Experimental Study of the Impact of Diesel/Biodiesel Blends Oxidation on the Fuel Injection System

“…Besides, the TAN does not provide any molecular information. Nevertheless, it is an interesting technique since a strong relationship between the TAN increase and insoluble deposits formation during oxidation process has been reported in the literature 16,19,20 . Therefore, a more detailed characterization of oxidized MO samples was performed with GC-MS.…”

Section: Discussionmentioning

confidence: 99%

“…Online analysis of the sample during the oxidation may help addressing this issue. Previous works have implemented online analysis during hydrocarbon oxidation using different reactors such as stirred reactors 16,17 or autoclaves 18 . These reactors allow the monitoring of the oxidation products in both the liquid and the gas phases at a higher sampling frequency.…”

Section: Discussionmentioning

confidence: 99%

Original Experimental Approach for Assessing Transport Fuel Stability

Bacha¹,

Amara²,

Fortunato³

et al. 2016

JoVE

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The study of fuel oxidation stability is an important issue for the development of future fuels. Diesel and kerosene fuel systems have undergone several technological changes to fulfill environmental and economic requirements. These developments have resulted in increasingly severe operating conditions whose suitability for conventional and alternative fuels needs to be addressed. For example, fatty acid methyl esters (FAMEs) introduced as biodiesel are more prone to oxidation and may lead to deposit formation. Although several methods exist to evaluate fuel stability (induction period, peroxides, acids, and insolubles), no technique allows one to monitor the real-time oxidation mechanism and to measure the formation of oxidation intermediates that may lead to deposit formation. In this article, we developed an advanced oxidation procedure (AOP) based on two existing reactors. This procedure allows the simulation of different oxidation conditions and the monitoring of the oxidation progress by the means of macroscopic parameters, such as total acid number (TAN) and advanced analytical methods like gas chromatography coupled to mass spectrometry (GC-MS) and Fourier Transform Infrared -Attenuated Total Reflection (FTIR-ATR). We successfully applied AOP to gain an in-depth understanding of the oxidation kinetics of a model molecule (methyl oleate) and commercial diesel and biodiesel fuels. These developments represent a key strategy for fuel quality monitoring during logistics and on-board utilization.

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“…Thirdly, biodiesel has poor thermal stability compared to ULSD fuel. This may lead to fuel fouling issues in the fuel injection systems of modern diesel engines (Amara et al, 2014). Fourthly, biodiesel typically increases oxides of nitrogen emissions slightly (Hoekman and Robbins, 2012).…”

Section: Biodiesel and Hdrdmentioning

confidence: 99%