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The solubility of CO2 in (hexane + cyclohexane) and (cyclopentane + ethylbenzene) and (toluene + undecane) systems at high pressures
The Journal of Chemical Thermodynamics ( IF 2.6 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.jct.2020.106324
Yahui Gao , Chuanyan Li , Shuqian Xia , Peisheng Ma

Abstract In this work, the solubility of CO2 in three binary hydrocarbon mixtures of different molecular structures, hexane + cyclohexane, cyclopentane + ethylbenzene and toluene + undecane at 313.15 K, 343.15 K, 373.15 K and pressures up to 13.83 MPa were measured. The solubility measurements were undertaken in the designed apparatus. The experimental results show that the solubilities of CO2 in the binary hydrocarbon mixtures are mainly affected by the molecular structure and carbon numbers of hydrocarbon. The more ratios of high-carbon hydrocarbon in the mixtures, the lower solubility of CO2 is. The experimental data were compared with the calculated results of PR and PSRK models. The average absolute relative deviations of bubble pressure were 2.54%-5.66% and 1.45%-7.66%, respectively. Both models gave satisfied results, while the PR was superior to PSRK when the interaction parameters of the relevant systems were provided. PRSK model can calculate the solubility data better near the critical region.

中文翻译:

高压下 CO2 在(己烷 + 环己烷)和(环戊烷 + 乙苯)和(甲苯 + 十一烷)系统中的溶解度

摘要 在这项工作中,测量了 CO2 在 313.15 K、343.15 K、373.15 K 和压力高达 13.83 MPa 的三种不同分子结构的二元烃混合物(己烷 + 环己烷、环戊烷 + 乙苯和甲苯 + 十一烷)中的溶解度。在设计的设备中进行溶解度测量。实验结果表明,CO2在二元烃混合物中的溶解度主要受烃分子结构和碳原子数的影响。混合物中高碳烃的比例越多,CO2 的溶解度越低。将实验数据与PR和PSRK模型的计算结果进行比较。气泡压力的平均绝对相对偏差分别为2.54%-5.66%和1.45%-7.66%。两种模型都给出了满意的结果,而当提供相关系统的交互参数时,PR优于PSRK。PRSK 模型可以更好地计算临界区附近的溶解度数据。
更新日期:2021-03-01
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