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Volume 58, Issue 1
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[in Japanese]1979 Volume 58 Issue 1 Pages 1
Published: January 20, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (229K) -
Yoshio KAMIYA1979 Volume 58 Issue 1 Pages 2-10
Published: January 20, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAlthough iron and tin compounds were well known as the classical catalysts for the coal liquefaction, recent interest has been focussed on the various petroleum catalysts being developed for the hydrodesulfurization of heavy oil fractions.
It has been clarified that the deactivation of catalysts due to carbon deposit and mineral matters of coal take place strongly in the coal liquefaction process. Therefore, Some new processes being developed in USA do not use any catalysts except mineral matters from coal.
The effect of mineral matters of coal, metallic chlorides and hydrodesulfuriza-tion catalysts for petroleum were compared and discussed according to the recent publications.View full abstractDownload PDF (1024K) -
Tetsuo YAMADA, Tsuneyuki HOMMA1979 Volume 58 Issue 1 Pages 11-17
Published: January 20, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe catalytic effects of alkaline earth acetate on oxidation reaction between char made from phenol-aldehyde resin and carbon dioxide has been investigated by thermogravimetry and X-ray diffraction method.
For examination of the catalytic activity of alkaline earth metal, thermogra-vimetric (TG) curves of mixture of char and alkaline earth acetate were measured at 10°C/min to 900°C in carbon dioxide, and weight decrease and rate of weight cderease of oxidation reaction were obtained from TG curves.
As the results, it has been shown, the degree of weight decrease in the TG curves became larger in the following order, Calcium, Strontium and Barium acetate. The catalytic activity of Magnesium salt was recognized very little. As the concentration effect of these metal in the char, the degree of weight decrease by oxidation reaction on char became larger with increase of the concentration when the concentration of Calcium or Strontium metal was under 1% and that of Barium metal under 5%, while above these concentration the increase of weight decrease in each TG curves became negligible. And from the examination of the catalytic mechanism by the data of TG curves and X-ray diffraction in helium or carbon dioxide, it was suggested that alkaline earth metals repeat the cycle of oxide-carbonate.View full abstractDownload PDF (1122K) -
Experimental Methods and Reaction of Newdell CoalKazutoshi IMUTA, Yoshiki SATO, Ikuo SAITO, Toshio YAMAKAWA1979 Volume 58 Issue 1 Pages 18-26
Published: January 20, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA laboratory reactor system has been developed for the determination of products obtainable from the flash heating of raw coal in hydrogen at pressures up to 150kg/cm2G.
The effects of reaction time, temperature and hydrogen pressure on the conversion and on the properties of the reaction products in the flash hydrogenolysis of Newdell coal (Australia) was examined.
The conversion increased with increasing the reaction time and temperature but has shown a tendency to decrease after longer reaction time.
The higher temperature and hydrogen pressure were raised, the shorter optimum reaction time, at which maximum extraction yield was obtained.
The highest value of conversion was obtained to be 34% (d.a.f. base wt%) at 550°C, 100kg/cm2G of hydrogen and 2sec.View full abstractDownload PDF (1131K) -
Rieko OHNISHI, Takashi MIYAZU, Jiro NITADORI1979 Volume 58 Issue 1 Pages 27-36
Published: January 20, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSInyerlaboratory experimental work has been undertaken at the 30 different laboratories to study the following items on the determination of nitrogen in coke.
1) Whether there occuers the significant difference between analytical values obtained by Semi-micro Kjeldahl methods using a catalyst mixture including selenum and that excluding it.
2) Whether the difference of analytical values is recognized between in Semi-micro Kjeldahl method and Semi-micro Gasification method. The comparative study of instrumental method were also undertaken for a reference.
The following conclusions were derived from the above experiment.
1) Significant bias between results obtained using two kinds of catalyst mixture (including or excluding selenum) in Semi-micro Kjeldahl method can not be observeed if the digestion is carried out carefully.
2) The analysis can be carried out more quickly and more precisely in Semi-micro gasification method than in Semi-micro Kjeldahl method.
This is recognized to be because the complete digestion of coke is relati-vely difficalt in Semi-micro Kjeldahl method.
3) It is considered that the difference of analyical values on coke suffered in high temperature between in Semi-micro Kjeldahl method and in Semi-micro gasification, derives from reason below.
a) Final titration is carried out in the condition of still insufficient digestion because the development of graphitization makes the digestion difficalt in Semi-micro Kjeldahl method.
b) The loss of nitrogen during the digestion usually taking a long time leads to the loweering of observed values.
c) As another possibility, there is not denying the existance of nitrogen which is not completely decomposed by the Semi-micro Kjeldahl method when coke suffered in high temperature is analysed.View full abstractDownload PDF (1143K) -
Tsuyoshi OGAWA1979 Volume 58 Issue 1 Pages 37-42
Published: January 20, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIdentification of discharged oils into the ser was carried out with the method of thin layer chromatography and it's fluorenscence scanning analysis.
Merck's activated silica gel plates with 0.25mm layer thickness was used in thin layer chromatography, and as the solvent for samples, methyl alcohol was used.
As the developing solvent, mixed solvent contained CH3COOH, C2H5OH and i-C3H7OH were used, and their ratio is CH3COOH: C2H5OH: i-C3H7OH=15: 25: 60.
The fluorescence scanning analysis was carried out by using Shimadzu's Dual-Wave length TLC Scanner CS-910.
The conclusion of experiments was as follows:
(1) It is able to identify the kinds of imported crude oils by their TLC scanning pattern.
(2) The scanning pattern of oils does not vary at least over about 15 days weathering terms.
(3) This method may be applied to identify the similarity of oils in discharge accidents of oily water into the sea.View full abstractDownload PDF (768K) -
[in Japanese], [in Japanese]1979 Volume 58 Issue 1 Pages 43-48
Published: January 20, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (618K)
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