巻号一覧
後続誌
52 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
- |<
- <
- 1
- >
- >|
-
山本 晴次1973 年 52 巻 5 号 p. 307
発行日: 1973/05/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (1814K) -
保田 尚1973 年 52 巻 5 号 p. 308-317
発行日: 1973/05/20
公開日: 2010/06/28
ジャーナル フリーDistrict heating and cooling projects are still in the early state of development in Japan. These projects, have a number of excellent features, such as prevention of air pollution and fire hazard in metropolitan areas and efficient use of energy.
This form of energy has aroused keen attention at a rapid pace especially in Tokyo, Osaka and Hokkaido, as a now urban energy.
The history of district heating and cooling project operators has been relatively new, numbering only ten today, but these operators have been regulated as public utilities since December 1972 pursuant to promulgation of the Heat Supply Industry Law.
This article analyzes the social backgrownd leading the popularization of district heating and cooling projects in Japan, as well as listing features of such schemes, explaining their relation with background circumstances and also referring to the history of district heating and cooling projects both in this country and abroad. It also deals with problems which district heating and cooling project operators, or heat suppliers, are facing and outlines what are stipulated in the Heat Supply Industry Law. The article also views the future of district heating and cooling projects in Japan.抄録全体を表示PDF形式でダウンロード (3964K) -
塚島 寛, 加藤 勉, 渡辺 弘行1973 年 52 巻 5 号 p. 318-324
発行日: 1973/05/20
公開日: 2010/06/28
ジャーナル フリーThe present report deals with the artificial coalification of Hokkaido coals such as Tokachi lignite, Tsuchiya lignite and Tenpoku coal under high pressure in order to make crear the mechanism of natural coalification.
About 20g of powdered sample of those coals was placed in the stainless steel autoclave of shaking type with 350-380ml of water and the air in the autoclave was replaced with methane. Then the powdered sample in the autoclave was heated at the constant temperature (300°C) and time (24hrs) under different pressure at about 300, 600 and 800kg/cm2.
As the results of proximate analyses, structural analyses according to van Krevelen's densimetric method, determination of oxygen containing groups and Lc (002) by X-ray diffraction, it could generally be concluded that those products were hardly affected by pressure at the range of 300-800kg/cm2, but the products prepared from Tokachi lignite, the lowest-rank coal, were affected a little and it seemed that variation during artificial coalification under lower pressure was rather larger than under higher pressure.抄録全体を表示PDF形式でダウンロード (943K) -
流動炉による中間試験工藤 一至, 細田 英雄, 本間 専治, 石橋 一二, 野田 良男, 三井 茂夫, 奈良 恭二, 佐々木 喜八郎, 辰元 克充, 小松 賢至1973 年 52 巻 5 号 p. 325-335
発行日: 1973/05/20
公開日: 2011/10/21
ジャーナル フリーThis paper describes the production of active carbon from coal (Sunagawa-Tokufun: 2mm under) using a pilot scale fluidized bed reactor system. The internal diameter of the reactor for carbonization and activation was 500mm∅ and 630mm∅ respectively.
As the energy source, combustion heat of the feed coal was used for the carboni-zation process and combustion heat of mine gas (CH4-conc. about 60%) was used for the activation process.
An exchangeable perforated plate used for the fluidizing of char was of an inverse conical type, with a pin hole diameter of 2 mm∅ and pin hole opening ratio of 2%. The fact that the perforated plate was exchangeable was favorable for long time operation.
The active carbon obtained from the experiments showed an internal surface area of 900-1, 000m2/g and a methylene blue adsorbability of 180-200mg/g. Thus it was found to be favorable for practical use as adsorbents.抄録全体を表示PDF形式でダウンロード (2995K) -
石炭を原料とする活性炭の製造法石橋 一二, 野田 良男, 三井 茂夫1973 年 52 巻 5 号 p. 336-344
発行日: 1973/05/20
公開日: 2010/06/28
ジャーナル フリーThe present investigation concerns with a manufacturing method of active carbon especially for liquid systems from coals by utilizing fluidize bed technique both for carbonization and activation.
Various coals in Hokkaido, i. e., Taiheiyo (non-coking) coal, Horonai (weak-cok-ing) coal and Sunagawa (weak-coking) coal were used as raw materials.
