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55 巻, 1 号
選択された号の論文の6件中1～6を表示しています
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吉田 雄次1976 年 55 巻 1 号 p. 1
発行日: 1976/01/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (255K) -
中山 満茂1976 年 55 巻 1 号 p. 2-11
発行日: 1976/01/20
公開日: 2010/06/28
ジャーナル フリーThis paper deals with the explanation of a synthesis of methanol from natural gas and the technological investigation of methanol combustion at power plant.
The author takes up three important factors for which methanol fuels are untilized at domestic power plants. They are;
(1) the problem of stabilised supply during long time.
(2) the problem of economical supply price.
(3) the problem of combustion characteristics; flue gas status during methanol combustion.抄録全体を表示PDF形式でダウンロード (1291K) -
山岸 一夫1976 年 55 巻 1 号 p. 12-21
発行日: 1976/01/20
公開日: 2010/06/28
ジャーナル フリーRefering surveys and experimental data up to the present day, comparison is made in the NOx emission characteristics of several fuels from the standpoints of combustion mechanism, fuel nitrogen, C/H and combustion modifica-tions. It is shown that the NOx emission level falls down proportionally as hydro-carbon fuels become lighter.
There are two routes by which NOx is formed in the combustion of hydrocarbon fuels. One is the Zeldovich mechanism (thermal NO), the other is the reaction through CH radicals as suggested by Fenimore (prompt NO). It is thermal NO that can be suppressed by the conventional combustion modification. prompt NO as well as fuel NO is difficult to suppress and its emission level is higher in proportion to the carbon number of the hydrocarbon fuels. This results in the higher emission of NOx in the exhaust gas.
To suppress prompt NO, it is very effective to reform hydrocarbon fuels into simple inorganic gases such as CO and H2 prior to the complete combustion. To materialize this method in actual combustion processes, making use of a light hydro-carbon fuel, some practical means are illustrated.抄録全体を表示PDF形式でダウンロード (1536K) -
石炭のガス化と燃焼に関連して吉田 邦夫1976 年 55 巻 1 号 p. 22-29
発行日: 1976/01/20
公開日: 2010/06/28
ジャーナル フリーA number of investigations have been made on the transport phenomena in fluidized beds at room temperature. In practical applications, however, fluidized beds are usually operated at elevated temperatures. Despite this fact, little investigations have been been reported on the temperature dependence of fluidization. In the pressent work an attempt was made to dis cuss several transport phenomena such as heat transfer and reactions in fluidized bedt at high temperatures.抄録全体を表示PDF形式でダウンロード (1206K) -
石炭, 瀝青物のバインダー効果藤嶋 一郎, 宮川 亜夫1976 年 55 巻 1 号 p. 30-37
発行日: 1976/01/20
公開日: 2010/06/28
ジャーナル フリーIn order to exmine the characteristics of bituminous coals or bitumens as binder these materials were carbonized with coke breeze or anthracite fines. The tensile strength of these cokes was measured using indirect tensile test.
A study of the results has led to the conclusion that there exists a definite correlation between the tensile strength and the binder properties. The efficiency of binder coal such as maximum tensile strength and optimum inert ratio is determined by the type of vitrinite. The aromaticity of bitumens is directly proportional to the tensile strength of coke caronized from bitumen blended inerts. But bitumens examined in this paper have the same value of optimum inert ratio.抄録全体を表示PDF形式でダウンロード (1099K) -
再生フミン酸の酸性基の性状および金属イオンとの相互作用について吉田 久良, 三木 敏晴, 有田 靜児, 中川 雅直1976 年 55 巻 1 号 p. 38-51
発行日: 1976/01/20
公開日: 2010/06/28
ジャーナル フリーTne properties of acid group in regenerated humic acid (HA I) prepared, from bituminous coal by nitric acid oxidation were studied by means of poten-tiometric titration in DMSO and pH titration in comparison with those of other humic acids. Regenerated humic acid (HA II) prepared from bituminous coal by air oxidation, regenerated humic acid (HA III) prepared frombituminous coal by alkali fusion and natural humic acid (HA IV) extracted from lignite had two inflection points in potentiometric titration curve in DMSO, while HA I and regenerated humic acid (HA V) prepared from lignite by nitric acid oxidation had one inflection point. These results indicate that the nitro group introduced in humic acid during nitric acid oxidation enhanced the acidity of phenolic hydroxyl group in humic acid and hence carboxyl group and phenolic hydroxyl group could not be titrated separately.
The relation between the acid group content of HA I and oxidation condition has been investigated. It was found that the acid group content of HA I increased with increasing in the concentration of nitric acid, reaction time and amount of nitric acid per 1 g of coal.
The inflection in pH titration curve of regenerated humic acid was sharper than that of natural humic acid. This might be due to the fact that the acidities of acid groups in regenerated humic acid are more uniform than those of natural humic acid. The pH titration of humic acid in the presence of transitional metal ions indicated the formation of humic acid-metal complexes. The order of the magnitude of pH drop of regenerated humic acids on addition of transitional metal ions was found to be Cu++> Zn++>Mn++>Co++>Ni++ and not to follow the Irving-Williams series for the stabilities of metal complexes. The amounts of acid group complexed with Cu++ in HA I and HA II were larger than those of HA IV and HA V. This result suggests that the regenerated humic acid prepared from bituminous coal is more abundant in acid group similar to salicylic and phthalic acids than other humic acids. It was found that phenolic hydroxyl group also took part in the formation of complex between regenerated humic acid and Cu++. Consequently it was suggested that a chelate was formed in the reaction of regenerated humic acid with Cu++.
A few informations about the acidity of humic acids were obtained from potentiometric titrations.抄録全体を表示PDF形式でダウンロード (1620K)
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