油的粘度

IF 5.3 3区 工程技术 Q2 ENERGY & FUELS
Eric B. Sirota*, 
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引用次数: 0

摘要

基于修正的vtf方程η(T) = η∞exp{D/[(T/T0)-1]},我们提出了一个框架,用于理解和预测油基体系的温度依赖粘度,该方程涉及到玻璃化转变的方法,即使在远高于它的温度下。我们提供的数据表明,这适用于从沥青、渣油、沥青质和沥青到高通量、稀释和低粘性系统(如柴油)的油,以及润滑油、模型化合物和溶液中的聚合物,它们可以作为润滑油和沥青中的粘度调节剂或添加剂。关键是用两个参数T0和η∞来描述η(T)行为,并确定脆性(D)。这两个参数随组成(即分子量和芳香性)和化学变化(如氧化)而系统变化。最重要的是,这种参数化产生了这些参数的简单线性混合规则,可以预测观察到的高度非线性和有时非单调的行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The Viscosity of Oils

The Viscosity of Oils

We present a framework for understanding and predicting the temperature-dependent viscosity of oil-based systems, based on the Modified-VTF equation η(T) = ηexp{D/[(T/T0)-1]}, which relates to the approach to the glass transition, even at temperatures far above it. We present data showing that this applies to oils ranging from bitumen, resid, asphaltenes, and asphalt to highly fluxed, diluted, and less viscous systems such as diesel, as well as lubricants, model compounds, and polymers in solution, which could be viscosity modifiers or additives in lubes and asphalt. The key is to describe the η(T) behavior with two parameters: T0 and η, and to fix the fragility (D). These two parameters are shown to vary systematically with composition (i.e., MW and aromaticity) and vary systematically with chemical changes such as oxidation. Most significantly, this parametrization results in simple linear blending rules for those parameters, which can predict the observed highly nonlinear and sometimes nonmonotonic behavior.

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来源期刊
Energy & Fuels
Energy & Fuels 工程技术-工程:化工
CiteScore
9.20
自引率
13.20%
发文量
1101
审稿时长
2.1 months
期刊介绍: Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.
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