Temperature of the carbonization reactor of 155mm I. D. was self-sustained at a level between 400 and 900°C by utilizing heat evolved by the partial combustion of sample coals with air used as a fluidizing medium. Total pore volume of the produced chars was in a range between 0.3 and 0.8ml/g, which were much bigger than those of conventional chars (0.05-0.2ml/g) produced by thermal decomposition in an innert amosphere.
The produced chars were then activated by steam at a temperature between 700 and 900°C in a quartz tube reactor of 40mm I. D.electrically heated. Required activation times at 900°C for the present chars wers less than one hour, which were shorter than those for the conventional chars. Total pore volume of active carbon produced increased 1.5-3 times of that of the chars and was found to be bigger than that of a commercial active carbon for liquid systems.
A plot of the surface area against methylene blue adsorbability gave a straight line with the same slope for each activation product. Furthermore, the surface area occupied by micro-pores into which methlene blue molecules were impossible to penetrate was found to be constant regardless of carbonization and activation processes. Selection of raw material was thus found to be primarily important on the production of active carbon.
Since best result was obtained on a coal from the upper coal seam No.8 of Sunagawa, further investigation was performed on several coals from different coal seams of Sunagawa. It was found that each activation product had high methylene blue adsorbability of 200-290mg/g and large surface area of 800-1, 330m2/g. Therefore, Sunagawa coal was justified as a steady source for the mass production of active carbon of high quality.抄録全体を表示PDF形式でダウンロード (1018K) -
圧力法と重量法の検討藤森 利美, 納富 優, 浦辺 太郎, 石川 馨1973 年 52 巻 5 号 p. 345-353
発行日: 1973/05/20
公開日: 2010/06/28
ジャーナル フリーThe methods for the determination of carbon dioxide in coals are not specified in JIS M8813-1963, in disregard of the necessity for the correction of carbon present as carbonate in the ultimate analysis, etc.
The authors have studied on this methods and obtained the following conclusions.
1) The following modifications on the pressometric method proposed by ISO/TC 27 are effective in the improvement of repeatability of the method.
ISO/TC 27-490 E Modificated method
.Heating device of the reaction flask naked gas flame water bath (90°C)
Heating time of it 3 min. 5 min.
Cooling time of it 7 min. 9 min.
2) The significant difference is not observed between two means of the pressometric method (modified ISO/TC 27 490E) and the gravimetric method (ASTM D 1756). Therepeatability of the pressometric method is superior to that of the gravimetric method, and the apparatus and procedures of the former are simpler than that of the latter.The pressometric method, therefore, is suitable when the method for the determination of carbon dioxide will be specified in JIS M 8813.
3) The corrections for converting total carbon and oxygen values to organic ones calculated from the determined carbon dioxides of 25 samples are as follows:
for carbon…0. 01-0. 54% (ab.)
for oxygen …0. 03-1. 45% (ab.)抄録全体を表示PDF形式でダウンロード (900K) -
圧力法の分析所内・所間精度と適用範囲藤森 利美, 浦辺 太郎, 石川 馨, 似鳥 次郎, 桜井 康三, 遠藤 正1973 年 52 巻 5 号 p. 354-359
発行日: 1973/05/20
公開日: 2010/06/28
ジャーナル フリーThe authors have studies in the first report on the pressometric and gravimetric methods for the determination of carbon dioxide in coals and concluded that the modified pressometric method (ISO/TC 27-490) was suitable for the specification in JIS.
It is necessary to specify a scope and tolerances when a method is accepted in JIS. The authors, therefore, have studied for this purpose, and concluded as follows:
1) The carbon dioxide evolved when low rank coals which belong to class III (Subbituminous) and IV (Lignitic) in ASTM D 388 “Classification of coals by rank” are treated with hydrochloric acid does not usually originate from carbonate minerals. These low rank coals, therefore, should be omitted from the scope of the JIS.
2) Tolerances calculated from the results of interlaboratory experiment are shown in the next table with that of other standards. The precisions of this method are consi-dered as fairly good figure in comparison with that of other standards.
The draft JIS M 8813-1972 has been prepared based on the above studies, and it will be published in the end of 1972.抄録全体を表示PDF形式でダウンロード (712K) -
1973 年 52 巻 5 号 p. 365-368
発行日: 1973/05/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (540K)
- |<
- <
- 1
- >
- >|