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Volume 49, Issue 2
Displaying 1-7 of 7 articles from this issue
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[in Japanese]1970 Volume 49 Issue 2 Pages 55-56
Published: February 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (339K) -
Kiyoshi Morikawa1970 Volume 49 Issue 2 Pages 57-67
Published: February 20, 1970
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSThe corelation between the methods of preparation of supported nickel catalysts, their chemical and physical structures, and their catalytic activities and selectivities were investigated, experimentally, and many basic informations, were obtained giving further a new type of supported nickel catalysts which promoted only the hydrogenation of benzene nucleus but no hydro-decomposition of C-C bonds in hydrocarbons. The author proposed new methods of preparation of supported nickel catalysts, i.e. 1) instant precipitation of hydrogels from the supersaturated solutions of mixed mother compounds, and 2) cation exchange between bronsted acid on the surface of carriers, such as silica-alumina or oxidized active carbon, and transition metal cations of salt solutions. The catalysts thus prepared exhibited the similar selective activities described above. The active centers of nickel catalysts were attributed to the various kinds of crystal defects of nickel particles. Standing on the concepts of active centers, the methods of improvement of the selectivities and lives of supported solid catalysts were proposed, resulting in the prompt discoveries of the catalysts for the high pressure hydrogenation of kerosenes. Finally, the basic philosophies and mothodologies for the research works, especially those on catalysts and catalysis were summerized briefly. The similar presentation and discussions will be found in Advance in Catalysis, Vol.20, pages 198-232 (1969).View full abstractDownload PDF (1808K) -
Tokizo Takeshita1970 Volume 49 Issue 2 Pages 68-76
Published: February 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn accordance with the growing production of crude steel in this country which is anticipated to attain to 100 million ton within future several years, the unsteady state of coking coal supply and the increase in mining cost have become serious problems.
This paper, reviewing the relation between the production of iron and steel and the demand and supply of coke in the world, deals with the demand and supply of coking coal in our country together with the supplying capacity of overseas coking coal.
Under such conditions it is necessitated to promote the development of more advanced techniques for shortening the coke consumption as well as to secure steady importation of overseas coking coal.View full abstractDownload PDF (1315K) -
Kiroku Yamazaki1970 Volume 49 Issue 2 Pages 77-88
Published: February 20, 1970
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSThe conventional spark ignition engine is now the principal source of the air pollutant and the development of alternative nonpolluting power source for automobile is urgently expected.
The only economic alternative power plant available as a working and almost fully developed system is the external combustion engine with steam or another vapour as the working fluid following the Rankine cycle. The major virtue of external combustion engine is on almost complete free of emissions and on simplifications in power train design as they show excellent torque pattern at low speed eliminating or simplifying the transmission.
A system combining a small internal or external combustion engine with alternator inverter and battery will become technically feasible.
The potential of Stirling engine that can be operated by nuclear or solar energy other than chemical fuel energy is discussed. It is especially suitable where the noise should be killed.View full abstractDownload PDF (2872K) -
Futoru Yoshimura, Tsuneo Yoshii1970 Volume 49 Issue 2 Pages 89-97
Published: February 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSComperative i.r., ultimate analysis and yield of γ-fraction, pyridineor chloroform-extract from raw coal and coal preheaed at 250°C, 300°C, 350°C, 400°C, and 450°C have been examined respectively.
It was deduced that: (1) increase of extract from preheated coal is due to the exudation of bitumen from inside of coal, (2) the higher preheating temperature is, the more exudation of bitumen from occurs, (3) on the other hand, both of evaporation and thermal decomposition of extractive substance take place rapidly above 400°C of preheating temperature, (4) extract from coal preheated below 400°C scarcely contains the product of thermal decomposed coal, because i.r., ultimate analysis and yield of pyridine-extract or γ-frction and molecular weight of pyridine-extract from preheated coal are almost the same as those of corresponding extract from raw coal respectively.
From these deduction, it was infered that the maximum yield of chloroform extract at a certain temperature (for example 400°C) might appear by mutual relation between exudation and evaporation of chloroform-extract, and chloroform-extract from coal preheated below 400°C might be present in the raw coal as such.View full abstractDownload PDF (1031K) -
Shuichiro Higuchi1970 Volume 49 Issue 2 Pages 98-102
Published: February 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn the calorific value determination of fuel gases by water-flow calorimeter, the significant error is caused by lower and higher humidity of combustion air introduced to the calorimeter. To improve this disadvantage, humidity adjustable air humidifier was designed. Combustion air humidity is measured by wet- and dry-bulb psychrometer in the unit and controlled to desired humidity by two damper-type regulators fitted in dry and wetted air streams.
This controller is connectable to the Japanese Industrial Standards type calorimeter without any modification. And it was found that the error is eliminated almost completely by the humidity controller.View full abstractDownload PDF (574K) -
1970 Volume 49 Issue 2 Pages 106-109
Published: February 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (474K)
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