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頁籤選單縮合
題 名 | Correlation of the Critical Temperatures of Hydrocarbons from Their Parachors=以Parachor共聯烴類的臨界溫度 |
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作 者 | 吳瀧川; 邱茂信; | 書刊名 | 明志工專學報 |
卷 期 | 22 1990.05[民79.05] |
頁 次 | 頁71-75 |
分類號 | 461.62 |
關鍵詞 | 共聯烴類; 溫度; 臨界; |
語 文 | 英文(English) |
中文摘要 | 本文提出一種簡單經驗模式Tс=A+B[P],以烴類Parachor共聯其臨界溫度。針對烷烴、烯烴、環烷烴及芳香烴共85個數據的試驗,顯示本文方法的平均誤差為1.292%。文獻中所推荐的Nokay方法及Riazi-Daubert方法,它們的推測平均誤差為0.633%及0.937%。雖然Nokay及Riazi-Daubert方法的總平均誤差較低,但此二法皆須藉助2個物質性質(Tь及S)以計算Tс。本文所提出之方法僅須利用Parachor。若採用一種雙曲線共聯式Tс=a+b[P]/1+c[P],可進一步改善本文方法的推測能力,並使其準確度接近最佳的Nokay方法。本文方法如同Nokay及Riazi-Daubert方法,皆可延伸處理Undefined流體。綜之,本文方法不失為推測臨界溫度的一種簡單且可靠的選擇途徑。 |
英文摘要 | An empirical model of Tс=A+B ln [P] has been proposed to correlate critical temperatures of pure hydrocarbons with their parachors. When tested against 85 critical temperature data of hydrocarbons encompassing alkanes, alkenes, cycloalkanes and aromatics indicate that our method gives an average absolute error of 1.292% compared to 0.633% and 0.937% respectively for the methods of Nokay and Riazi-Daubert previously recommended. Although the latter two methods produce smaller overall average deviations, they call for a knowledge of two properties (Tb and S) in order to computer Tс, whereas our method employs only the parachor for each substance. A hyperbolic form of correlation Tс=a+b[P]/1+c[P] can further improve the predictability of our method for the cases of cycloalkanes and aromatics with accuracy almost tantamount to the best method of Nokay. These comparisons show that the present approach based on the parachor is a good alternative for the rapid estimation of critical temperatures with a reasonable order of accuracy. |
本系統中英文摘要資訊取自各篇刊載內容。