巻号一覧
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59 巻, 9 号
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渋澤 芳雄1980 年 59 巻 9 号 p. 711-712
発行日: 1980/09/20
公開日: 2010/06/28
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稲葉 榮也1980 年 59 巻 9 号 p. 713-722
発行日: 1980/09/20
公開日: 2011/10/21
ジャーナル フリーWhen coal is used for boiler fuel, from a viewpoint of environmental problem especially laying emphasis on NOx removal of flue gas, there are many points of differencevand noteworthy matters as compared with heavy oil fuel.
Most important points are that dust concentration is very high and fly ash character-istics are remarkably influenced by kind of coal.
Attention to these points, the countermeasures are described in priority.抄録全体を表示PDF形式でダウンロード (1459K) -
真下 清, 赤松 郷也, 和井内 徹1980 年 59 巻 9 号 p. 723-731
発行日: 1980/09/20
公開日: 2011/02/23
ジャーナル フリーPetroleum ether soluble part (fraction γ1) and petroleum ether insolu-ble, chloroform soluble part (fraction γ2 ) of pyridine extract of Nakayama lignite were analyzed by 13C-and 1H-NMR spectra.The average molecular structure parameters of the fractions γ1 and γ2 were calculated from the results of quantitative 13C-NMR spectra obtained by the gated decoupling with the relaxation reagent, 1H-NMR spectra, elementary analysis and average molecular weight.
The average molecular structure of aromatic rings in the fraction γ1 consists of ben-zene ring and quinone ring, and that of the fraction γ2 consists of one benzene ring and aromatic rings such as naphthalene.The nonbridge aromatic ring carbons of 50-60 percent in the frac-tions γ1 and γ2 are substituted by alkyl groups.抄録全体を表示PDF形式でダウンロード (1162K) -
前河 涌典, 吉田 諒一, 石井 忠雄, 武谷 愿1980 年 59 巻 9 号 p. 732-739
発行日: 1980/09/20
公開日: 2010/06/28
ジャーナル フリーSumiyoshi coal was hydrogenated under 220-230 kg/cm2 hydrogen pressure at 400°C with red mud-sulfur catalyst and without vehicle oil.The nominal reac-tion time was changed from 4 to 155minute.The reaction product was fractionated by n-hexane and benzene into five fractions such as oil 1, oil 2, asphaltene 1, asphaltene 2 and organic benzene insolubles.The structural parameters of each fraction were calculated by NMR spectroscopy and elemental composition.In the proceeding reaction, from the change of yield of these fractions, the mean molecular weight and structural parameters, the mechanism of the hydrogenation was investigated and surmized as follows.
The chemical reaction occuring in the reaction course, it was noted that the cleavage of the linkage between the structural unit, dealkylation and the hydrogenation of aromatic ring.It was also noted that the oxygen containing structure of Sumiyoshi coal was consi-dered as relatively refractory part for hydrogenation.抄録全体を表示PDF形式でダウンロード (944K) -
Fe(II)の酸化防止とNOの吸収宮寺 達雄, 河合 操, 宮島 邦爵1980 年 59 巻 9 号 p. 740-749
発行日: 1980/09/20
公開日: 2010/06/28
ジャーナル フリーFor the aqueous solution of Fe2+-EDTA absorbs large amount of NO, it is very promising to use it for the reduction of NO in the flue gas.But when Fe2+is oxidised to Fe3+ by oxygen, the solution loses its ability to absorb NO.
An absorption flask installed pressure gauge was used to obtain the partial pressure of NO-NO absorption curve.A bubble tower was used toinvestigate the Fe2+-EDTA oxida-tion and the NO absorption.The concentrations of Fe2+were determined from the oxida-tion potentials measured by means of Pt electrode.
The amount of NO absorbed by Fe2+-EDTA increases with the pressure of NO giving the1: 1 complex of NO: Fe2+-EDTA.And it decreases as the temperature rises in the region of low NO pressure.The Fe2+concentrations and the pH values (except pH 4) give little effect on the oxidation rate of Fe2+ during the earlier parts of the reaction.But the rate increases in proportion to the O2 concentration and the temperature.Surfactants that control bubbles, such as sorbitan monolaurate, sorbitan monooleate, 2-ethylhexyl alcohol and n-octyl alcohol restrain the oxidation of Fe2+.Though the effect of those oxidation inhibitors are independent of the concentration of O2, it becomes slightly significant as the temperature rises.抄録全体を表示PDF形式でダウンロード (1359K) -
一酸化窒素の吸收能におよぼす共存ガスおよび吸收液成分濃度の影響福田 隆至, 池田 光二, 井戸川 清, 安藤 公二1980 年 59 巻 9 号 p. 750-756
発行日: 1980/09/20
公開日: 2010/06/28
ジャーナル フリーExperiments were conducted on the effects of coexisting SO2, O2 and CO2 and of liquid components on the duration of absorption efficiency of NO by the slurry liquid of Fe(II)-edta-MgSO3 system under the conditions:gas flow rate of one liter per minute, absorbing liquid of 200ml and temperature ranged from 30 to 70°C.
