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 2
Displaying 1-6 of 6 articles from this issue
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  • Fractional Compositions and Their Chemical Structure of Petroleum Heavy Residue
    Hiroshi Iijima
    1978 Volume 57 Issue 2 Pages 75-86
    Published: February 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.75
    JOURNAL FREE ACCESS
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    SYNOPSIS: -Fractional compositions and their chemical structure of petroleum heavy residua obtained by various processings such as vacuum distillation, solvent ext-raction, air-blowing, thermal modification and thermal cracking were reviewed. It was shown that fractional compositions and their chemical structure have a effect on colloidal nature or rheological behavior of petroleum heavy residue.
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  • Heavy Oil Cracking Process for Production of Olefins
    Yoshihiko Shohji
    1978 Volume 57 Issue 2 Pages 87-95
    Published: February 20, 1978
    Released on J-STAGE: October 21, 2011
    DOIhttps://doi.org/10.3775/jie.57.87
    JOURNAL FREE ACCESS
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    SYNOPSIS: -Crude oil and residual oil cracking processes for production of olefins are dirided into four groups, according to the methods of preventing coking trouble in the reactoor.
    i) The superheated steam cracking process has an advantage of cracking oils at high temperature and in short residence time, but has a disadvantage of the difficulties in heat recovery.
    ii) The cyclic cracking process has wide flexibility in the choice of feed oils, but the construction cost is rather high.
    iii) The fluidized bed autothermic or partial oxidation process has an advantage of minimal coking trouble, but has a disadvantage of high olefine production cost due to oxygen consumption.
    vi) The circulating heat carrier fluidized bed process has also an advantage of mini-mal coking trouble, besides requires no oxygen. One of the technically important points of this process is how to get high efficiency in the circulation system of the heat carrier.
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  • Catalytic Cracking of Residuals
    Tomonori Shioiri
    1978 Volume 57 Issue 2 Pages 96-105
    Published: February 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.96
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    SYNOPSIS: -Compared with a normal gas oil charge, atmospheric residues are unfavorable feeds for an FCC unit because of their higher contents of Ni and V compounds, coke precursors and sulfur. To overcome these problems, several methodes have been proposed such as using zeolite catalysts and riser cracking reactor system, the low conversion operation, the demetallization process and the combination of desulfurization plus FCC. Recently new techniques have also been announced.
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  • On the Critical Process Problems by the Gasification of Residual Oils
    Hisashi Kono
    1978 Volume 57 Issue 2 Pages 106-116
    Published: February 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.106
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    SYNOPSIS: -The critical problems which are common by the various gasification processes of the heavy residual oils and coals were discussed from the chemical engineer-ing viewpoint.
    The fundamental and engineering approaches to these problems were proposed based upon the experiences of 250 t/d gasification plant.
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  • Utilization of Heavy Oil Carbonization and Carbon Materials
    Yuzo Sanada
    1978 Volume 57 Issue 2 Pages 117-131
    Published: February 20, 1978
    Released on J-STAGE: February 23, 2011
    DOIhttps://doi.org/10.3775/jie.57.117
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    SYNOPSIS: -Utilization of petroleum heavy oil has been reviewed. Processes and properties of delayed coke, fluid coke and pitch binder for metallurgical coke manu-facturing are especially focussed. The article includes that the fundamental studies on carbonization in respect to the mesophase formation clarify the characteristics and properties of the carbon materials above described.
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  • Solvolysis of Coal by Petroleum Vacuum Residue (IV)
    Solvolysis by Asphalt Pitch
    Kazuteru Osafune, Seiji Arita, Yasuhiro Yamada, Hitoo Kakiyama, Hidema ...
    1978 Volume 57 Issue 2 Pages 132-139
    Published: February 20, 1978
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3775/jie.57.132
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    SINOPSIS: -The solubilization of coals by solvolysis reactions was investigated using petroleum asphalt pitch prepared by heat-treated Khafji vacuum residue.
    It was found that the degree of solubilization was dependent on the rank of coal as well as reaction tempreture. Microscopic observations on the solvolysis pitches from Miike coal-asphalt pitch showed dissolution of coal particles into solvent (asphalt pitch). Among the coals examined, Miike coal (C: 82. 9%) was most efficiently solubilized into the asphalt pitch prepared at 420°C for 1 hr, when the solvolysis reactions were carried out in the tempreture range from 380 to 390°C.
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