Solubility of HFCs in Pentaerythritol Tetraalkyl Esters
Solubility of HFCs in Pentaerythritol Tetraalkyl Esters
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DOI：
10.1021/je990171n
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发表时间：
2000-02
影响因子：
--
通讯作者：
Å. Wahlström;Lennart Vamling
中科院分区：
文献类型：
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作者：
Å. Wahlström;Lennart Vamling
测量了二氟甲烷（HFC32）、1,1,1,2,2-五氟乙烷（HFC125）、1,1,1,2-四氟乙烷（HFC134a）、1,1,1-三氟乙烷（HFC143a）和1,1-二氟乙烷（HFC152a）在季戊四醇四烷酸盐、季戊四醇四-2-乙基丁酸盐和季戊四醇四-2-乙基己酸盐中的溶解度，温度在303至363 K之间，压力在0.07至2.1 MPa之间。对于低于0.34 MPa的测量，推导了无限稀释条件下氢氟碳化合物的亨利常数和活度系数。测量采用等弦法，不确定度为HFC134a > HFC32 > HFC125 > HFC143a。实验数据与具有扩展温度依赖性的Flory - Huggins模型相关，该模型能够描述与测量数据偏差<2.7%的数据。
The solubilities of difluoromethane (HFC32), 1,1,1,2,2-pentafluoroethane (HFC125), 1,1,1,2-tetrafluoroethane (HFC134a), 1,1,1-trifluoroethane (HFC143a), and 1,1-difluoroethane (HFC152a) in pentaerythritol tetranonanoate, pentaerythritol tetra-2-ethylbutanoate, and pentaerythritol tetra-2-ethylhexanoate have been measured at temperatures between 303 and 363 K and pressures between 0.07 and 2.1 MPa. Henry's constant and the activity coefficient for HFCs at infinite dilution were derived for measurements below 0.34 MPa. The measurements were made by an isochoric method with an uncertainty of HFC134a > HFC32 > HFC125 > HFC143a. The experimental data have been correlated with a Flory−Huggins model with an extended temperature dependence, which is able to describe the data with a deviation from measured data of <2.7%.