• Jakob, Markus
• Albert, Jakob
• Singer, Anja
• Schröder, Olaf
• Türck, Julian
• Krahl, Jürgen
• Garbe, Thomas
• Poller, Maximilian J.
• Lichtinger, Anne

Abstract

<jats:p>This paper contributes to the ongoing dialogue regarding the future application of renewable e‐fuels as part of a holistic solution to the energy crisis. In order to be able to continue using internal combustion engines in a sustainable manner, it must be ensured that these engines are operated exclusively with renewable, CO<jats:sub>2</jats:sub>‐neutral fuels. One way to achieve this is the use of a fluorescence sensor in the vehicle in combination with fuels that are labeled with a fluorescence marker. This study presents an investigation into the use of the benzophenoxazine dye Nile Red as a fluorescent marker for distinguishing fossil from renewable fuels. In addition to assessing the stability of the fluorescent marker against thermo‐oxidative aging, the study probes its antioxidative impact on fuel aging, by comparing unlabeled and with Nile Red labeled aged fuels. Fourier transform infrared spectroscopy measurements reveals the formation of aging products in the unlabeled fuels and the absence of such products in the fuels labelled with Nile Red, thereby indicating that the addition of Nile Red inhibits fuel aging. Furthermore, an examination of fuel‐specific parameters underscores the positive effect of Nile Red on fuel stability. A comparison with the antioxidant butylated hydroxytoluene (BHT) confirms the antioxidant effect of Nile Red.</jats:p><jats:p>This article is protected by copyright. All rights reserved.</jats:p>

Topics

• impedance spectroscopy
• combustion
• aging
• Fourier transform infrared spectroscopy
• aging