Purely Predictive Vapor–Liquid Equilibrium Properties of 3,3,4,4,4-Pentafluoro-1-butene (HFO-1345fz), 2,3,3,4,4,4-Hexafluoro-1-butene (HFO-1336yf), and trans-1-Chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd(E)) from Molecular Simulation

Purely Predictive Vapor–Liquid Equilibrium Properties of 3,3,4,4,4-Pentafluoro-1-butene (HFO-1345fz), 2,3,3,4,4,4-Hexafluoro-1-butene (HFO-1336yf), and trans-1-Chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd(E)) from Molecular Simulation
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3,3,4,4,4-五氟-1-丁烯 (HFO-1345fz)、2,3,3,4,4,4-六氟-1-丁烯 (HFO-1336yf) 的纯预测气液平衡性质和反式 1-氯-2,3,3,3-四氟丙烯 (HCFO-1224yd(E)) 来自分子模拟

DOI:
10.1021/acs.jced.0c00325
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发表时间:
2020
影响因子:
--
通讯作者:
Raabe G.
Raabe G.
中科院分区:
工程技术3区
文献类型:
--
作者:
Raabe G.

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我们先前引入了一种相关性来估计Lennard-Jones(LJ)参数,用于在我们的力场中对具有不同数量的键合氟原子的氢氟烯烃(HFO)的氟原子类型进行建模,并且另外引入了用于氯原子类型的新LJ参数(Raabe,G.J.Chem.Eng.Data2020,65,1234-1242.)。基于这种新的分子间相互作用的模拟方法,本文给出了含氟丁烯3,3,4,4,4-五氟-1-丁烯(HFO-1345 fz)和2,3,3,4,4,4-六氟-1-丁烯(HFO-1336 yf)以及含氯化合物反式-1-氯-2,3,3,3-双丙烯(HCFO-1224 yd(E))的纯预测性分子模拟结果。为此,这些化合物中新出现的分子内力场项的参数也被导出。为了允许复制的复杂的扭转配置文件中的丁烯化合物的二面角,一个不同的功能的形式,到目前为止,这里引入模型的扭转势项。我们提供分子模拟结果的蒸汽压,饱和密度,这些化合物的汽化热,以及估计其临界性质和正常沸点。模拟结果,然后使用这些化合物的PC-SAFT状态方程的建模参数。
We previously introduced a correlation to estimate the Lennard-Jones (LJ) parameters for the modeling of the fluorine atom type in our force field for hydrofluoroolefins (HFO) with a varying number of bonded fluorine atoms and additionally new LJ parameters for the chlorine atom type (Raabe, G.J. Chem. Eng. Data2020,65, 1234–1242.). On the basis of this new modeling approach for the intermolecular interactions, we here present purely predictive molecular simulation results for fluorinated butenes 3,3,4,4,4-pentafluoro-1-butene (HFO-1345fz) and 2,3,3,4,4,4-hexafluoro-1-butene (HFO-1336yf) and for chlorinated compoundtrans-1-chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd(E)). For this purpose, parameters for newly occurring intramolecular force field terms in these compounds were also derived. To allow for a reproduction of the complex torsion profiles for dihedrals in the butene compounds, a different functional form as used so far is introduced here to model the torsion potential term. We provide molecular simulation results for the vapor pressures, saturated densities, and heats of vaporization of these compounds as well as estimates of their critical properties and normal boiling points. The simulation results are then used to derive parameters for the modeling of these compounds by the PC-SAFT equation of state.
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