Journal of the Fuel Society of Japan

[title in Japanese]

[in Japanese]

1972 Volume 51 Issue 3 Pages 135
Published: March 20, 1972
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.3775/jie.51.135

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Autoxidation in Coal Chemistry and Petroleum Chemistry

Yoshio Kamiya

1972 Volume 51 Issue 3 Pages 136-147
Published: March 20, 1972
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.3775/jie.51.136

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The autoxidation reaction of coal was reviewed from the petrochemical point of view. The first step in the oxidation of coal in alkaline aqueous solution is the formation of water insoluble acids by the dissolution of coal and the second step the base-catalyzed autoxidation of water insoluble acids to water soluble aromatic acids such as benzene polycarboxylic acids. At the optimum conditions the yield of water soluble aromatic acids was about 60% from a Japanese bituminous coal, when sodium carbonate was used bleeding carbon dioxide from the reactor. It was confirmed that the side chains of benzene ring, naphthalene nucleus and phenolic compounds were easily decomposed to form benzene carboxylic acids, but anthracene, anthraquinone and diphenyl compounds relatively stable against oxidative decomposition. Properties and utilization of produced aromatic acids along with the application of coal oxidation process were discussed.

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Gasification of Heavy Oil

Yoshiro Morita

1972 Volume 51 Issue 3 Pages 148-154
Published: March 20, 1972
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.3775/jie.51.148

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On account of difficulties of the sufficient desulfurization of fuel oil, gasification of heavy oil and desulfulization of the gas become important problem in Japan. However, effectual gasification of heavy oil, especially asphaltic bottom, is quite difficult.
In this paper, three fundamental processes of gasification of heavy oil thermal cracking, partial oxidation at high temperature, hydrocracking-and some combination of these processes have been elucidated. Futhermore, one assumptive plan on the future processes has also been proposed.

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On-line Mass Spectrometry of Fuel Oil

Shozo Oshima

1972 Volume 51 Issue 3 Pages 155-161
Published: March 20, 1972
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.3775/jie.51.155

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An outline of online data processing system of mass spectrometer and its application to the analysis of fuel oil are reviewed.
On the system the hardware and software are described, and on the analysis of fuel oil it is explained the type analysis which apply to saturate hydrocarbons, aromatic hydrocarbons, sulfur compounds, nitrogen compounds and organic acids in gasoline, kerosene, gas oil and crude oil. Low energy ionization mathod and the analysis of aromatic fractions of petroleum distillates used high resoltution mass spectrometer are also explained.

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A Study on the Coking Property of Asphalts and Pitches (I)

Study on the chemical structure of the carbon disulfide soluble portion of asphalts and pitches by IR and NMR spectroscopyby

Tsugio Miyagawa, Yoshinobu Takegami

1972 Volume 51 Issue 3 Pages 162-171
Published: March 20, 1972
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.3775/jie.51.162

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As for a study on the coking property of asphalts and pitches, the characteristics of their bitumens were in the first place pursued. The straight asphalt was seperated into four components. IR- and NMR- spectra of the carbon disulfide soluble portion of asphalts, fractions and pitches were compared. Then, using the hydrogen distribution data from the NMR spectra, elemtary analysis and molecular weight, the structural parameters were estimated.
The aromaticity of the asphalts was low and not polycondensed. The degree of aromatic substitution of the asphalts was high value comparing with the pitches. From the data by thermogravimetric method, the coking residue was mainly obtained from poly-condensed aromatic compounds.

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A Study on the Coking Property of Asphalts and Pitches (II)

Study on the plasticity of coals mixed with asphalts and pitchesby

Tsugio Miyagawa, Shosuke Takahashi, Shungi Ito

1972 Volume 51 Issue 3 Pages 172-179
Published: March 20, 1972
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.3775/jie.51.172

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As for a study on the coking property of asphalst and pitches, the plasticity of coals mixed with those additives was pursued. Three kinds of the blended coals were prepared as base coals for mixing with additives. When these base coals were carbonized without the additives, they were lacking in coke strength compared with the blast furnace cokes. The plasticity was measured with a Gieseler plastometer and with a Audibert-Arnu dilatometer.
Addition of asphalts or pitches to the base coals gives the following results.
1) Initial softening temperature and initial dilating temperature shifted to lower range, but solidification temperature was almost unchanged.
2) Maximum fluidity was increased with amount of additives.
3) The limits of softening temperature and dilating temperature were broadening to lower range.
4) Increase of maximum fluidity was not always connected with a big increase of dilatation.
5) Fluidity and dilatation characteristics closely depended on those of base coals themselves, so, effects of additives on the plasticity were fairly limited by quality of base coals.

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[title in Japanese]

1972 Volume 51 Issue 3 Pages 186-190
Published: March 20, 1972
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.3775/jie.51.186

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