Abstract:

In order to meet the requirement for basic data of coal direct liquefaction in hydrogen-rich gas, the data of the high-pressure solubility of methane in the mixture of atmospheric No.3 diesel oil and tetrahydrofuran at temperature from 273.45 K to 293.75 K and pressure from 2.09 MPa to 7.97 MPa were collected with a self-established apparatus that measured the solubility in the cyclic way.The average structural parameters and characteristic parameters of diesel oil were calculated with the n-d-M-LP method and Constantinou-Gani method.The regression analysis of binary interactive-parameters of methane-diesel-tetrahydrofuran with the Peng-Robinson cubic equation of state combined by two mixing rules was used to estimate the solubility data under the same condition which well agreed with experimental data.

Key words: 甲烷, 溶解度, 汽液平衡, n-d-M-LP法, C-G法

摘要：

为了满足富氢气氛下煤直接液化基础数据的需要，选择常三柴油、四氢呋喃为混合溶剂，利用自建的循环法气体高压溶解度测定装置，测定了甲烷在柴油-四氢呋喃中的高压溶解度数据（273.45～293.75 K，2.09～7.97 MPa）。利用n-d-M-LP法以及C-G法计算了柴油的平均结构和特性参数，利用Peng-Robinson状态方程结合两种混合规则回归实验数据，得到CH^₄-柴油-四氢呋喃的交互参数，并估算了同条件下的溶解度数据，结果表明估算值与实验值吻合较好。

关键词: 甲烷, 溶解度, 汽液平衡, n-d-M-LP法, C-G法