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Volume 55, Issue 9
Displaying 1-8 of 8 articles from this issue
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[in Japanese]1976 Volume 55 Issue 9 Pages 727-728
Published: September 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (307K) -
Tetsuo Noguchi1976 Volume 55 Issue 9 Pages 729-737
Published: September 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe recent R& D on solar energy application and their perspectives as well as their technical problems are surveyed. The topics on solar energy application in advanced countries are mainly concerned with solar thermal conversion, photovoltaic conversion, and solar heating, cooling and hot water supply etc., however, those of developing countries are quite different to the items for developed countries.
The worldwide overview on solar energy researches and present status on the solar energy programs in the Project Sunshine are also related.View full abstractDownload PDF (1556K) -
Shigeru Tamanuki1976 Volume 55 Issue 9 Pages 738-748
Published: September 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSWork on fluid fuel mixed by pulverized coal and petroleum has been done for a long time and has succeeded in small-scale use. However, bulk utili-zation of mixed fluid fuel as energy will be available without trouble in full cycles of production, transport, storage and burning only after the new technology to grade up its quality from mere oil mixed with coal to colloidal fuel is achieved. Coal has been highlighted since the oil crisis in 1973. Development of colloidal fuel technology is urgent not only for Japan but for the other countries.View full abstractDownload PDF (1801K) -
Kazuyoshi Kudo, Kiyoshi Terada, Akira Yokogawa, Mitsuyuki Mitooka, Mik ...1976 Volume 55 Issue 9 Pages 749-755
Published: September 20, 1976
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSThis report describes the comparison of various pretreatment methods of asphalt to obtain an intermediate product prior to activation from asphalt, socalled char.
First, although the activation of carbonized asphalt was put to the test, activated char was not suitable to be used as activated carbon because of lower yield, small specific surface area and small adsorbability. Second, although the activation of air oxidized petroleum coke was put to the test, the result was not more desirable compared with the activation of carbonized asphalt. Therefore, it was considered that the activation of char such as air oxidized petroleum coke obtained by air oxidation or carbonization was not suitable to produce activated carbon from asphalt. Third, sulfuric acid treatment of asphalt was put to the test.
As a result, it was confirmed that non-caking char, which was more suitable for activation, was obtained with the yield based on asphalt of about 140wt. % by this method and that high quality activated carbon was produced by activation of this char.View full abstractDownload PDF (1039K) -
Kazuyoshi Kudo, Kiyoshi Terada, Akira Yokogawa, Mitsuyuki Mitooka, Kat ...1976 Volume 55 Issue 9 Pages 756-759
Published: September 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSPropane-deasphalted asphalt (PDA) was sulfonated by sulfuric acid in absence of solvent to get an intermediate product prior to activation from asphalt, so-called char.
Sulfonation of PDA proceeded satisfactorily at 100°C.
The suitable reaction period was one to two hours.
When the concentration of sulfuric acid was higher than 95 wt. % and the weight ratio of sulfuric acid to PDA was seven to one, the yield of char was higher than 120 wt. % based on PDA and its total ion exchange capacity was larger than 3 meq/g.
The more severe the sulfonation conditions were, the more vigorous the oxidation reaction proceeded than the sulfonation reaction, and the contribution of carboxyl or hydroxyl groups to the total ion exchange capacity of char became larger than that of sulfonic groups.View full abstractDownload PDF (591K) -
Kazuyoshi Kudo, Kiyoshi Terada, Akira Yokogawa, Mitsuyuki Mitooka, Kat ...1976 Volume 55 Issue 9 Pages 760-764
Published: September 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSPropane-deasphalted asphalt (PDA) was sulfonated by sulfuric acid in presence of solvent to produce activated carbon from asphalt.
Granulated char was obtained after sulfonation reaction by using solvent which belonged to one of alkylhalides such as methylenechloride, 1, 1, 2- trichloroethane or 1, 1, 2, 2-tetrachloroethane.
The yield of char gradually increased with the increase of amount of solvent. This effect was recognized even in case of using small amount of solvent.
It was clear that the yield of char was influenced considerably by the amount of sulfuric acid in the presence of solvent. The yield of char was about 10 wt. % higher in the presence of solvent than in the absence of it. Also, the total ion exchange capacity of char was larger in the presence of solvent.Therefore it was seen that the presence of solvent very much facilitated the sulfonation of PDA.
The required amount of sulfuric acid was less in the presence of solvent than in the absence of it; the weight ratio of sulfuric acid to PDA for the former was 3 or 4, but 7 for the latter to obtain the char with the yield based on PDA of 120 wt. %.View full abstractDownload PDF (728K) -
Yasuo Hirose, Teruo Kannari1976 Volume 55 Issue 9 Pages 765-772
Published: September 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDuring the recent years, much attention has been focussed on the proflem of NOx (oxides of nitrogen) emission from combustion systems. Since “Oil crisis” in 1973, both low pollution levels and high energy saving should be attained.
The burner describcd herein which is called “Self-Recirculating Gasification (SRG) Burner” and some preliminary results were reported in volume 52 (1973) of Jurnal of the Fuel Society of Japan.
Preheated air into the burner had a large effect on NOx emission levels from the convertional burner than on the SRG burner. The reduction of NOx emission from the SRG burner conpared to the conventional burner at a furnace temperature of 1350°C is summarised as follows:
60% for the air at room temperature, 70% for the preheatd air at 250°C, and 75% for tne preheated air at 400°C.
It can therefore be concluded that the SRG burner is one of the most effective means which can allow the energy saving and the air pollution control.View full abstractDownload PDF (1114K) -
[in Japanese]1976 Volume 55 Issue 9 Pages 773-776
Published: September 20, 1976
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSDownload PDF (478K)
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