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51 巻, 9 号
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古賀 久雄1972 年 51 巻 9 号 p. 691
発行日: 1972/09/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (225K) -
矢田部 照夫, 石原 義巳1972 年 51 巻 9 号 p. 692-699
発行日: 1972/09/20
公開日: 2010/06/28
ジャーナル フリーThe standard methods for the determination of nitrogen oxides in flue gases have been established as the JIS K 0104 which include naphthylethylenediamine method and phenoldisulfonic acid method.
We have investigated the questions of their methods and proposed the solutions of them as follows:
(1) Naphthylethylenediamine method for determination of nitric oxide.
(a) to take oxygen instead of air as a oxidation reagent for nitric oxide.
(b) to sample the gases after removed sulfur dioxide by passing the gases through hydrogen peroxide solution.
(c) to take 0.7 instead of 0.5 as the ratio of nitrite ion formation from nitrogen oxides.
(2) Phenoldisulfonic acid method for determination of nitrogen oxides.
(a) to take 0.3% of hydrogen peroxide solution in stead of 0.03% solution as a absorption solution.
(b) to determine the absolute pressure in the gas sampling flask before sampling gases.
(3) Naphthylethylenediamine method for determination of nitrogen dioxide.
(a) to purge out the remained gases in the absorption vessel, which contain nitric oxide, by introducing nitrogen in it.
(b) to take the saltzman reagent instead of sodium hydroxide as a absorption solution.
(c) to correct the sampled gas volume as much as the same volume of carbon dioxide absorbed into the solution.抄録全体を表示PDF形式でダウンロード (872K) -
吉村 太, 平山 豊1972 年 51 巻 9 号 p. 700-711
発行日: 1972/09/20
公開日: 2010/06/28
ジャーナル フリーResidual coal obtained by pyridine extraction from Oyubari coal (86%C) was oxidized by 1-3 N nitric acid at the temperature of 60, 80, or 100°C.
Increasing weight of oxidized coal in the initial stage of the reaction was regarded as the results of nitration and oxidation of aromatic structure of coal and formation of carbonyl group by oxidation of aliphatic structure of coal.
Carboxyl group seemed to be produced by the proceeding oxidation of aliphatic structure of coal and degradation of coal occured producing humic acid which was a mixture of various complicated nitroaromatic acids related to the structire unit of coal.
The aromatic structure of the coal was inffered to be a type of anthracene from the comparison between the nitric acid oxidation of the coal and that of some aromatic hydrocarbons.抄録全体を表示PDF形式でダウンロード (1422K) -
流動化空気中の酸素の反応率について河端 淳一, 田崎 米四郎, 三井 茂夫1972 年 51 巻 9 号 p. 712-717
発行日: 1972/09/20
公開日: 2010/06/28
ジャーナル フリーBoth the carbonization process and the activation process are necessary to make activated carbon from coal. This paper is concerned with the effects of the carbonizing condition and the distributor or fluidizing air on conversion of oxygen in carbonization process. The coal was carbonized in stirred fluid-bed (105 mm in diameter). The fluidizing gas was air.
Since it was impossible to determine the reaction rate constant, the concept of contact efficency β was introduced to analyze the experimental data.
Then it can be concluded that
1) the value β decreases as the apparent residence time of air θg becomes larger.
2) the apparent activation energy in carbonization of coal was about 9. 5 kcal/g . mol.3) the open fraction of the distributor was suitable in the range of 1 .0 to 1.7%. This results are available for the design of carbonization plant of coal by use of fluidized bed.抄録全体を表示PDF形式でダウンロード (651K) -
清水 賢資, 佐藤 正之, 佐賀井 武1972 年 51 巻 9 号 p. 718-723
発行日: 1972/09/20
公開日: 2010/06/28
ジャーナル フリーAn automatical measuring method of distributions and mean diameters of atomized droplets is developed by means of using electronic circuits and digital computer. The scheme of the method is as follows. A photograph of particles mounted on the rotating drum is scanned by a light spot. The black or white light pulses generated from scanning apparatus are converted through electronic circuits into digital signals, and are punched on a tape by means of punching machine.
The distributions and mean diameters are computed by digital computer according to the developed logical programs. The ring shaped shadows which are characteristic of the transparent liquid droplets and osculated shadows of particles were descriminated clearly by using the proposed programs, which were impossible for automatic counters hitherto. The similar device is applicable for the measurements of various powders or the analysis of many sorts of diagrams.抄録全体を表示PDF形式でダウンロード (674K) -
伊藤 献一, 山根 清隆, 深沢 正一1972 年 51 巻 9 号 p. 724-732
発行日: 1972/09/20
公開日: 2010/06/28
ジャーナル フリーExperiments have been performed to define the influence of d. c. high voltage on liquid fuel atomization by existing fuel spray systems, such as a carburettor and a pressure spray nozzle. Studies of electrostatic spray at quasistatic states were made over a wide range of applied voltages and showed that liquid fuels were atomized by electrification at high voltage, although a fuel atomizing rate was very slight.
Fuel droplets atomized by the spray systems with an electrode were intercepted on the sampling pad or liquid. The distribution of droplet size has been yeiled to investigate the effect of applied voltage. It was found that applying high voltage improves fuel atomization and decreases the mean diameter of droplets and its standard deviation. The droplet size depends on quantity of electricity charged on it and is independent of fieldpolarity.
A result of practical importance confirmed by experiment is that the shape and arrangement of electrodes should be determined so as to increase the quantity of electricity charged on the fuel liquid. The effects of high voltage were limited by a sparking voltage between nozzle and applied electrode.抄録全体を表示PDF形式でダウンロード (1118K) -
1972 年 51 巻 9 号 p. 739-745
発行日: 1972/09/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (909K)
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