Abstract Diesel fuel is composed of a complex mixture of hundreds of hydrocarbons that vary globally depending on crude oil sources, refining processes, legislative requirements and other factors. In order to simplify the study of this fuel, researchers create surrogate fuels to mimic the physical and chemical properties of Diesel fuels. This work employed the commercial software Reaction Workbench – Surrogate Blend Optimizer (SBO) to develop a Surrogate Fuel Library containing 18 fuels. Within the fuel library, the cetane number ranges from 35 to 60 (in increments of 5) at threshold soot index (TSI) levels representative of low, baseline and high sooting tendency fuels (TSI = 17, 31 and 48, respectively). The Surrogate Fuel Library provides the component blend ratios and predicted properties for cetane number, threshold soot index, lower heating value, density, kinematic viscosity, molar hydrogen-to-carbon ratio and distillation curve temperatures from T 10 to T 90 . A market petroleum Diesel fuel with a cetane number of 50 and a threshold soot index of 31 was selected as the Baseline Diesel Fuel. The combustion, physical and chemical properties of the Baseline Diesel Fuel were precisely matched by the Baseline Surrogate Fuel. To validate the SBO predicted fuel properties, a set of five surrogate fuels, deviating in cetane number and threshold soot index, were blended and examined with ASTM tests. Good agreement was obtained between the SBO predicted and ASTM measured fuel properties. To further validate the Surrogate Fuel Library, key properties that were effected by altering the component blend ratios to control cetane number and TSI were compared to a set of five market Diesel fuels with good results. These properties included density, viscosity, energy density and the T 10 and T 90 distillation temperatures. The Surrogate Fuel Library provided by this work supplies Diesel engine researchers and designers the ability to analytically and experimentally vary fuel cetane number and threshold soot index with fully-representative surrogate fuels. This new capability to independently vary cetane number and threshold soot index provides a means to further enhance the understanding of Diesel combustion and design future combustion systems that improve efficiency and emissions.

中文翻译：

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柴油替代燃料库的开发

摘要 柴油燃料由数百种碳氢化合物的复杂混合物组成，这些碳氢化合物在全球范围内因原油来源、精炼工艺、立法要求和其他因素而异。为了简化对这种燃料的研究，研究人员创造了替代燃料来模拟柴油燃料的物理和化学特性。这项工作采用商业软件 Reaction Workbench – Surrogate Blend Optimizer (SBO) 来开发包含 18 种燃料的替代燃料库。在燃料库中，十六烷值范围为 35 到 60（以 5 为增量），阈值烟灰指数 (TSI) 水平代表低、基线和高烟灰趋势燃料（TSI 分别为 17、31 和 48）。替代燃料库提供了十六烷值、阈值烟灰指数、较低的热值、密度、运动粘度、氢碳摩尔比和蒸馏曲线温度从 T 10 到 T 90 。选择十六烷值为 50 且阈值烟灰指数为 31 的市场石油柴油作为基准柴油燃料。基准柴油燃料的燃烧、物理和化学特性与基准替代燃料精确匹配。为了验证 SBO 预测的燃料特性，将一组在十六烷值和阈值碳烟指数方面存在偏差的五种替代燃料混合并通过 ASTM 测试进行检查。SBO 预测的燃料特性与 ASTM 测量的燃料特性之间获得了良好的一致性。为了进一步验证替代燃料库，通过改变组分混合比来控制十六烷值和 TSI 所影响的关键特性与一组五种市场柴油燃料进行了比较，结果良好。这些特性包括密度、粘度、能量密度以及T 10 和T 90 蒸馏温度。这项工作提供的替代燃料库为柴油发动机研究人员和设计人员提供了分析和实验改变燃料十六烷值和具有完全代表性的替代燃料阈值碳烟指数的能力。这种独立改变十六烷值和阈值烟尘指数的新功能提供了一种方法，可以进一步增强对柴油燃烧的理解，并设计出可提高效率和排放的未来燃烧系统。能量密度和T 10 和T 90 蒸馏温度。这项工作提供的替代燃料库为柴油发动机研究人员和设计人员提供了分析和实验改变燃料十六烷值和具有完全代表性的替代燃料阈值碳烟指数的能力。这种独立改变十六烷值和阈值烟尘指数的新功能提供了一种方法，可以进一步增强对柴油燃烧的理解，并设计出可提高效率和排放的未来燃烧系统。能量密度和T 10 和T 90 蒸馏温度。这项工作提供的替代燃料库为柴油发动机研究人员和设计人员提供了分析和实验改变燃料十六烷值和具有完全代表性的替代燃料阈值碳烟指数的能力。这种独立改变十六烷值和阈值烟尘指数的新功能提供了一种方法，可以进一步增强对柴油燃烧的理解，并设计出可提高效率和排放的未来燃烧系统。