巻号一覧
9 巻, 11 号
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平田 光穂, 中原 伯子1966 年 9 巻 11 号 p. 879-884
発行日: 1966/11/25
公開日: 2009/01/30
ジャーナル フリーThe vapor-liquid equilibria of hydrogen-hydrocarbon systems have often been thought anomalous in their behavior because the solubility of hydrogen in hydrocarbons increases with increasing temperature. The similar behavior is observed in systems where one component has much higher volatility than the other such as nitrogen-hydrocarbon (carbon number>4) systems. The methods of predicting the equilibrium ratio are very few and it is proved also in this paper that the calculation applying the B-W-R equation is unsatisfactory at low temperatures. It is because the content of hydrogen in liquid phase and that of hydrocarbon in vapor phase are extremely small and the coefficients of B-W-R equation are not acculate enough to represent the phase behavior correctly. In such systems it is necessary to remark these small amount of components in each phase. The hydrogen content in liquid phase is proved to obey Henry's law. Henry's constant (H) is generalized by plotting H/Pc, vers T/Tc. As to the vapor phase the amount of hydrocarbon which exceeds the Poynting's effect is considered as the solubility of hydrocarbon in compressed hydrogen. This solubility defined as α depends only on the temperature and not on the pressure. α is generalized by relating αVc to T/Tc. Knowing H and α, the equilibrium ratios are obtained easily with sufficient accuracy. (Tc, Pc and Vc are the critical constants of hydrocarbons.)抄録全体を表示PDF形式でダウンロード (375K) -
平田 光穂, 須田 精二郎1966 年 9 巻 11 号 p. 885-889
発行日: 1966/11/25
公開日: 2009/01/30
ジャーナル フリーSaturated vapor pressures of n-butane and isobutane in high pressure regions were measured in detail up to Tr=0.944 for n-butane and Tr=0.916 for isobutane.
From observed temperature-pressure relations, the following three constants of Antoine equation were determined;
A=7.670088, B=-1, 534.0461, C=324.6567 (55∼130°C) for n-butane
A=7.303160, B=-1, 204.1271, C=284.9782 (20∼110°C) for isobutane.
Comparisons of literature values of many workers for n-butane show that the data of Seibert and Burrell17), Dana, Jenkins, et al.5), Sage, Webster and Lacey16), and Griswold and Brooks7) are a few per cent higher than that of more accurately determined results of Beattie, Simard and Su1), Olds, Reamer, Sage and Lacey12), and recently presented data of Connolly4) which agree very closely with our experimental results. For isobutane, the data of Griswold and Brooks7), Sage and Lacey15), and Connolly4) agree with the authors results within 0.4%, and all of these data were concluded to be thermodynamically consistent data.抄録全体を表示PDF形式でダウンロード (1298K) -
功刀 泰碩, 冨永 博夫, 安孫子 寿朗, 生天目 昭夫1966 年 9 巻 11 号 p. 890-895
発行日: 1966/11/25
公開日: 2009/01/30
ジャーナル フリーPyrolysis of propane in the presence of large amount of hydrogen was studied, by use of a flowreactor made of quartz, between 700 and 840°C at atmospheric pressure. The results were compared with those obtained in the presence of inert gases such as nitrogen or helium. The distribution of decomposition products was changed in the presence of added hydrogen. This was explained by the secondary reactions such as hydrogenolytic demethylation of propylene into methane and ethylene as well as hydrogenation of ethylene into ethane. It was also found that the hydrogen promotes the rate of propane decomposition by a factor of 2∼3 which depends on both temperature and the amount of hydrogen. The discussion in terms of the related elementary reactions showed that the cause for the above promotion could be attributed chiefly to the conversion of inactive allyl radical by hydrogen to propylene and active hydrogen atom that plays an important role in the course of chain propagation.抄録全体を表示PDF形式でダウンロード (472K)
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