巻号一覧
8 巻 (1965)
- 12 号 p. 940-
- 10 号 p. 767-
- 8 号 p. 610-
- 7 号 p. e1-
- 6 号 p. 428-
- 4 号 p. 249-
- 2 号 p. 97-
- 1 号 p. 29-
8 巻, 12 号
選択された号の論文の3件中1～3を表示しています
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触媒酸性度と芳香族化選択性について吉田 浩, 冨田 裕, 冨士原 広, 鈴村 基1965 年 8 巻 12 号 p. 940-945
発行日: 1965/12/25
公開日: 2009/01/30
ジャーナル フリーA correlation between the surface acidity and the aromatization selectivity of the chromia-alumina and molybdena-alumina catalysts has been investigated.
The acid sites existing on the surface not only on the alumina, but also on the chromia (or on the molybdena) work as a catalyzer to induce the side reactions such as carbonaceous deposition, cracking and so on, which tend to lower the selectivity of the aromatization of n-heptane.
The addition of alkali metal ions or alkaline earth metal ions to these catalysts neutralizes the acid sites, thereby suppressing the side reactions and hence increasing the dehydrocyclization selectivity.
Alkali metal ions were more effective promoters per ion than alkaline earth metal ions, and, in general, larger metal ions were observed to have a greater promotional effect than smaller ions among the same group on the aromatization selectivity.
The aromatization selectivity of the catalyst increased as the surface acidity decreased.抄録全体を表示PDF形式でダウンロード (441K) -
燃料のノック性に及ぼす燃料分離の影響森 利淳, 前田 耕, 高取 武夫, 山崎 毅六1965 年 8 巻 12 号 p. 946-950
発行日: 1965/12/25
公開日: 2009/01/30
ジャーナル フリーThe effect of fuel segregation on knocking characteristics of fuels was studied by making use of a bled manifold installed on the CFR engine. The bled manifold was similar to the model developed by Ethyl Corp. except for the capacity of its inner chamber which was about twice as much as the displacement of the engine.
By varying the jacket temperature of the bled manifold and the amount of fuel fed to the carburettor, various degrees of fuel segregation were obtained. The phenomena was found to be a kind of equilibrium air distillation.
The effect of mixture strength, varied according to the degree of fuel segregation, on knocking tendencies of catalytically reformed naphtha, both clear and leaded, was measured by means of incipient knock limited compression ratio.
The distributions of tetraethyl lead and tetramethyl lead on lighter fraction of fuel fed to the combustion chamber and on heavier fraction drained out from the bled manifold were checked by lead analysis. The calculated amount of lead distributed on the light and heavy fraction by the equation of flash distillation agreed well with the data obtained by the lead analysis.抄録全体を表示PDF形式でダウンロード (356K) -
神谷 佳男, 関根 紀之, 山川 洋一郎1965 年 8 巻 12 号 p. 951-956
発行日: 1965/12/25
公開日: 2009/01/30
ジャーナル フリーThe gas phase oxidation of propylene with small amount of oxygen under pressure was kinetically studied at temperatures from 320 to 350°C and its mechanism was discussed. The induction period is first order with nespect to the exposed surface as predicted by the theory which assumes that the termination reaction takes place only on the surface at early stage of oxidation. The rate of oxidation is first order with nespect to oxygen concentration and -0.75 order with nespect to the exposed surface suggesting that some termination neaction in the gas phase one also occuring to minor extent. The increase in the reaction pressure remarkably increases the induction period but not the rate of oxidation. Carbon monoxide forming reactions start a little later than oxygen absorption but its rate is almost as same as that of oxygen absorption, showing that carbon monoxide is produced mainly as the secondary product of oxidation.
The feature of the oxidation of propylene under pressure, that is, the higher yields of propylene oxide and aldehydes, as well as the effect of various reaction conditions can be explained by the following reactions, Initiation C3H6+O2→C3H5•+HO2•Propagation C3H5•+O2→C3H5O2•C3H5O•+O2→•CH2CHO+CO+H2OC3H5O2•→•CH2CHO+CH2O•CH2CHO+C3H6→CH3CHO+C3H5•Termination radical wall→non-radical抄録全体を表示PDF形式でダウンロード (500K)
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