Journal of the Fuel Society of Japan
Online ISSN : 2185-226X
Print ISSN : 0369-3775
ISSN-L : 0369-3775
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Volume 50, Issue 11
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1971 Volume 50 Issue 11 Pages 819
    Published: November 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.11_819
    JOURNAL FREE ACCESS
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  • Asphalt Treating Process
    Takaaki Yamaguchi
    1971 Volume 50 Issue 11 Pages 820-825
    Published: November 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.11_820
    JOURNAL FREE ACCESS
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    This paper describes the outline of the use of asphalt i. e. vacuum residue and solvent extracted asphalt in the future. In view of supply and demand of asphalt in Japan, surplus of asphalt production should be expected in these several years, and it is necessary to study the plan how to increase the asphalt demand and how soon to put into action of this plan.
    Significant methods to increase the demand of asphalt are coking and/or gasification, and in these points the problems are the developments of usage for the great deal of gases and high sulfure contained coke produced from the units.
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  • Needle Coke
    Kazunori Koyama
    1971 Volume 50 Issue 11 Pages 826-831
    Published: November 20, 1971
    Released on J-STAGE: February 23, 2011
    DOIhttps://doi.org/10.3775/jie.50.11_826
    JOURNAL FREE ACCESS
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    Calcined Petroleum Coke is used as a material for graphite electrodes in steel manufacturing, and also for Soderberg or prebaked electrodes in aluminum manufacturing.
    Due to ultra-high power operation of electric furnace which was recently developed in USA, highly improved specifications become necessary to graphite electrodes; especially lower electric resistivity, lower coefficient of thermal expansion etc. as compared to the traditional ones. Thus, the same specifications are required of Calcined Petroleum Coke as the material.
    As a result, a new type of Calcined Petroleum Coke was developed; that is NEEDLE COKE.
    Needle coke has extremely excellent characteristics both electrically and phisically, and therefore, is considered as an inevitable material for Ultra-high Power (UHP) electrodes.
    Needle coke is being manufactured in 4 plants in Japan, USA and UK. However their production does not meet the demand of the world. Moreover the production of UHP electrodes is expected to expand substantially in the future. Meantime it is predicted that this short-supply status will not be corrected soon since its material procurement is quite difficult.
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  • On the Combustion Noise
    Susumu Kotake
    1971 Volume 50 Issue 11 Pages 832-836
    Published: November 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.11_832
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    The mechanism of generation of the noise associated with combustion is theoretically considered to understand its acoustical features-acoustic intensity, its frequency spectrum and its directivity in connection with chemical reaction and associated heat release. Studies to date concerning combustion noise are also reviewed.
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  • Combustibility of Heavy Oil on Marine Diesel Engine
    Masashi Nagai
    1971 Volume 50 Issue 11 Pages 837-845
    Published: November 20, 1971
    Released on J-STAGE: October 21, 2011
    DOIhttps://doi.org/10.3775/jie.50.11_837
    JOURNAL FREE ACCESS
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    The combustibility of fuel oil and its related problems are important factors for the high super-charging and the improvement of the durability on marine diesel engine. Then, in this report, the general characteristics for the combustibility is explained throngh the effective rate of combustion been related by the rate of fuel in-jection, further the relation between the combustibility and the factors controlling it, such as the number, diameter and length of the fuel injection hole, the direction of fuel injection the form of combustion chamber, and the strength of the air swirl in the combustion chamber etc., and the lowering the quality of heavy oil and its related problems, such as the wears of the combustion walls, the troubles by the combustion remains etc., are mentioned on the low and medium speed diesel engines.
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  • Control of Oxides of Nitrogen in Automotive Emissions
    Shigeru Yanagihara
    1971 Volume 50 Issue 11 Pages 846-853
    Published: November 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.11_846
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    In the combustion process of of automotive engines, gas temperature of post-flame reachs so high that the formation of nitric oxide become rapid reactions. By 1976 in the U.S.A., emission rate of NOx from light duty vehicle will be restricted less than 0.4g/mile, however one can not yet find a conventional technique to meet the 1976 emission standard of NOx.
    As a practical applicatiion, exhaust gas recirculation and operation with far di-fferent air fuel ratio from stoichiometric ratio will be combined to decrease the NO emission. Usually, to decrease the NO emission the thermal efficiency goes down. Now, all combustion power plants have general difficulty to reduce the oxides of nitrogen, especially regarding the fuel economy.
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  • [title in Japanese]
    1971 Volume 50 Issue 11 Pages 862-866
    Published: November 20, 1971
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.50.11_862
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