Automotive Diesel Fuel Internal Stability Testing with the Use of UV and Temperature as Degradation Factors

Abstract

Diesel fuel stability can be considered from many points of view, of which the two considered most important are stability in contact with the environment and internal stability. Fuel stability in touch with the environment is often defined as oxidation stability, of which measurement procedures are well developed. The presented paper shows that fuel’s internal stability can also be important. The internal stability of diesel fuel with the local use of thermal and ultraviolet radiation (UV) as degradation factors and fluorescence signals as a probe is presented in this paper. We show that the internal degradation of fuel with temperature use differs from that with UV and simultaneous both factors use. Our study shows that using temperature as a degradation factor introduces significant fluorescence fading. Moreover, the fluorescence signal restores significantly later than the sample stabilizes at room temperature. The novelty proposed based on examination is hybrid degradation and an examination cycle that enables the simultaneous use of degradation factors and fluorescence reading. For this purpose, a dedicated measurement setup of signal control and processing was constructed and programmed. The measurement procedure of the data series for specific wavelength enables calculation of signal shifts that allow the internal stability classification of diesel fuel samples in less than 30 min with the cost of a single disposable capillary probe and one polymer plug. Premium and regular fuel examination results show that internal fuel stability can be related to polycyclic aromatic hydrocarbons (PAH) concentrations and can be modified with dedicated additives.

1.4-Dioxane and the Phenolic Compound Against UV Irradiation of Diesel

“…These chemical changes significantly influence the properties and exploitation indicators of the fuel, causing some problems with the stable regime and operation of diesel motors. As metal tanks are now replaced by polymer tanks with visible transparency, the photostability of the fuel becomes important [1,6].…”

Development of a 3D-printed, sensitivity-optimized fluorometer based on ultraviolet LED for VIS fluorescence spectrum analysis

“…Fluorescence sensors are widely used devices for evaluating the photoluminescence-related properties of fluorophores, such as fluorescence emission intensity, spectrum, and polarization [1]. They are versatile optical sensing techniques applied across a broad range of applications, including chemical and biological sensing, environment monitoring , material characterization, and probing energy transfer processes [2][3][4][5]. In general, fluorescence sensors utilize shortwavelength light sources to optically excite fluorophores.…”

“…On the other hand, the use of light-emitting diodes (LEDs) is gaining popularity in fluorescence spectroscopy due to their various benefits, including compactness, lower power consumption, cost-effectiveness, and lower infrared and heat emission [1]. As a result, scientific communities and industries have developed numerous compact fluorescence sensors that utilize LEDs as an excitation source [4][5][6][7].…”