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63 巻, 2 号
選択された号の論文の9件中1～9を表示しています
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里見 弘次1984 年 63 巻 2 号 p. 89
発行日: 1984/01/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (194K) -
宗像 英二1984 年 63 巻 2 号 p. 90-99
発行日: 1984/01/20
公開日: 2010/06/28
ジャーナル フリーNo one in the world knows, except we factory personnel, about theinternal heating reactor of Agochi Factory in North Korea which had been producingcoal liquefied oil in industrial scale, about a half century ago. The auther tried toexplain about Agochi technique, but could not touch in detail, because people seemedonly to learn general with satisfication. Therefore, in this paper, auther try to reportthat concerning liquefaction reaction, the internal heating system (heterogenous heating) exhibits twice higher space time yield than the external heating system (homogenousheating). And in the case of internal heating system, it is possible to keep away fromtroublesome coal slurry heater, and further, very high heat economy in reactor operationand cheap construction cost in reactor structure are expected. The auther emfasizesthat coal liquefaction in future should be developed in the principle of internal heatingreactor system.抄録全体を表示PDF形式でダウンロード (1711K) -
海保 守1984 年 63 巻 2 号 p. 101-106
発行日: 1984/01/20
公開日: 2011/10/21
ジャーナル フリーHeat of wetting in methanol has been measured for ten kinds of Japanese coals and four foreign coals.
No relationship was found between the heat of wetting and the specific surface area determined by gas adsorption method using carbon dioxide. The value, .dividing the heat of wetting by the specific surface area, increased linearly with oxygen con-tent of the coal.
The heat of wetting per one mole of methanol absorbed in coal was calculated by assuming that the amount of methanol absorbed in coal was equal to the difference of the specific volume of coal measured in methanol and n-hexane. It was found that the heat of wetting per mole of methanol increased linearly with mole numbers of oxy-gen or hydroxyl group in coal.抄録全体を表示PDF形式でダウンロード (762K) -
鳥飼 直親, 目黒 竹司, 堀井 満正, 若狭 勉1984 年 63 巻 2 号 p. 107-114
発行日: 1984/01/20
公開日: 2011/02/23
ジャーナル フリーThe oxidation of iron impregnated carbons (zero to 4% Fe) in CO or CO2-N2 mixtures was measured at temperatures 700°C to 900°C . Two types of carbon were used in this experiment. One of them (D. P. C.) was prepared from pulverized Delayed Pitch Cokes, molded with binder and baked at about 1, 300°C and another one (A. G.) was a nuclear grade artificial graphite. The carbon samples, formed in the size of 25×35×mm, were submerged into the Fe (NO3) 3 solution in vacuo and desired amount of Fe was impregnated.
In the pure CO2 oxidation, it was clearly observed that the Fe catalyst is much more effective on A. G. than D. P. C. In the reaction of CO2-N2 mixtures which was carried out on A. G., the extent of burn-offs depended upon Pco2. The burn-offs increased with decreasing of Pco2 in the lower temperatures. It should be emphasized that the burn-off of 80% was obtained on A. G. impregnated with only one percent of Fe in the reaction of Pco2=0.15 at 700°C
In some cases, the abrupt decreasing of the rates were observed after the reaction proceeded to some extents as if the catalysts were deactivated in the reaction of CO2-N2 mixtures. Discussion is given on these phenomena and results.抄録全体を表示PDF形式でダウンロード (889K) -
辻 利明, 上村 信夫, 阿部 利雄, 西田 清二1984 年 63 巻 2 号 p. 115-121
発行日: 1984/01/20
公開日: 2010/06/28
ジャーナル フリーIn order to investigate the relationship between CO2 reactivity and structure of cokes at elevated temperatures, three kinds of coke were cut down to the 20mm-cube, 24.8mmφ-ball and 10mm-cube, respectively and the differences of CO2 reactivity at 1, 300 and 1, 500°C were measured.
The obtained results are summarized as follows,
(1) The reactivity of cokes at 1, 500°C decreased with decrease of the external surface area and this phenomena was a good agreement with the general theory of a gas film diffusion controlling step.
(2) The result at 1, 300°C indicated the remarkable difference of the reactivity was depended on properties of coke rather than on the change of the external surface area.
(3) The reactivity at 1, 500°C decreased with increase in the porosity of the coke, con-trary to the tendency at 950°C
Namely, the porosity means the ratio of carbon on the external surface of cokes. Therefore, it is concluded that the CO2 reactivity of cokes at 1, 500°C is related remar-kably to the ratio of carbon on the external surface because of a gas film diffusion control.抄録全体を表示PDF形式でダウンロード (725K) -
レットダウンバルブのエロージョン現象に対する一考察小郷 良明, 須原 豊1984 年 63 巻 2 号 p. 122-127
発行日: 1984/01/20
公開日: 2010/06/28
ジャーナル フリーThe mechanical shearings of SRC and coal were investigated at room temperature up to 5 GPa load pressure by using a self made high pressure apparatus capable of generating simultaneous shear deformation. All shearing curves reached an equilibrium value after rapid increase of shear stress and these values and the subsequent variations were depended upon the coal type. The shear strength of coal was estimated from the corresponding shearing curve and the mechanical behavior of coal at high pressure was analysed from a viewpoint of mineral-matter content. Effect of pressure on the macroscopic shear strength of coal was not so large different from that of rigid polyvinyl chloride resin. The erosion of letdown-valve is discussed.抄録全体を表示PDF形式でダウンロード (636K) -
澤田 三郎, 高橋 知二, 斉藤 海三郎, 松村 哲夫1984 年 63 巻 2 号 p. 128-134
発行日: 1984/01/20
公開日: 2010/06/28
ジャーナル フリーRecently the characterization method, thin-layer chromatography with a flame ionization detector (TLC-FID), has been applied to coal-derived liquids, but heavier fractions such as asphaltenes and/or preasphalthenes have been excluded. The heavier fractions are important indicators of the degree of coal-hydroliquefaction.
