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60 巻, 5 号
選択された号の論文の8件中1～8を表示しています
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吉川 彰一1981 年 60 巻 5 号 p. 313-314
発行日: 1981/05/20
公開日: 2010/06/28
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戴 和武, 欧陽 淵, 活 恵正, 周 沢興1981 年 60 巻 5 号 p. 315-320
発行日: 1981/05/20
公開日: 2010/06/28
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山川 敏雄, 伊牟田 和敏, 佐藤 芳樹, 山下 安正, 伊藤 秀伸1981 年 60 巻 5 号 p. 321-332
発行日: 1981/05/20
公開日: 2010/06/28
ジャーナル フリーNon-catalytic extraction of Taiheiyo coal, a subbituminous coal, was carried out by using a 500 cc autoclave under hydrogen pressure.And some properties and structural indices (see Table 5 and 6) were investigated to discuss the extraction and disinte-gration process of coal.
As shown in Fig.2, maximum extraction yield was obtained at 420°C of 30 min reac-tion period under 80kg/cm2G initial hydrogen pressure.
In this case, 0.46 gr molecular H2 per 100 g coal was consumed and 2.37 wt% of coal was converted to gaseous products which consisted mainly of CH4.Average molecular weight of the extracts decreased with progress of extraction and disintegration.
The structural indices and molecular weight of the extracts indicate that the extracts are composed of dimer of the structural unit which consists of three aromatic rings and two naphthenic rings.抄録全体を表示PDF形式でダウンロード (1330K) -
木庭 敬一郎, 坂田 康二, 井田 四郎1981 年 60 巻 5 号 p. 333-344
発行日: 1981/05/20
公開日: 2011/02/23
ジャーナル フリーTen coals were carbonized under various pressures (30 mmHg, normal pressure and 100 kg/cm2), optical anisotropic textures of their cokes being modified.The extent of optical anisotropy increased greatly with increasing carbonization pressure, such a trend being significant with lower rank coals.The physical structures were also influenced by the carbonization pressure.Gasification reactivities of the cokes with carbon dioxide and steam (1, 200°C) were tried to correlate with their optical anisotropy and physical structure. Gasification reactivities of respective optical textures were estimated by both point-counting technique and regression analysis.Reactivities of the same optical textures in the cokes pro-duced from the same parent coal were roughly same, however they considerably diverse when compared as for different parent coals.Although the values estimated by regression analyses were consistent to those by the point-counting except for those of leaflet and inert texture, the physical situations of respective textures were deduced to be important for the quantita-tive discussion of their reactivities.抄録全体を表示PDF形式でダウンロード (1570K) -
佐々木 稔, 肥田 行博, 伊藤 薫, 岡崎 潤1981 年 60 巻 5 号 p. 345-353
発行日: 1981/05/20
公開日: 2010/06/28
ジャーナル フリーIn order to decrease the NO emission from the sintering machines of iron ores, a new heat treatment of coke breeze called “Partial Combustion Method ”was tried on a small scale.
The decrease in the nitrogen content of coke was 25-35%under the conditions where about 18%of carbon in a coke particle was consumed by combustion to CO2 and then this hot CO2 gasified almost the same amount of carbon in other coke particles at the temperature of about 1400 °C.
The porosity of coke increased remarkably because the tubular pores of over 10 microns in diameter grew by the gasification with CO2 and small ones of under 10 microns were formed as a result of the vaparization of the ash component.
In the sintering process using the treated coke breeze, NO formation was reduced more than the removal of nitrogen from coke and the degree of NO reduction became up to about 60%.
The analytical results on the relation between the pore structure and the CO, NO for-mation during combustion of coke showed that the decrease in the conversion ratio of organic nitrogen to NO was caused by the high porosity of coke.抄録全体を表示PDF形式でダウンロード (1641K) -
細孔構造に対するサランの炭化温度および熱処理過程における昇温速度の影響結城 仲治, 北川 浩1981 年 60 巻 5 号 p. 354-359
発行日: 1981/05/20
公開日: 2011/10/21
ジャーナル フリーThe molecular sieve properties and porous structure have been studied for molecular sieving carbon prepared from Saran waste.The Saran char was granulated into sphere, whose diameter being 0.7 mm, by the addition of 23.1 wt % of coal tar pitch and 7.5 wt % of microcrystalline cellulose.Then spherical pellets were heat-treated in a stream of nitrogen.
It was found that the carbonization temperature of Saran had no significant effect on the adsorption properties of molecular sieving carbon in the temperature range 600-900 °C.The limiting volume of adsorption space for butane increased with increase of the heating rate of spherical pellets.Molecular sieving carbon from Saran waste adsorbed benzene (3.7 A in thickness, 7.0 A in width), while it did not adsorb isobutane (5.0 A in diameter).These results demonstrate that the pores of molecular sieving carbons are slit-shaped.抄録全体を表示PDF形式でダウンロード (645K) -
山本 格, 田中 芳雄, 佐々木 正治, 服部 久雄1981 年 60 巻 5 号 p. 360-375
発行日: 1981/05/20
公開日: 2010/06/28
ジャーナル フリーLife tests of stainless steel heat pipes containing sodium working fluid were carried out at evaporator surface temperatures of 600 °C, 650 °C and 700 °C for 1, 200 hours in ambient enviroments and during the tests, the change of the thermal resistance of each heat pipe was examined.After finish of each the test, the containers were cutt off and corrosion at the each part of the containers and wicks was examined through X-ray analizer, metallurgical microscope etc.
Heat pipes were fabricated from sus 316 L stainless steel with 50 mesh 2 layers screen wick of same material.The total length of the heat pipe was 1, 000 mm will 25 mm diam-eter and the length of heating zone by Ultra-gold furnace was 265 mm, adiabatic zone was 235 mm and the remainig part was the condensor.
The following became clear after the examination:
1) Cr crystal substance was deposited on the inner surfaces of the containers and the wick surfaces due to elution or precipitation of some Cr from the containers and mesh wicks.
2) Selecting crystal boundary corrosion was observed at the wick and the nozzle on the heating side.
However it is clear that such least amount of corrosion will not affect the life of heat pipes.抄録全体を表示PDF形式でダウンロード (4040K) -
燃料協会1981 年 60 巻 5 号 p. 376-386
発行日: 1981/05/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (1841K)
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