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Volume 49, Issue 11
Displaying 1-7 of 7 articles from this issue
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[in Japanese]1970 Volume 49 Issue 11 Pages 791
Published: November 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (297K) -
Toshimasa Tanai1970 Volume 49 Issue 11 Pages 792-802
Published: November 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSYNOPSIS: -For the formation of coal deposits certain conditions in which the sediments including plant remains accumulated are first necessary; they are essen-tially the development of the coal basin and suffiicient supply of plant materials. Subsi-dence of the basin and climate adequate for plant growth might be ultimately influenced by tectonic control through the ages. Throughout the world coals occur in scattered localities in each of the major post-Silurian stratigraphic subdivisions. The distribution of the coal fields is discussed in the relation with tectonic parts of the earth crust.
The coal fields of the world are grouped into three types: the orogen (marginal sinking and interior deep), shelf (stabile and labile shelves) and kratogen (marginal district and interior trough) types. The coal fields of each type are also characterized by sedimentary facies, coal reserves and geologic structures. Our knowledge of coal-forming plants is obtained mainly from plant fossils found in the strata above and below the coal seams, and partly from coal and coal balls. On the basis of these sufficient informations the vicissitude of the past forests was first summarized. The considerable formation of workable coal seams in the world corresponds to the flourishment of land plants in the past. Some problems concerning the coal-forming plants of Late Paleozoic and Tertiary coals are discussed.View full abstractDownload PDF (1840K) -
Sadaharu Toyoda1970 Volume 49 Issue 11 Pages 803-815
Published: November 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSINOPSIS: -Several interesting results on ESR of coal by various researchers were described according as the titles as follows. “Extracted substance, mechanical treatment, petrographical constituents, reversible and irreversible oxygen effects” and some of the results of ESR on coal was explained in relation with the structure of coal. ESR on coal was explained in relation with the structure of coal.View full abstractDownload PDF (1628K) -
Mitsuru Tate1970 Volume 49 Issue 11 Pages 816-824
Published: November 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSYNOPSIS: -To clarify the social background and the technical foundations of “New Iron-making Processes” which have become current topics, a short history of the development of “Iron-making Processes without help of Blast Furnace” was traced and the attainments of the progress of these processes in the 1960's were summerized. Specially with regard to electric steelmaking process from reduced pellets as well as so-called iron-making plans with use of atomic energy, an outline of their aims and contents was given. Finally it was pointed out that the most urgent problem for Japanese Steel Industry was not to replace the existing process with “New Process”, but to improve the former still more, that is to say, to decrease coke (or coking-coal)-consumption in blast furnace operation as much as possible.View full abstractDownload PDF (1635K) -
Katsuhiko Wakabayashi1970 Volume 49 Issue 11 Pages 825-836
Published: November 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSYNOPSIS: There have been a number of studies on the hydrodesulfurization catalysts, because it is an important process to remove sufur compounds from liquid petroleum fractions. However, there seems to be no evidence of elucidating what is the active species in the catalysis.
The object of this article is to review the investigations of the activities and chemical structures of the catalysts employed in the hydrodesulfurization of organic sulfur compounds.
The activities of the catalysts are dependent upon the method of catalyst preparation as well as the composition of their components. Generally, each component of active catalysts consisting of the mixed system is inactive by itself for the hydrodesulfurization. Therefore, it is likely that new compounds may be formed in the fresh or in the sulfided catalysts. One of highly active catalysts is composed of Co-Mo-γ-Al2O3. Thus, mainly with respect to this catalyst, the chemical structure and reaction mechanism are elucidated and discussed.View full abstractDownload PDF (1670K) -
Nobuyuki Kita, Yoshiya Fuse, Hisashi Iwai1970 Volume 49 Issue 11 Pages 837-849
Published: November 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSYNOPSIS: -Smoke generation from various kinds of synthetic material; plastic, synthetic fiber and synthetic rubber has been investigated by burning tester for building materials.
By means of illuminated photo-electric cell, the reduction invisibility in the smoke chamber is measured, and smoke development is indicated as the attenuation coefficient.
The synthetic materials were classified according to the smoke developed.View full abstractDownload PDF (1183K) -
1970 Volume 49 Issue 11 Pages 855-862
Published: November 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1040K)
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