Fluid Phase Equilibria Carbon Dioxide + Decane + Hexadecane Ternary System

IF 2.8 3区工程技术 Q3 CHEMISTRY, PHYSICAL

Fluid Phase Equilibria Pub Date : 2024-08-23 DOI:10.1016/j.fluid.2024.114214

Evelyn Claudia Quinteros Soria, Moacir Frutuoso Leal da Costa, Willam Trujillo Vera, Hugo Andersson Dantas Medeiros, Hosiberto Batista de Sant'Ana, Filipe Xavier Feitosa

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引用次数: 0

Abstract

The interest in understanding reservoir fluids' phase behavior is to increase hydrocarbon production without any flow assurance issues. Due to its opacity, the evident complexity of determining phase equilibrium data revolves around the thermodynamic modeling of model systems. The article presents experimental phase equilibrium data and thermodynamic modeling for the CO₂ + decane + hexadecane ternary system at 283.15, 298.15, and 323.15 K and pressures up to 20 MPa. The transitions observed during this study were liquid-liquid (LL), vapor-liquid (VL), and vapor-liquid-liquid (VLL). The Peng-Robinson equation of state was used to model this ternary system for various compositions. The temperature-dependent binary interaction parameters (k_i_j) for the CO₂ + n-alkane mixtures were adjusted to the experimental data. Additionally, a binary interaction parameter for the n-C₁₆H₃₄/n-C₁₀H₂₂ pair, independent of temperature, was obtained through the critical volume of the components. The results reveal complex behaviors as the mixture's composition of hexadecane progressively increases. Adding this longer-chain linear hydrocarbon influences the phase behavior, leading to the emergence of liquid-liquid transitions and barotropic inversion in the system. This study contributes valuable data on model systems representing crude oil, highlighting complex behaviors in ternary systems with high carbon dioxide content.

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流体相平衡二氧化碳 + 十烷 + 十六烷三元系统

了解储层流体的相行为，是为了在不出现任何流动保证问题的情况下提高碳氢化合物产量。由于其不透明性，确定相平衡数据的明显复杂性围绕着模型系统的热力学建模。文章介绍了二氧化碳+癸烷+十六烷三元体系在 283.15、298.15 和 323.15 K 和高达 20 兆帕压力下的实验相平衡数据和热力学模型。在这项研究中观察到的转变是液-液（LL）、汽-液（VL）和汽-液-液（VLL）。彭-罗宾逊（Peng-Robinson）状态方程被用来模拟不同成分的三元体系。根据实验数据调整了二氧化碳 + 正烷烃混合物与温度相关的二元相互作用参数 (kij)。此外，还通过各组分的临界体积获得了与温度无关的 n-C16H34/n-C10H22 对的二元相互作用参数。结果表明，随着混合物中十六烷成分的逐渐增加，混合物会出现复杂的行为。加入这种长链线性碳氢化合物会影响相行为，导致系统中出现液-液转变和气压反转。这项研究为代表原油的模型系统提供了宝贵的数据，凸显了二氧化碳含量较高的三元系统中的复杂行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fluid Phase Equilibria 工程技术-工程：化工

CiteScore

5.30

自引率

15.40%

发文量

223

审稿时长

53 days

期刊介绍： Fluid Phase Equilibria publishes high-quality papers dealing with experimental, theoretical, and applied research related to equilibrium and transport properties of fluids, solids, and interfaces. Subjects of interest include physical/phase and chemical equilibria; equilibrium and nonequilibrium thermophysical properties; fundamental thermodynamic relations; and stability. The systems central to the journal include pure substances and mixtures of organic and inorganic materials, including polymers, biochemicals, and surfactants with sufficient characterization of composition and purity for the results to be reproduced. Alloys are of interest only when thermodynamic studies are included, purely material studies will not be considered. In all cases, authors are expected to provide physical or chemical interpretations of the results. Experimental research can include measurements under all conditions of temperature, pressure, and composition, including critical and supercritical. Measurements are to be associated with systems and conditions of fundamental or applied interest, and may not be only a collection of routine data, such as physical property or solubility measurements at limited pressures and temperatures close to ambient, or surfactant studies focussed strictly on micellisation or micelle structure. Papers reporting common data must be accompanied by new physical insights and/or contemporary or new theory or techniques.