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An easy correlation to determine soluble and insoluble fraction in diesel particulate matter

机译:一种易于关联的方法,可确定柴油颗粒物中的可溶物和不溶物

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摘要

Mathematical fitting of experimental emission data from five different fuels and three mixtures of biodiesel and reference diesel operating under diverse conditions allows to propose an easy equation to calculate both the insoluble and soluble fractions in Diesel Particulate Matter. The relative importance of each mechanism involved in the DPM formation process is also mathematically quantified. Two different mechanisms are principally found to take place during DPM formation. In a first stage (scrubbing effect), adsorbed sulphuric acid reacts with organic compounds in the exhaust to form heavy hydrocarbons which are likely to remain in the condensed phase. The remaining hydrocarbons undergo an absorption process and are retained on particles in the liquid phase. However, some light hydrocarbons may escape from the filter system and are not quantified as soluble organic fraction (SOF). The presence of two retention mechanisms makes it necessary to develop an accurate extraction technique to quantify the soluble organic fraction.
机译:在不同条件下运行的五种不同燃料以及三种生物柴油和参考柴油的混合物的实验排放数据的数学拟合,使得可以提出一个简单的方程式来计算柴油机微粒物质中的不溶和可溶成分。 DPM形成过程中涉及的每种机制的相对重要性也在数学上进行了量化。主要发现在DPM形成过程中发生了两种不同的机制。在第一阶段(洗涤效果),吸附的硫酸与废气中的有机化合物反应形成重烃,这些烃很可能保留在冷凝相中。剩余的碳氢化合物经过吸收过程,并保留在液相中的颗粒上。但是,某些轻质碳氢化合物可能会从过滤器系统中逸出,因此没有被量化为可溶性有机馏分(SOF)。两种保留机制的存在使得有必要开发一种精确的提取技术来定量可溶性有机部分。

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