巻号一覧
16 巻, 1 号
選択された号の論文の7件中1～7を表示しています
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里 一男, 西村 幸雄, 竹下 健次郎, 坂井 渡1973 年 16 巻 1 号 p. 30-35
発行日: 1973/01/01
公開日: 2009/01/30
ジャーナル フリーThermal decomposition of propane has been studied in an argon-hydrogen microwave plasma jet at 200-500 watts and 1atm. Propane was fed perpendicular to a plasma jet axis. The main products were acetylene, carbon, ethylene, methane and hydrogen. Besides the foregoing products, a small amount of propylene was also formed. At conditions of argon flow rate at 19.1±0.1l/min, hydrogen flow rate at 0.79l/min and propane flow rate at 0.34±0.02l/min, as the power increased from 250 watts to 500 watts, the propane conversion increased linearly from 15.9% to 43.4%. Propane conversion decreased with an increase of the operating gas flow rate or propane flow rate. As argon mole ratio increased in the operating gas, the propane conversion increased, but the products selectivity scarcely varied. Furthermore an investigation was undertaken to study the temperature distribution and the local products distribution in plasma jet using a probe.抄録全体を表示PDF形式でダウンロード (413K) -
梶川 正雄, 川口 勝1973 年 16 巻 1 号 p. 36-43
発行日: 1973/01/01
公開日: 2009/01/30
ジャーナル フリーAfter the first report was published, the authors have examined the relation between color stability and concentration of nitrogen compounds, the analysis of the matter adsorbed on Amberlyst-15, and the reaction mechanism of non-basic nitrogen compounds by bringing the behaviors of nitrogen compounds into a focus.
In consequence, it has been found out that nitrogen compounds, and above all non-basic nitrogen compounds are one of the causes for color instability of the kerosene and there is a relation between the nitrogen compounds and color stability.
The authors have also found out that, as for the color deterioration caused by non-basic nitrogen compounds, its autoxidation reaction with oxygen takes place, being promoted by light. For instance, 2, 5-dimethylpyrroles polymerize with each other at the positions of 3 and 4 of their pyrrolic rings and grow into the sediments by taking into oxygen.
There is a fair prospect that the technique for removing nitrogen compounds can be applied to highly sensitive method or rapid one for determining total nitrogen content so far as it is adopted as a means of concentrating the compounds.抄録全体を表示PDF形式でダウンロード (1147K) -
瀬川 幸一, 石井 直治郎1973 年 16 巻 1 号 p. 44-50
発行日: 1973/01/01
公開日: 2009/01/30
ジャーナル フリーAs a basic research for the study of the dehydrogenation of paraffins, the catalytic dehydrogenation of isopentane has been studied on Al2O3-Cr2O3 catalyst. Catalysts were prepared by impregnation of CrO3 on Al2O3, and were reduced with hydrogen at 550°C. Nitrogen was used as a diluent. Reaction conditions were as follows; Pi=0.08-0.13atm, t=460-540°C, W/F=11.4-56.7 hr•g-cat/mol-feed. Under these conditions, isoamylenes (3M1B, 2M1B, 2M2B) and isoprene were formed as dehydrogenation products, and dehydroisomerization (1-P+2-P) and cracking (C1-C4) took place to a small extent as the side reactions. The composition of isoamylenes did not depend on the type of catalyst, Pi and W/F, but showed an isomerization equilibrium. As the contents of Cr2O3 increased, the dehydrogenation activity increased, and lowered with the addition of hydrogen, isoprene or pyridine in the reaction system. The initial activity of the oxidized catalyst was higher than that of the reduced catalyst. The effect of addition of alkali metal oxide or alkaline earth metal oxide to Al2O3-Cr2O3 catalyst was also investigated. The addition of such a metal oxide reduced the acidity (pKa_??_+3.3). It was suggested that the yield of isoprene correlates with the ionic radius of the added metal oxide. The order of the reactivity of isopentane, 2M1B and 2M2B as a feedstock under the same conditions were as follows; 2M1B>2M2B>Isopentane.抄録全体を表示PDF形式でダウンロード (532K) -
中村 宗和1973 年 16 巻 1 号 p. 51-58
発行日: 1973/01/01
公開日: 2009/01/30
ジャーナル フリーA capillary gas-liquid chromatographic method has been tested to determine the detailed hydrocarbon composition of full-range catalytically cracked gasoline. The analyses were carried out by a 90m squalane capillary column in less than 4 hours. Approximately 280 chromatographic peaks were observed and 200 of them (amounting to 94wt% of the sample) have been specifically identified. The column temperature and column inlet pressure are both programmed to obtain a better resolution of the close-boiling hydrocarbons and accuracy of the peak area measurements. The carbon number distribution and PONA analyses were discussed and compared isomer distribution with thermodynamic equilibrium data.抄録全体を表示PDF形式でダウンロード (572K) -
メチルシクロペンタン改質反応の反応経路の検討長田 武雄1973 年 16 巻 1 号 p. 59-64
発行日: 1973/01/01
公開日: 2009/01/30
ジャーナル フリーReforming reaction of Methylcyclopentane (MCP) over the Pt/Al2O3/Cl type catalyst was investigated under the conditions normally encountered in industrial plants, such as reaction temperature; 450-520°C, total pressure; 10-44.5atm, Liquid Hourly Space Velocity; 5.99-23.23vol/vol•hr and ratio of H2/MCP; 5-15mol/mol.
The following conclusions were obtained.
(1) The overall initial reaction rate [v0(T)] increases remarkably with a rise of reaction temperatures. v0(T), which increases with an increase in total pressure, shows the maximum value at the pressure of 20-30atm, and then decreases with an increase in total pressure.
(2) Methylcyclopentene (MCP=) is a stable intermediate product, which is detected in the final products by a gaschromatographic analysis.
Cyclohexene (CH=) formation is not expected, because CH= is not detected by a gaschromatographic analysis and an equilibrium between MCP and CH= is much in favor of MCP under the avove reaction conditions. So, it is hardly considered that CH= is an intermediate product.
(3) The reaction paths of MCP-reforming are estimated as follows;
Path I (Dehydro-Ring isomerization-Aromatization)
Path II (Ring opening)抄録全体を表示PDF形式でダウンロード (1149K) -
1973 年 16 巻 1 号 p. 88
発行日: 1973年
公開日: 2009/01/30
ジャーナル フリーPDF形式でダウンロード (43K) -
1973 年 16 巻 1 号 p. e1
発行日: 1973年
公開日: 2009/01/30
ジャーナル フリーPDF形式でダウンロード (36K)
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