Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11000684 | The Journal of Chemical Thermodynamics | 2019 | 35 Pages |
Abstract
The liquid-liquid coexistence curves in a temperature range of about 10â¯K from the upper consolute critical temperature for binary solutions of {dimethyl carbonateâ¯+â¯pentadecane} and {dimethyl carbonateâ¯+â¯heptadecane} have been precisely measured. The upper consolute mole fraction xc of n-alkane and the upper consolute temperature Tc were determined to be xcâ¯=â¯0.210, Tcâ¯=â¯312.234â¯K for {dimethyl carbonateâ¯+â¯pentadecane} and xcâ¯=â¯0.183, Tcâ¯=â¯320.496â¯K for {dimethyl carbonateâ¯+â¯heptadecane}, respectively. From the data collected in the near critical point, the critical exponent β was deduced and shown to be consistent well with its theoretical value for the 3-D Ising universality class. The dependences of critical properties on the chain length of n-alkane for a series of {dimethyl carbonateâ¯+â¯n-alkane} binary solutions were investigated. Furthermore, it was found that the asymmetric behaviors of the coexistence curve could be well described by the complete scaling theory. The contribution of the heat capacity related term to the asymmetric behaviors of the coexistence curves was discussed.
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yimin Guo, Aiqin Shi, Zhiyun Chen, Weiguo Shen,