Impact of HEFA Feedstocks on Fuel Composition and Properties in Blends with Jet A,Energy & Fuels

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Impact of HEFA Feedstocks on Fuel Composition and Properties in Blends with Jet A
Energy & Fuels ( IF 5.2 ) Pub Date : 2018-09-28 00:00:00 , DOI: 10.1021/acs.energyfuels.8b02787
Petr Vozka ₁ , Pavel Šimáček ₂ , Gozdem Kilaz ₁

Affiliation

Alternative aviation fuels and their approval process contribute to one of the biggest challenges in deployment of an enhanced volume of aviation fuels. One of the approved fuel blending components is hydroprocessed esters and fatty acids (HEFAs) for mixing with petroleum-derived fuel (Jet A/A-1) up to 50 vol %. As the ASTM fuel specification (D7566) is merely based on the performance expected, the final blend concentration of HEFA in Jet A/A-1 can vary depending on the resultant fuel properties. Currently, there is a lack of information on how these properties are affected by the constituent chemical composition. The aim of this study was to compare three HEFAs sourced from different feedstocks (camelina, tallow, and mixed fat) and their blends with Jet A (10–60 vol %) based on the detailed chemical composition. The chemical composition was obtained using two-dimensional gas chromatography with mass spectrometry and flame ionization detector. The properties of interest were the distillation profile, density, viscosity, flash point, freezing point, and net heat of combustion. The key observation was that the distillation profile had the main impact on the final fuel properties. Additionally, the selection of the feedstock or the process conditions yielding an end HEFA composition can adversely affect properties, such as viscosity and/or freezing point.

中文翻译：

HEFA原料对喷气A混合燃料的组成和性能的影响

替代性航空燃料及其批准程序是部署增加数量的航空燃料所面临的最大挑战之一。批准的燃料调和组分之一是加氢处理的酯和脂肪酸（HEFA），用于与石油衍生的燃料（Jet A / A-1）混合，混合比例最高为50 vol％。由于ASTM燃料规格（D7566）仅基于预期的性能，因此Jet A / A-1中HEFA的最终混合浓度会根据所得的燃料特性而变化。当前，缺乏关于这些化学性质如何影响这些性质的信息。这项研究的目的是根据详细的化学成分，比较三种源自不同原料（山茶，牛脂和混合脂肪）的HEFA及其与Jet A的掺混物（10–60 vol％）。使用具有质谱法的二维气相色谱法和火焰离子化检测器获得化学组成。感兴趣的性质是蒸馏曲线，密度，粘度，闪点，凝固点和净燃烧热。关键观察结果是，蒸馏曲线对最终燃料的性能有主要影响。另外，原料的选择或产生最终HEFA组合物的工艺条件可能不利地影响性质，例如粘度和/或凝固点。关键观察结果是，蒸馏曲线对最终燃料的性能有主要影响。另外，原料的选择或产生最终HEFA组合物的工艺条件可能不利地影响性质，例如粘度和/或凝固点。关键观察结果是，蒸馏曲线对最终燃料的性能有主要影响。另外，原料的选择或产生最终HEFA组合物的工艺条件可能不利地影响性质，例如粘度和/或凝固点。

更新日期：2018-09-28

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