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Volume 29, Issue 1-2
Displaying 1-19 of 19 articles from this issue
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[in Japanese]1950 Volume 29 Issue 1-2 Pages 1
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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S. Tachikawa, H. Hosho1950 Volume 29 Issue 1-2 Pages 2-7
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS-In order to elucidate the wettability of various coals, two series of experiments for calculating the work of wetting witn H2O and C6H6 were carried out.In first series of the experiments, the contact-angles of powdered coals were measured by Bartell-Cell method, concluding that the wettabillty increased with the ash-content and that brown coals or anthracites were better, wettable than bituminous coals which gave rather -indefinite values.-in the second series, the calorimeter method was used to determine the relationship between the heat of wetting and the time of drying as, well as the ash content of coal.The heat of wetting was proportional to some powers of drying time and the coals examined were classified into several groups, which members having.the comparable values of the calorific power and the -heat of wetting.View full abstractDownload PDF (933K) -
R. Shioda1950 Volume 29 Issue 1-2 Pages 7-15
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS-Some of the laboratory tests on the Hirai lignite were carried out prior to the design of the carbonisation furnace and then a new plant with an i-nternal heating system was coustructed, in which the hot gas, being prepared in a seb.erate furnace was-supplied for heating.In this system, besides.the sensible heat of the gas, some heat of combustion was also utilizable, which was set free from the partial combustion of the charged lignite with the oxygen included in the heating gas.The results obtained, however, showed that the charges were not uniformly carboni-sed and so, the system of self-coking without a heating gas was also tried during the whole period except starting.Compared with the former system, the latter was shown to have an advantage of making good semi-coke, but a disadvantage of lowering the capacity of the furnace.View full abstractDownload PDF (1575K) -
Y. Ban1950 Volume 29 Issue 1-2 Pages 16-19
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS-It was reviewed the recent trends of the coal consumption and the related fuel policies in the United States of North America.The author pointed out that -the coal consumption for railway transportations had gradually decreased since 1944, owing to the developments of Diesel engine and pulverized coal-combustion gas turbine, that the synthetic petroleum production scheme, introduced into the Diet by Mr.Krug, the Secretary of the Interior, had intended to cover about 40% of the natural petroleum production and that some experimental studies to produce the high quality coke, adequate to iron manufacturing, from low grade coal had been carried out.In comparison to those trends in U.S.A., the author briefly forecasted the future aspects.of coal utilization and its studies in Japan.View full abstractDownload PDF (732K) -
T. Kakita1950 Volume 29 Issue 1-2 Pages 20-24
Published: February 28, 1950
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESS-The author described the details of the slug tapping type gas producers, which had been used at the Konan and Agochi factories.The gas producer used at K-Onan was a continuous gas_producing type using oxygen blast.At first it was expected to utilize the semi coke made from North Korean coal and electrolytic oxygen, but in the practical operation it was used to manufacture H2 gas for the synthesis of ammonia.Another set at Agochi was designed on the basis of the ex-periences at KOnan but it was rather a peculiar one, adopting the gas circulating process investigated by Mr.KudO, and it was used in the manufacturing of H2 gas from the semi coke made from North Korean coal, which contained a large quantity of ash of high melting point, in the service to the coal hydrogenation plant.The slug tapping type gas producers had those properties (i) the capacity was large, (2) the construction was simple, (3) even the coke rich in ash was easily gasified and (4) the high utility of arbon was attained.View full abstractDownload PDF (970K) -
T. Ichimura1950 Volume 29 Issue 1-2 Pages 25-33
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS-Setting the simultaneous equations from several reactions in gas pro-ducer, the author (1) induced the equations of isothermal equilibrium by means of statistical mechanics and found the equilibrium constant as the function of volume and temperature of blast, (2) obtained the equations of thermal equilibrium by regarding these reactions as quasi-adiabatic changes, (3) discussed the constant of reaction velocity by using the Arrhenius' equation.Furthermore, the author described about the relation, between the volume as well as the temperature of blast and the quantity of gas produced, and also about the influence of the reactivity of coke on the rates of decomposition of H2O as well as formation of CO.View full abstractDownload PDF (1461K) -
S. Ando, T. Kobayashi1950 Volume 29 Issue 1-2 Pages 34-42
Published: February 28, 1950
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSThree methods were compared with in the preparation of heavy oil B from low temperature tar; (1) treatment with crude petroleum, (2) treatment with dilute sulfuric acid and (3) simultaneous treatment with crude petroleum and dilate sulfuric acid.The results showed that the most part of asphalthen were precipitated by mixing low temperature tar with some crude petroleum, alone or blended with a certain amount of dilute sulfuric acid, prior to distillation, so the distillate became very stable and was utilizable as heavy oil B.View full abstractDownload PDF (1308K) -
1950 Volume 29 Issue 1-2 Pages 43
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 43c-44
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 44
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 43a
Published: February 28, 1950
Released on J-STAGE: May 16, 2013
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1950 Volume 29 Issue 1-2 Pages 43b-44
Published: February 28, 1950
Released on J-STAGE: May 16, 2013
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1950 Volume 29 Issue 1-2 Pages 44a
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 44b
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 44c
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 45
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 45a
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 45b
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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1950 Volume 29 Issue 1-2 Pages 46-48
Published: February 28, 1950
Released on J-STAGE: June 28, 2010
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