用DSH分析技术测定纯CO2和富CO2混合物中的水分含量

IF 2.8 3区工程技术 Q3 CHEMISTRY, PHYSICAL

Fluid Phase Equilibria Pub Date : 2025-07-05 DOI:10.1016/j.fluid.2025.114523

Larissa F. Torres , Antonin Chapoy , Rod Burgass , Cláudio Dariva , Papa M. Ndiaye , Frederico W. Tavares

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引用次数: 0

摘要

准确测定与水合物平衡的含水量有助于防止与流动保证相关的操作问题，并且对于新兴的碳捕集与封存（CCS）脱碳过程至关重要。然而，与这些测量相关的实验挑战导致数据稀缺。差示扫描湿度计（DSH）方法的发展增加了与水合物平衡的富二氧化碳系统的含水量报告数量。它监测的不是绝对数值，而是由于在一个温控管内形成冰或露水而引起的含水量波动。在此，我们对纯CO2和两种富含CO2的混合物（CO2+CH4和CO2+CH4+N2）与水合物平衡时的含水量进行了实验和建模研究：使用sCPA和SRK+EMS状态方程对得到的实验数据进行了建模，均使用van der Waals-Platteeuw （vdW-P）模型来模拟水合物相。

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Water content in pure CO2 and CO2-rich mixtures using the DSH analytical technique

The accurate determination of water content in equilibrium with hydrates helps to prevent operational problems related to flow assurance, and it is essential for the emerging Carbon Capture and Storage (CCS) processes for decarbonization. However, the experimental challenges associated with these measurements cause a scarcity of data. The development of the Differential Scanning Hygrometer (DSH) method has increased the number of water content reports for CO₂-rich systems in equilibrium with hydrates. It monitors not absolute values but fluctuations in the water content due to the formation of ice or dew inside a temperature-controlled tube. Here, we provide experimental and modeling investigation for water content on pure CO₂ and two CO₂-rich mixtures (CO₂+CH₄ and CO₂+CH₄+N₂) in equilibrium with hydrates: the sCPA and the SRK+EMS equations of state were used to model the obtained experimental data, both using the van der Waals-Platteeuw (vdW-P) model for the hydrate phase.

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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.