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Journal of the Japan Institute of Energy Vol. 103 (2024), No. 12

ISIJ International
belloff
ONLINE ISSN: 1882-6121
PRINT ISSN: 0916-8753
Publisher: The Japan Institute of Energy

Backnumber

  1. Vol. 103 (2024)

    1. No.12
    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
    8. No.5
    9. No.4
    10. No.3
    11. No.2
    12. No.1

  2. Vol. 102 (2023)

    1. No.12
    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
    8. No.5
    9. No.4
    10. No.3
    11. No.2
    12. No.1

  3. Vol. 101 (2022)

    1. No.12
    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
    8. No.5
    9. No.4
    10. No.3
    11. No.2
    12. No.1

  4. Vol. 100 (2021)

    1. No.12
    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
    8. No.5
    9. No.4
    10. No.3
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    12. No.1

  5. Vol. 99 (2020)

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    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
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    10. No.3
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    12. No.1

  6. Vol. 98 (2019)

    1. No.12
    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
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    10. No.3
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    12. No.1

  7. Vol. 97 (2018)

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    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
    8. No.5
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    12. No.1

  8. Vol. 96 (2017)

    1. No.12
    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
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    8. No.5
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  9. Vol. 95 (2016)

    1. No.12
    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
    8. No.5
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    12. No.1

  10. Vol. 94 (2015)

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    3. No.10
    4. No.9
    5. No.8
    6. No.7
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  11. Vol. 93 (2014)

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    3. No.10
    4. No.9
    5. No.8
    6. No.7
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  12. Vol. 92 (2013)

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    3. No.10
    4. No.9
    5. No.8
    6. No.7
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  13. Vol. 91 (2012)

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  14. Vol. 90 (2011)

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    6. No.7
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  15. Vol. 89 (2010)

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  16. Vol. 88 (2009)

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    6. No.7
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  17. Vol. 87 (2008)

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    4. No.9
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    6. No.7
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  18. Vol. 86 (2007)

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  19. Vol. 85 (2006)

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    6. No.7
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  20. Vol. 84 (2005)

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  21. Vol. 83 (2004)

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  22. Vol. 82 (2003)

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  23. Vol. 81 (2002)

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  24. Vol. 80 (2001)

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    5. No.8
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  25. Vol. 79 (2000)

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    4. No.9
    5. No.8
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  26. Vol. 78 (1999)

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  27. Vol. 77 (1998)

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  28. Vol. 76 (1997)

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  29. Vol. 75 (1996)

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  30. Vol. 74 (1995)

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  31. Vol. 73 (1994)

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  32. Vol. 72 (1993)

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  33. Vol. 71 (1992)

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    4. No.9
    5. No.8
    6. No.6
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Journal of the Japan Institute of Energy Vol. 103 (2024), No. 12

Evaluation of Self-heating Propensities of Coal/Biomass Deposits in the Roller Mill of Pulverized Coal Thermal Power Plants

Kazuki HASHIMOTO, Tetsuya SHOJI, Akimasa YAMAGUCHI, Hiromi SHIRAI

pp. 95-104

DOI:

10.3775/jie.103.95

Abstract

Self-heating propensities of coal/biomass deposits in the roller mill were evaluated by the wire-mesh basket tests with four types of coals and three types of biomasses. The results showed that initial heat release rate obtained by the product of initial rate of temperature rise and heat capacity was considered suitable for evaluating the self-heating propensities of deposited coals and biomasses of 10 cm cubic. The initial heat release rate of biomass at 80℃ tended to be lower than that of coal deposits. The effects of ambient temperature on the self-heating propensities of coal/biomass deposits were evaluated. The obtained data showed that the initial heat release rate of biomass was less affected by ambient temperature than that of coal. Therefore, the risk of self-heating and ignition of biomasses was considered lower than that of coals. Furthermore, the effect of coal/biomass ratio on the self-heating propensities of coal/biomass deposits was evaluated at 80℃. The initial heat release rate of the mixture was decreased with the increase of the ratio of biomass to coal. Additionally, it was suggested that if the bulk density of coal/biomass mixture agrees well with the volume-weighted average bulk density of each mono-sample, the initial heat release rate of the mixture can also be estimated by the volumeweighted average of that of the mono-sample.

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Evaluation of Self-heating Propensities of Coal/Biomass Deposits in the Roller Mill of Pulverized Coal Thermal Power Plants

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Binary Analysis on Interaction between Cellulose, Lignin, and Xylose during Hydrothermal Carbonization

Rittanupap THAVORN, Sanchai KUBOON, Tawatchai CHARINPANITKUL, Yukihiko MATSUMURA

pp. 105-114

DOI:

10.3775/jie.103.105

Abstract

Binary mixtures of cellulose, xylose, and lignin were hydrothermally carbonized using an autoclave reactor at 280 °C for 2 h. Mass yield, carbon content of the product hydrochar, and carbon yield were determined by changing the component ratio in the feedstock to elucidate the interaction between components. No Interaction were observed between feedstock components. However, an interaction was observed in the liquid product. Cellulose and xylose produced common liquid products including acetic acid, levulinic acid, and glycolic acid; however, when mixed with lignin, levulinic acid generation was suppressed while glycolic acid generation was enhanced. The equations were derived based on a model without interactions between the components, and their parameters were determined. The resulting equations reproduced the experimental yield and carbon content with an average relative error of 0.102.

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Binary Analysis on Interaction between Cellulose, Lignin, and Xylose during Hydrothermal Carbonization

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