Duration of high absorption efficiency of NO increased with the increases in the initial concentration of Fe(II)and MgSO3, but decreased with an increase in the concentra-tion of edta.Furthermore, the duration of high absorption efficiency decreased with the increases of the concentration of NO and O2, but was not so much influenced by the con-centration of SO2and CO2.
An effective durable time of NO absorption was defined as the time θ85 when absorp-tion efficiency of NO was lowered to 85% of its initial value.Empirical equations on θ085 obtained were as follows:
The maximum mole ratio of total NO absorbed, to MgSO3 was 0.82 for O2free system and was 0.40 for O2 contained system when the content of O2in the feed gas was 3.4%.抄録全体を表示PDF形式でダウンロード (994K) -
熱処理温度の影響神下 護, 塚島 佳子, 嵯峨 三男, 宮川 亜夫, 谷原 秀太郎1980 年 59 巻 9 号 p. 757-767
発行日: 1980/09/20
公開日: 2010/06/28
ジャーナル フリーThe effects of heat treatment temperature(HTT)up to 1600°C on reactivity and some physical characteristics were studied from nine reactive-rich cokes as obtained by means of the specific gravity separation from a wide rank range of metallurgical coke coals.The results were:(1)the CO2 surface area of all physical charactristics such as densities, porosities, surface areas and the average height of the hypothetical crystallite (Lc)influences most the reactivity over the full range of HTT, and the specific initial reactivity on the CO2 surface area is inversely proportional to the CO2 surface area, (2)Lc of all cokes increases with HTT increase and its apparent activation energy of the higher rank coke is greater than that of the lower rank coke, (3)the reactivity decreases with the increase of Lc as well as HTT and the extent of HTT and Lc effect depends on the coal rank.It is possible to predict the reactivity if HTT and Lc are known, and(4)the reactivity of their cokes with the Lc value greater than 20Å has a strong correlation with the true density.Mamoru, KAMISHITA;Yoshiko, TSUKASHIMA;Mitsuo, SAGA;Tsugio, MIYAGAWA;Hidetaro, TANIHARA抄録全体を表示PDF形式でダウンロード (1432K) -
武田 詔平, 河端 淳一, 弓山 翠, 田崎 米四郎, 本間 専治, 森 滋勝1980 年 59 巻 9 号 p. 768-774
発行日: 1980/09/20
公開日: 2010/06/28
ジャーナル フリーIn the previous paper, a simulation model of the coal gasifier was developed and it was shown that the data obtained from 75 mmΦ single-stage pressurized fluidized-bed coal gasification test plant were explained sufficiently by this model.
Over the wide ranges of the operational conditions, the performance of the gasifier are examined theoretically by using this model and following results are obtained.
(1)When the steam ratio is increased keeping the char holdup constant, there exists the optimum operational condition in which both steam utilization and heating value of the produced gas reach maximum.
(2)Though the performance of the gasifier might be improved satisfactorily if the char holdup could be increased, the gasification test plant have been already operated in the neighborhood of the optimum conditions.
(3)With scaling up the gasifier, both char holdup and gas flow rate can be increased more without slugging, then char through-up per unit cross-sectional area of the gasifier can be improved fairly well.抄録全体を表示PDF形式でダウンロード (849K) -
1980 年 59 巻 9 号 p. 774
発行日: 1980年
公開日: 2011/02/23
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山畑 祐哉, 森本 清水1980 年 59 巻 9 号 p. 775-780
発行日: 1980/09/20
公開日: 2010/06/28
ジャーナル フリーSome combustion tests f or utilizing oily sludge as f uel were carried out with a 0.5m square sectioned experimental fluidized bed boiler.Almost of all combus-tibles in oily sludge are volatile matters, so a considerable amount of combustibles may leave the bed and burn out in the freeboard.Predicting the amount of combustion in the bed is very important for designing the heat transf er tube immersed in the bed.
This paper presents the effects of some factors which are the fuel feeding, the air ratio, the bed temperature and the bed height, on the in-bed combustion efficiency of oily sludge.
The experimental results drew the conclutions as follows;
(1)The in-bed combustion efficiency is directly proportional to the air ratio, the bed temperature and the bed height.
(2)But it cant be more than 85% within a conventional variation of those factors.
(3)It can be recognized that the bottom feeding system gets to higher in-bed combustion efficiency than the surface feeding.system.
(4)It is important for increasing the in-bed combustion efficiency to promote the mixing rate between volatile products and combustion air in the bed.抄録全体を表示PDF形式でダウンロード (792K)
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