A new analytical method has been developed to separate the pyridine solubles including the heavier fractions into four components over a silica gel rod. The method uses the following solvent system in this order: benzene/methanol (60/40), benzene/me-thanol (95/5), n-hexane/benzene (50/50). The coefficient of variation yields to within 4.7%.
As a result, the TLC-FID was found to be both a useful method for simply and rapidly characterizing heavy organic coal products and applicable for estimating the sequential solvent extracts.抄録全体を表示PDF形式でダウンロード (840K) -
竹村 安弘, 橋本 丈児, 大内 公耳1984 年 63 巻 2 号 p. 135-140
発行日: 1984/01/20
公開日: 2010/06/28
ジャーナル フリーThis work is to study the reactions of coals with water. All the reactions of Yokote peat (C=60.3%) and Wakimoto Seam II lignite (C=62.2%) with water were carried out in a batch-autoclave at 300-400°C under hydrogen starvation conditions. Two kinds of catalysts, alumina-supported MoO3 and WO3, were used. WO3 catalyst facilitated the reactions of peat and of lignite with water to give much larger amount of benzene-soluble matter and gaseous product than that of non-catalytic reaction, whereas MoO3 catalyst was practically inert toward the reactions of these coals.
Otherwise, the reactions of benzyl ether with water were performed on both the catalysts, respectively, to elucidate the above mentioned experimental results of coals. On MoO3 catalyst were formed dibenzyl and equimolar toluene and benzaldehyde. This suggests that MoO3 catalyst promotes mainly the following reactions:
Ph-CH2-O-CH2-Ph→Ph-CH3+Ph-CHO (I)
Ph-CH2-O-CH2-Ph→Ph-CH2+Ph-CH2-O (II)
Ph-CH2-O+Ph-CH2-O-CH2-Ph→Ph-CH2-OH+Ph-CH-O-CH2-Ph (III)
Ph-CH-O-CH2-Ph→Ph-CHO+Ph-CH2 (IV)
2Ph-CH2→Ph-CH2-CH2-Ph (V)
On the other hand, product relatively abundant in benzyl alcohol and benzaldehyde was given on WO3 catalyst, indicating that hydrolysis of benzyl ether and subsequent dehydrogenation of benzvl alcohol take nlare mainly:
Ph-CH2-O-CH2-Ph+H2O→2Ph-CH2-OH (VI)
Ph-CH2-OH→Ph-CHO+H2 (VII)
Summarizing the above experimental results and considerations, it may be clai-med that WO3 catalyst facilitates hydrolysis of ether bond in structures of lignite and peat forming molecules such as alcohol or aldehyde type ones as shown by reactions (VI) and (VI). This, overcoming the competing condensation reactions, leads to produc-tion of benzene-soluble matter. Meanwhile, MoO3 catalyst, irrespective of the presen-ce of water, splits some chemical bonds such as C-C and C-O to give a large amount of radical as shown by reaction (II). This is due to hydrogen starvation and results in the polymerization reactions, such as reaction (V), instead of depolymerization.抄録全体を表示PDF形式でダウンロード (710K) -
稲葉 敦, 三木 啓司, 佐藤 芳樹, 伊牟田 和敏, 山川 敏雄1984 年 63 巻 2 号 p. 141-147
発行日: 1984/01/20
公開日: 2010/06/28
ジャーナル フリーHydrotreatment of two samples of coal liquid was studied experimentaly. The first sample was prepared in a continuous reactor at 450°C by liquefaction of Miike coal and the other one was a washing oil solution containing 25% SRC produced from SRC-I process.
Experiments of hydrotreatment were carried out on Co-Mo/Al2O3 catalyst at 400-450°C under 15. 3 MPa of H2 using a fixed bed reactor with 100N1/13. of Hz flow and LHSV of 1. Oh-1.
Experimental results showed that conversions of SRC included in these two coal liquid were not different and amounted to 70wt% at 450°C. Over 400°C, average mole-cular weight and H/C ratio of remaining SRC of these coal liquids decreased with in-creasing temperature. But, the lighter fractions of hydrotreated oil, boiling points of which were less than 250°C, were getting so large in amount that H/C ratio of hydrotreated oil containing SRC increased with higher temperature. Ultimate analysis of hydrotreated oil showed that nitrogen content decreased with temperature, while sulfur content did not decreased over 400°C抄録全体を表示PDF形式でダウンロード (790K)
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