Dissolution behavior of different additives and lubricating oil blends in liquid and supercritical CO2

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2025-04-01 DOI:10.1016/j.supflu.2025.106615

Nathalie Piche, Stefan Pollak, Marcus Petermann

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引用次数: 0

Abstract

Cryogenic Minimum Quantity Lubrication (cMQL) with oil and liquid or supercritical CO₂ provides efficient cooling and lubrication for machining difficult-to-cut materials. For drilling, oil and CO₂ should be in a single-phase state to avoid separation in the fast-rotating drill spindle before expanding at the drill tip. This article presents the phase behavior, dissolution kinetics and expansion behavior of three sulfur-based additives and three additive-oil blends with CO₂. Phase behavior is analyzed at 25 °C, 40 °C, and 60 °C between 60 bar and 250 bar. Dissolution kinetics are observed in a transparent flow cell and correlated with phase behavior. Trisulfide and polysulfide additives show high solubility and rapid homogenization, while a sulfurized methyl ester exhibits insufficient dissolution behavior. Oil blends reflect the behavior of their components. Expansion of the oil-CO₂ mixtures at the drill tip was investigated using a high-speed camera. A fine, homogeneous spray was observed under all conditions.

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不同添加剂和润滑油混合物在液体和超临界CO2中的溶解行为

低温最小量润滑（cMQL）与油和液体或超临界二氧化碳提供有效的冷却和润滑加工难切割的材料。钻井时，油和CO2应处于单相状态，以避免在快速旋转的钻轴中分离，然后在钻尖处膨胀。本文介绍了三种硫基添加剂和三种添加剂-油共混物与CO2的相行为、溶解动力学和膨胀行为。在25°C， 40°C和60°C下，在60 bar和250 bar之间分析相行为。在透明流动池中观察了溶解动力学，并与相行为相关联。三硫化物和多硫化物添加剂具有高溶解度和快速均质性，而硫化甲酯则表现出不充分的溶解行为。混合油反映了其成分的行为。使用高速摄像机研究了油-二氧化碳混合物在钻头尖端的膨胀情况。在所有条件下均可观察到细小均匀的喷雾。

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

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.