Journal of the Fuel Society of Japan
Online ISSN : 2185-226X
Print ISSN : 0369-3775
ISSN-L : 0369-3775
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Volume 57, Issue 1
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1978 Volume 57 Issue 1 Pages 1-2
    Published: January 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.1
    JOURNAL FREE ACCESS
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  • Polymeric Character, Micell Structure and Compatibility of Coal
    Yuzo Sanada
    1978 Volume 57 Issue 1 Pages 3-12
    Published: January 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.3
    JOURNAL FREE ACCESS
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    Polymeric character and micell structure of coal are reviewed from view point of interaction between solvent and coal. Molecular weight per crossed unit of coal is of important factor determining not only chemical structure but physical properties of coal. The cohesive energy density i. e. solubility parameter of coal is estimated from solvent extraction or swelling equilibrium with solvent . It is stressed the fact that the physico chemical behaviours described above are correlated with compatibility between coal, coal blends and solvent.
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  • Recent Studies on the Chemical Structure of Solvent Refined Coal
    Yoshio Kamiya
    1978 Volume 57 Issue 1 Pages 13-20
    Published: January 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.13
    JOURNAL FREE ACCESS
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    Fundamental reactions in coal liquefaction process in the presence of hydrogen-donor solvent was explained, and the effect of coal property along with reaction conditions such as temperature, time and solvent on the chemical structure of SRC was briefly reviewed. Recent progress on the separation tequniques and chemical analysis made clear that SRC was composed of many fractions from oils to asphaltols with high aromaticity. The fate of oxygen-containing structure during the coal liquefaction process was also discussed.
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  • Dissolution Reaction of Coal by Hydrogen-donating A romatic Solvents (II)
    The Effect of Phenolic Compounds
    Hiroki Sato, Yoshio Kamiya
    1978 Volume 57 Issue 1 Pages 21-28
    Published: January 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.21
    JOURNAL FREE ACCESS
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    In order to clarify the effect of oxygen-containing compounds on the liquefaction of coal, four kinds of coal were treated with a mixture of tetralin and 1-methylnaphthalene at 435°C and initial hydrogen pressure of 20kg/cm2 for 30mins.
    It was found that phenolic compounds have a remarkable accelerating effect on the coal conversion depending on the coal charactor. The effect of phenols can be ascribed to the promotion of the scission of ether linkage according to the solvation and hydrogen donation to phenoxy radical, although some physical effect such as solvation or solubi-lity of the coal matrix can not be discarded. Phenolic compounds increase the coal conversion without increasing consumption of hydrogen and phenols, suggesting that very selective hydrogen donation is occuring.
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  • Hydrogasification of Liquid Ammonia-treated Coals
    Comparison of Several Japanese Coals
    Toshiaki Matsunaga, Yoshiyuki Nishiyama, Yasukatsu Tamai
    1978 Volume 57 Issue 1 Pages 29-37
    Published: January 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.29
    JOURNAL FREE ACCESS
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    The liquid ammonia-treated coal shows a large reactivity in hydrogasification, when catalyzed by nickel. In this paper, the reactivity was compared for six Japanese coals, the carbon content of which ranged from 75% to 87% daf.
    The coal specimens were heated in a thermobalance in a stream of hydrogen, ca. 100cm3 (STP) /min, up to 1, 000°C, and the rate of methane formation was measured by a gas chromatograph.
    The rates of methane formation of the coals treated with liquid ammonia at 120°C and then impregnated with nickel catalyst (TC coal) were compared with those of the untreated original coal (UN) or of the nickel-impregnated coal without the liquid ammonia treatment (UC).
    The UC and TC coals presented large peaks of methane formation at ca. 350°C and above 800°C, in addition to peaks between 400°C and 750°C, which were common to every specimen. The rates of methane fromation of TC coals at the high temperature region were significantly large compared with those of UC coals, which suggests that the effect of the liquid ammonia treatment is to raise the reactivity of catalytic hydrogasification. This reactivity became higher as the carbon content of the original coal increased, so far as the coals examined here were concerned. The effect of caking property was also discussed.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1978 Volume 57 Issue 1 Pages 38-42
    Published: January 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.38
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1978 Volume 57 Issue 1 Pages 43-60
    Published: January 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.43
    JOURNAL FREE ACCESS
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