The slow oxidation of olefins in gasoline fuels is responsible for gum formation in storage tanks. High-molecular-mass oxidation products can become insoluble and form deposits in the storage tank. These deposits can impact the fuel combustion, injection pattern, and durability of the fuel line parts. In addition, they can significantly increase pollutant emissions. Consequently, it is crucial to develop a robust knowledge base to better understand the effects of biofuels on the performance of fuel system components. In this article, we discuss the modeling of gum formation in blends of Brazilian gasoline with anhydrous ethanol and the implications of experimental procedures.
In this study, different metal ions were added to the sample of gasohol. The samples were then stored for seven, fourteen, and 28 days. The results showed that Cu and Fe were the strongest additives that increased gum formation. Ni, Zn, and Pb showed only minimal or negligible effects. The authors conclude that the effect of metals on gum formation is largely dependent on the degree of oxidation. Therefore, a better understanding of the role of oxidation in fuels is necessary to improve the safety of fuel.
The presence of copper increases gum. Despite the low concentration of copper, absolute ethanol does not contribute to gum in gasoline. In contrast, the presence of copper accelerates gum development. It is also important to understand how the metals affect the stability of the fuel. The study found that the presence of absolute ethanol in diesel had the opposite effect. It accelerated the formation of gum in the fuel, resulting in lower gum levels. 서초역치과
In a similar way, the metal ions in gasohol affect gum formation.
The study of the effects of absolute ethanol and copper on gum formation in gasohol fuels shows that the presence of copper does not accelerate gum formation in this fuel. However, absolute ethanol is not conducive to gum formation in gasoline. Additionally, the presence of copper greatly accelerates gum development. It is important to note that these metals have little or no effect on the stability of diesel. So, if you are unsure of the effect of metals on gum formation, consider your vehicle’s current mileage as a reliable guideline.
In this study, a sample of gasohol was doped with different concentrations of Cu and Fe. They were then tested for gum content. These tests were done after storing the sample for seven, fourteen, and 28 days. It was found that the concentration of these metals has an important effect on gum formation. The more metal ions present in the fuel, the more likely they are to form a solid substance.
It is important to note that the presence of metal ions in gasoline does not influence gum. In fact, it can inhibit gum formation and lead to the accumulation of various other substances in the fuel. The effects of different metal ions in gasohol are similar for gasoline. These findings suggest that the presence of different metal ions in gasohol can influence gum formation in various ways.
The same applies for the presence of Pb and Ni in gasoline.
The study also investigated the effect of absolute ethanol and copper on gum. While absolute ethanol is not conducive to gum, its presence in diesel has a significant effect on gum. Its presence is a major contributor to the gum formation process in the fuel. Thus, the study shows that the presence of ethanol and copper in gasoline and coal both affects the stability of synthetic crudes. These additives make gasoline and coal more stable.
Researchers at SRI have also examined the effects of different metal ions on gum in gasoline and diesel. Their results showed that the presence of copper in diesel fuels has no effect on gum. Moreover, absolute ethanol does not influence gum formation in gasohol. This is due to its stability. It is the presence of copper in the fuel that enables it to form. For this reason, the presence of ethanol in the fuel causes hard deposits on hot engine parts.
In gasoline, gum is intimately associated with the chain termination and propagation of oxidation reactions. Decomposing peroxides in the absence of oxygen leads to the condensation of aldehydes and naphthols. The oxidation of alkylnaphthalenes results in the formation of polymeric oxidation products, which are responsible for deposits in the Jet Fuel Thermal Oxidation Tester JFTOT.