Densities and Volumetric Characteristics of Binary System of CO2 + Decane from (303.15 to 353.15) K and Pressures up to 19 MPa

详细信息    查看全文

• 作者：Yongchen Song ; Weiwei Jian ; Yi Zhang ; Yong Shen ; Yangchun Zhan ; Jiafei Zhao ; Yu Liu ; Dayong Wang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2012
• 出版时间：December 13, 2012
• 年：2012
• 卷：57
• 期：12
• 页码：3399-3407
• 全文大小：481K
• 年卷期：v.57,no.12(December 13, 2012)
• ISSN：1520-5134

文摘

Densities of CO₂ + decane binary mixtures were measured by using the magnetic suspension balance (MSB) at different CO₂ mole fractions, x₁ = 0.2361, 0.4698, 0.7100, 0.7725, and 0.8690 with temperatures from (303.15 to 353.15) K and pressures from (8 to 19) MPa. Excess molar volumes were calculated from the density data. The experimental results revealed that the density of CO₂ + decane mixtures increases with increasing pressure and decreases with increasing temperature. The density of mixtures increases with increasing CO₂ concentration first and then decreases at higher CO₂ concentration and higher temperature. A crossover phenomenon with compositions is observed, and the crossover pressure increases with temperature. The excess molar volumes of this mixture display more negative values with increasing temperature at 18 MPa and less negative values with increasing pressure at 313.15 K. Moreover, the mixture densities have been predicted with GERG-2008 and a modified Benedict鈥揥ebb鈥揜ubin鈥揝tarling (BWRS) model. The validities of the two models have been tested by predicting density data in this work and comparing with previous literature.