巻号一覧
後続誌
53 巻, 3 号
選択された号の論文の7件中1～7を表示しています
- |<
- <
- 1
- >
- >|
-
安田 博1974 年 53 巻 3 号 p. 153-154
発行日: 1974/03/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (278K) -
大内 公耳1974 年 53 巻 3 号 p. 155-164
発行日: 1974/03/20
公開日: 2010/06/28
ジャーナル フリーCoal and Carbon researches in Canada and England were reviewed on the background of their energy problem.抄録全体を表示PDF形式でダウンロード (1302K) -
エチレン分解残油の炭化山本 賢則, 西村 幸雄, 竹下 健次郎, 高橋 良平1974 年 53 巻 3 号 p. 165-170
発行日: 1974/03/20
公開日: 2011/10/21
ジャーナル フリーThe present investigation was undertaken to know the effect of chemical structures of pitches on the formation and the growth of spherical bodies observed in the early stage of carbonization of pitches. Naphtha tar pitch of which chemical structure differs from that of naphtha tar pitch used in a previous paper (the former and the latter shall be hereafter called as naphtha tar pitch-2 and naphtha tar pitch-1, respectively) was fractionated by n-hexane, acetone, and benzene into three fractions of No.1, No.2, and No.3. Each fraction was carbonized to examine its spherical bodies by polarized-light microscope.
The structural parameters for each fraction were estimated from elemental analysis, molecular weight and hydrogen distribution determined by NMR spectra. The aromaticity and the degree of substitution of the aromatic system of each fraction were found ranging from 0.76 to 0.79 and from 0.22 to 0.25, respectively. Although the formation and the growth of spherical bodies in fractions of naphtha tar pitch-2 were easy in a similar order of No.3 to No.1 to those in naphtha tar pitch-1 and coal tar pitch as described in a previous paper, they were easy compared with the same fractions in naphtha tar pitch-1 and coal tar pitch. Furthermore, the interlayer spacing, the size of crystallite and the coefficient of thermal expansion were observed in order to compare the characteristics of cokes obtained from each fraction.抄録全体を表示PDF形式でダウンロード (985K) -
福田 憲二, 井口 憲二, 山田 泰弘, 本田 英昌1974 年 53 巻 3 号 p. 171-179
発行日: 1974/03/20
公開日: 2011/02/23
ジャーナル フリーIn order to investigate ring structure of polycondensed aromatic hydrocarbons in binder pitches, solvent extracts of the pitches were analyzed by using a square wave polarography. Pitches used were five kinds, that is, straight coal-tar pitch, reformed coal-tar pitches and naphtha-tar pitch. Their pitches were fractionated by benzene and N, N-dimethylformamide (N, N-DMF). The reduction wave of the fractions (bezene soluble matter, and N, N-DMF soluble but benzene insoluble matter) were gained in N, N-DMF solution at the potential between 0 V and -2.35V vs Hg pool. Qualitative identification of reduction wave was carried out refering to the reduction potential of standard aromatic hydrocarbons.
Results obtained were as follows,
1) All of polarograms for the benzene soluble matter showed the peak pattern having several reduction waves. Components in the straight and the reformed coal-tarpitches had aromatic ring structures such as shown in Table 3. But the reduction wave for the ring structure of anthracene, which may be included in coal-tra pitches, could not be detected. Naphtha-tar pitch consisted of aromatic ring structure such as tetracene, fluoranthene, pyrene and acenaphthene. The content of these components, however, was smaller than those in coal-tar pitches.
2) For the N, N-DMF soluble but benzene insoluble matter, the polarograms showed the pattern having two reduction waves at about 0.5V and about-1.5V, and a broad line from about-0.5V to-1.5V. For this fraction, therefor, it is consi-dered that the identification of aromatic ring structure by using a square wave polaro-graphy is rather difficult.抄録全体を表示PDF形式でダウンロード (1007K) -
永田 勝也, 山崎 正和, 山崎 久美人1974 年 53 巻 3 号 p. 180-188
発行日: 1974/03/20
公開日: 2010/06/28
ジャーナル フリーThis study was carried out to evaluate the effect of fuel-air mixing in the combustion chamber, using the small scale propane firing combustor being similar to the actual pre-combustion chamber type furnace.
Mixing pattern in the combustion chamber was changed mainly by the variation of the velocity of fuel jet according to adjusting the width of nozzle slit of burner.
The following conclusions can bereached.
1) NOx, formation is greatly influenced by fuel-air mixing patterns in the combustion chamber.
At certain mixing condition NOx formation reaches to the maximum level and getting better of worse of mixing condition causes to NOx reduction. In the bad mixing condition, heat release from the combustion zone increases and combustion temperature decreases, resulting NOx reduction. Meanwhile, in the good, decreasing of residence time and O2 concentration reduction in the high temperature region due to short flame zone causes low NOx level.
2) The momentum ratio of fuel jet and air stream is considered to be the identifying factor of mixing pattern in the combustion chamber, and can be introduced to determine the qualitative relation between NOx formation and mixing pattern.
3) Maximum NOx formation level appeared at certain volume ratio of fuel and air in the actual combustion zone, and this fuel-air ratio is considered to be the important factor to dominate the over all NOx formation level.抄録全体を表示PDF形式でダウンロード (1229K) -
森田 義郎, 金原 晃, 星沢 欣二, 金子 寿光, 井筒 和一郎1974 年 53 巻 3 号 p. 189-207
発行日: 1974/03/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (2676K) -
1974 年 53 巻 3 号 p. 212-217
発行日: 1974/03/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (820K)
- |<
- <
- 1
- >
- >|