc was 0.33kg-CO2. CO2 emissions for downloading 1 CD of music by Internet will be reduced further with the increase in transmission speed.
  • © 2003 The Japan Institute of Energy

Article Access Ranking

16 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. Structural and Mechanical Characterizations of Top Dross in a Molten Zinc Bath ISIJ International Vol.61(2021), No.3
  6. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  7. Deformation Behavior of Longitudinal Surface Flaws in Flat Rolling of Steel Wire 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

16 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. tetsu-to-hagané
  4. blast furnace productivity
  5. slag
  6. blast furnace permeability
  7. continuous casting of electrical steel
  8. deoxygen in liquid iron
  9. electrical steel and continuous casting
  10. equilibrium of deoxygen in liquid iron