• 作者： Lin, Hung-Jye; Hwang, Jia-Shang
• 中文摘要： 本文提出一適用於極性物質與非極性物質的狀態方程式, 使係數 a, b, c成為溫度的函數,則可以精確計算純物質之蒸氣壓與飽和液體密度, 本文列出54種化合物之溫度係數, 利用偏心係數可使 a, b, c的計算公式通式化。本文探討高壓狀態之熱含量計算問題, 利用一般的混合法則, 本文所提出的狀態方程式可用於氣液平衡之計算, 對於18組碳氫化合物雙成分系統與二氧化碳--乙烯系統的氣液平衡均可得極佳的結果。本文亦探討交互作用係數在高溫時假設與溫度無關之可行性。
• 英文摘要： A modified cubic equation of state for polar and nonpolar substances is proposed. Vapor pressures and saturated liquid densities of pure compounds can be closely reproduced by assuming the parameters a, b and c in a cubic equation of state to be tempreature-dependent. The temperature coefficients of fifty-four compounds are listed. With the introduction of the acentric factor as a fourth parameter, a generalized correlation for the modified parameter can be derived. The heat capacity predictions at elevated pressures are discussed. With the application of the original generalized mixing rules, the proposed equation of state can be extended satisfactorily to multicomponent VLE calculations. Good results are obtained for VLE calculations of eighteen hydrocarbon binary systems and CO/sub 2/-ethylene system. The feasibility of assuming a constant interaction parameter at elevated temperatures is demonstrated.
• 中文關鍵字： 平衡常數; 氣相-液相平衡; 臨界壓縮因子; 混合規則; 相互作用參數
• 英文關鍵字： Vapor Liquid Equilibrium; Equilibrium Constant; Acentric Factor; Critical Compressibility Factor; Mixing Rule; Interaction Parameter