New Vapor–Liquid Phase Equilibrium Data of CO2 in Several Heavy n-Alkanes at High Pressures,Journal of Chemical & Engineering Data

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New Vapor–Liquid Phase Equilibrium Data of CO2 in Several Heavy n-Alkanes at High Pressures
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-03-18 , DOI: 10.1021/acs.jced.0c00834
JinTao He ₁ , XueMan Xu ₁ , Xia Gui ₁

Affiliation

New phase equilibrium data of CO₂ in n-hexadecane, n-heptadecane, n-octadecane, n-nonadecane, and n-eicosane were measured at temperatures from 333.15 to 373.15 K up to 23.73 MPa by a constant-volume method. Thermodynamic properties of Gibbs free energy (Δ_solG), enthalpy change (Δ_solH), entropy change (Δ_solS), and Henry’s coefficient (H) were calculated and analyzed for elucidating the dissolution mechanism of CO₂ in alkanes. Results showed that the CO₂ solubility increased with increasing pressure but decreased with increasing temperature and carbon number. In addition, increasing carbon number also led to an increase in the minimum miscibility pressure (MMP) of alkanes with CO₂ and thus limited CO₂ solubility in alkanes.

中文翻译：

几种高压正构烷烃在高压下CO _2的新的汽液相平衡数据

CO的新相平衡数据₂在Ñ十六烷，Ñ -heptadecane，Ñ -octadecane，Ñ -nonadecane和Ñ -eicosane通过定容法在从333.15温度下测量到373.15ķ高达23.73兆帕。吉布斯自由能（Δ的热力学性质_溶胶ģ），焓变（Δ_溶胶ħ），熵变（Δ_溶胶小号），和亨利的系数（ħ）进行了计算，并阐明CO的溶解机理分析₂中烷烃。结果表明，CO ₂溶解度随压力增加而增加，但随温度和碳数增加而降低。另外，碳数的增加还导致与CO ₂的烷烃的最小混溶压力（MMP）的增加，因此限制了CO ₂在烷烃中的溶解度。

更新日期：2021-04-08

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