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Volume 59, Issue 4
Displaying 1-7 of 7 articles from this issue
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[in Japanese]1980 Volume 59 Issue 4 Pages 227-228
Published: April 20, 1980
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (413K) -
Yoshio KAMIYA1980 Volume 59 Issue 4 Pages 229-240
Published: April 20, 1980
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSCoal liquef action can be classif ied into two important steps;the f irst step is thermal decomposition of linking parts of coal structure units and subsequent stabil-ization of reactive f ragments by hydrogen donor solvents, and the second step is hydro-cracking of so called asphaltene structures.Theref ore, the yield and properties of coal oils depend largely on the reaction conditions, catalyst and f eed coal.The product distribution, analytical results and individual components of coal oils by several developing processes, that is, SRC-I, SRC-II, EDS, H-Coal and Synthoil, are briefly reviewed to clarif y the feature of reaction products.Naphtha f raction can be used as the high octane gasoline as well as the petrochemical f eedstocks after hydrotreatment and catalytic ref orming.Middle and heavy distillate f ractions are difficult to convert to ketosine or diesel f uel oil because of higher aromaticity and heteroatom contents, but can be used as f uel oil.View full abstractDownload PDF (1685K) -
Hiroshi OKA, Sadanobu INOUE, Mitsuo SASAKI1980 Volume 59 Issue 4 Pages 241-249
Published: April 20, 1980
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFor the explanation of the mechanism of peat-ammonia reaction, the reaction of peat humic acid with gaseous ammonia has been studied in comparison with the result from model substance for peat humic acid through the infrared spectrophotometric and chemical analyses of reaction products. The peat humic acids were prepared from Ishikarikanazawa reed peat and Toyotomi moss peat by extraction with 1 % sodium hydro-xide aqueous solution. The δ-lactone of o-carboxyphenylglyceric acid was used as the model substance of peat humic acid.
The reaction of humic acid with ammonia was carried out at 20°C f or 2hr. It was concluded that lactam configurations were f ormed from δ-lactone structure in peat humic acid by the reaction with ammonia, and carboxy groups in the humic acid were converted to the primary amide and a part of phenolic hydroxy groups to amine.Other nitrogen containing groups such as ammonium, nitrile, amidine, imino groups and iso-indol configuration was not f ound in the reaction products.View full abstractDownload PDF (1224K) -
Shinichi YOKOYAMA, Takeshi OKUTANI, Yoshihisa HASEGAWA, Roichi YOSHIDA ...1980 Volume 59 Issue 4 Pages 250-260
Published: April 20, 1980
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSMinerals in coal have been studied in some detail, but very little work has been done on the behavior of minerals in the course of heat treatment in air, that is, when coal is burned at high temperatures.In this study, the samples of mineral matter of f our Japanese coals were prepared by a low-temperature ashing technique by which the mineral matter from coal can be obtained in a relatively unaltered state.The low-temperature ash samples were then heated progressively from 400-130°C at 100°C intervals. Min-eral phases at each temperature interval were determined by X-ray dif fraction analysis.View full abstractDownload PDF (1392K) -
Ryonosuke ABE1980 Volume 59 Issue 4 Pages 261-269
Published: April 20, 1980
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSWhen coal is crushed in water and treated with 10 % CaCl2· 2H20 solution at room temperature, coal-humic acid calcium salt and HC1 are assumed to be produced in the reaction in the reaction vessel.After two minutes, an unsaturated fuel oil, equal to one-eighth of the coal in weight, is added to the reaction vessel and stirred vigo-rously for f our minutes.
In the vessel, the unsaturated fuel oil saturated with HCl is assumed to react with the coal-humic acid calcium salt.
After these treatments, the contents of the vessel are filtered using filter paper, and washed with pure water until the waste water becomes neutral.
These three chain-reactions in the vessel are not mere suppositions but are exactual reactions which can be analysed by infrared spectra.
On washing this chemical compound of coal and mineral oil with water and mixing it at 80°C in a ball mill with heavy oil, a homogeneous fuel oil is produced.This artifical fuel oil containing 30% coal, is very stable and no depositing of compounds is observed even when left standing for 63 days at 45°C .View full abstractDownload PDF (1039K) -
Studies on Various Conditions for Combustion and Desulfurization in FurnaceYoshiro MORITA, Hiroshi IKEDA, Yoshinori KONDO, Eiichi KIKUCHI1980 Volume 59 Issue 4 Pages 270-276
Published: April 20, 1980
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFluidized bed combustion has been investigated as an environmentally acceptable way f or utilization of residual oils with high sulfur and nitrogen contents.Dol-omite and limestone were used as bed materials which were able to absorb oxides of sulfur.Dolomite had higher ability than limestone to promote combustion and to remove SOx in combustion flue gases according to the following reaction;CaOd-SO2+1/2O2=CaSO4·Optimum temperature for desulfurization was determined to be 850°C for both dolomite and limestone.Combustion efficiency decreased with increasing degree of heaviness of oil.View full abstractDownload PDF (834K) -
[in Japanese]1980 Volume 59 Issue 4 Pages 277-289
Published: April 20, 1980
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1972K)
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