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Volume 67, Issue 10
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[in Japanese]1988 Volume 67 Issue 10 Pages 813
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (224K) -
Makoto NAGATOMO1988 Volume 67 Issue 10 Pages 814-821
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA national space program of the government generally provides a firm base for prediction of the future space activities well until the end of this century. For example, the latest issue of the Japanese space program prepared by the government Space Activities Commission has authorized development of satellites to be operational by 1993 and advanced studies on later projects. For the long range plan, the Commission organized a special panel which reported that the Japanese space activities should include manned space activities and the government space budget should be in-creased by five times more than the current one.
The continuation of growth of world space activities can be indicated by the fact that the total number of artificial space objects and the annual human population in space are constantly increasing. Commercialization of space and manned space flight feature the current space activities in the world. The US and USSR emphasize space station for their main activities in space, and the European decid-ed to seek autonomous capability in the field of manned space flight.
Finally, a personal view on the prospect of space activities through the end of the next century is briefly introduced in connection with evolution of technological capability in space.View full abstractDownload PDF (993K) -
Yasuhiko ARAI, Yoshio IWAI, Hiroshi YAMAMOTO1988 Volume 67 Issue 10 Pages 822-833
Published: October 20, 1988
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSSupercritical extraction is expected as a promising separation process of coal li-quids because we should purify them to use coal derived components as the resources of speciality chemicals. The solubility data of coal derived components in supercritical fluid are essentially re-quired as the fundamental data to study the feasibility of separation process. The data source publish-ed in the literature is compiled here. Further, the correlation methods of the solubility are reviewed. It is emphasized that the entrainer effect is very important to enhance the solubility and the selectivity.View full abstractDownload PDF (1197K) -
Hiroki SADAMORI, Akio CHIKAZAWA1988 Volume 67 Issue 10 Pages 834-845
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDiffusive catalytic combustion burners are expected to develop as a new combus-tion technique because of their low NOx emission, high fire safety and high far infrared radiant effi-ciency. However, since a combustion catalyst capable of burning city gas, the most prevalent fuel, with its high methane content which means difficult oxidative problems for the catalyst, at high effi-ciency and high durability has not been developed, these burners are not widespread.
This report describes a new combustion catalyst with high activity and high durability developed by impregnating rhodium which features high methane activity, less sulfur poisonig and less SO3 production, within the pores of the porous alumina fibers.View full abstractDownload PDF (1815K) -
Nobuyoshi NAKAGAWA, Chiaki KURODA, Masaru ISHIDA1988 Volume 67 Issue 10 Pages 846-855
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSElectrode impedance of air, baked paste-platinum/yttria-stabilized zirconia was measured and the effects of annealing and cathodic and anodic current treatments on the elec-trode/electrolyte interface were examined.
Depressed semi-circles on a complex impedance plane were simulated quite well by a model with electrode reaction resistance, Ri, capasitance, C, and Warburg-impedance, W (=S/ω√-jS/ω√), in parallel. It was found that Ri and S were inversely proportional to the apparent electrode area and that C was proportional to the area. And it was derived thet the degree of depression of semi-circles was expressed uniquely by a parameter φ defined as Ri/CS2.
By examining the changes in Ri, S and C for the annealing or currents, it was deduced that an-nealing and anodic current induce the change in the structure of the electrode/electrolyte interface and that cathodic current induces the change in the composition of that interface. It was also shown that even the gravity of fine wire for leading current affects the structure of the interfaceView full abstractDownload PDF (1020K) -
Effects of Hydrophobic Chain Lengths in Normal Alcohols on Water Content and Particle Size in W/O Type Emulsions-Masahiko ABE, Hiroshi NISHINO, Keizo OGINO1988 Volume 67 Issue 10 Pages 856-860
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe effects of hydrophobic chain lengths in normal alcohols on the particle size and the water content in W/O type emulsions have been investigated.
Adding alcohols to the solution of nonionic surfactants containing shorter alkyl chain and/or longer POE chain resulted in the increasing of water content and the decreasing of particle size of W/O type emulsion. With decreasing alkyl chain in alcohol molecule, the water content and particle size in W/O type emulsions increased. These addition effect of alcohols was considerably recognized in the case of nonionic surfactant in which has a strong hydrophilic group.
This may be due to that adding alcohols to the solution influences on adsorptive state of surfac-tant at interface between water and oil; molecules of nonionic surfactant per unit emulsion decrease; as a result, the numbers of emulsion increase.View full abstractDownload PDF (556K) -
Tatsuo MIYADERA1988 Volume 67 Issue 10 Pages 861-868
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe reaction of nitric oxides with methane, ethane, propane and n-butane was investigated in the heating temperature range 900-1100°C using a tubular flow reactor.
In one-stage reaction, the conversion of NOx was accelerated at air ratio below 1.0 and the per-cent of conversion of NOx to HCN increased with the decrease of air ratio. The intermediate products were oxidized by adding secondary oxygen and by reheating. They were oxidized completely at reheating temperature above 1100°C and at residual oxygen concentration above 0.5‰. It was sug-gested that both NO regeneration and N2 production were taking place on oxidation of HCN. The ratio of NO regeneration increased at higher oxygen and lower NOx concentration, and the percent of NOx reduction in two-stage reaction decreased. Propane and n-butane showed higher percent of NOx conversion and reduction than methane and ethane at high primary air ratio. The percent of NOx con-version increased with the increase of concentration of hydrocarbon. The maximum percent of NOx reduction was obtained at concentrations of propane 0.33-0.67‰ or n-butane 0.25-0.5‰. The ef-fect of first-stage temperature, gas flow rate, CO2, SO2 and H2O was also investigated.View full abstractDownload PDF (858K) -
Tatsuo MIYADERA1988 Volume 67 Issue 10 Pages 862-868
Published: October 20, 1988
Released on J-STAGE: February 13, 2012
JOURNAL FREE ACCESSThe reaction of nitric oxides with methane, ethane, propane and n-butane was investigated in the heating temperature range 900-1100°C using a tubular flow reactor.
In one-stage reaction, the conversion of NOx was accelerated at air ratio below 1.0 and the per-cent of conversion of NOx to HCN increased with the decrease of air ratio. The intermediate products were oxidized by adding secondary oxygen and by reheating. They were oxidized completely at reheating temperature above 1100°C and at residual oxygen concentration above 0.5‰. It was sug-gested that both NO regeneration and N2 production were taking place on oxidation of HCN. The ratio of NO regeneration increased at higher oxygen and lower NOx concentration, and the percent of NOx reduction in two-stage reaction decreased. Propane and n-butane showed higher percent of NOx conversion and reduction than methane and ethane at high primary air ratio. The percent of NOx con-version increased with the increase of concentration of hydrocarbon. The maximum percent of NOx reduction was obtained at concentrations of propane 0.33-0.67‰ or n-butane 0.25-0.5‰. The ef-fect of first-stage temperature, gas flow rate, CO2, SO2 and H2O was also investigated.View full abstractDownload PDF (809K) -
[in Japanese]1988 Volume 67 Issue 10 Pages 869-881
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1181K) -
[in Japanese]1988 Volume 67 Issue 10 Pages 885
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (295K) -
[in Japanese]1988 Volume 67 Issue 10 Pages 886
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (110K) -
[in Japanese]1988 Volume 67 Issue 10 Pages 887
Published: October 20, 1988
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (154K)
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