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

24 Jan. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. In-Situ Observation Experimental Study on the Agglomeration and Dispersion of Particles at the Interface of High-temperature Melts ISIJ International Advance Publication
  3. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Vol.107(2021), No.1
  4. Quantitative Evaluation of Solute Hydrogen Effect on Dislocation Density in a Low-carbon Stable Austenitic Stainless Steel ISIJ International Advance Publication
  5. Development and Prospects of Refining Techniques in Steelmaking Process ISIJ International Vol.60(2020), No.12
  6. In situ Observation of Reduction Behavior of Multicomponent Calcium Ferrites by XRD and XAFS Tetsu-to-Hagané Advance Publication
  7. Effects of Residual Stress on Hydrogen Embrittlement of a Stretch-Formed Tempered Martensitic Steel Sheet ISIJ International Advance Publication
  8. Improved Hydrogen Embrittlement Resistance of Steel by Shot Peening and Subsequent Low-temperature Annealing ISIJ International Advance Publication
  9. Preface to the Diamond Jubilee Issue on “Selected Topics in Iron and Steel and Their Processing toward the New Steel Age” ISIJ International Vol.60(2020), No.12
  10. Intraparticle Temperature of Iron-Oxide Pellet during the Reduction Tetsu-to-Hagané Vol.60(1974), No.9

Search Phrase Ranking

24 Jan. (Last 30 Days)

  1. blast furnace
  2. 西山記念技術講座
  3. blast furnace permeability
  4. j. f. elliott
  5. blast furnace burden distribution
  6. blast furnace productivity
  7. bottom dross
  8. carbon-containing pellet
  9. cog blast furnace injection
  10. cr2o3 al2o3