Diesel fuel composition

Abstract

Disclosed is a diesel fuel composition obtained by mixing a diesel oil and a biodiesel oil, which can be used in popular diesel cars. The diesel fuel composition enables remarkable reduction in sludge formation. Specifically disclosed is a diesel fuel composition obtained by mixing a diesel oil containing an aromatic component and a biodiesel oil. The diesel fuel composition is characterized in that the biodiesel oil content in the diesel fuel composition is 10-50% by volume, and the aromatic component content in the diesel oil is not less than 30% by volume.

Description

TECHNICAL FIELD[0001]The present invention relates to a diesel fuel composition made by mixing diesel fuel oil and biodiesel, and in particular relates to a diesel fuel composition that can be used in diesel vehicles in widespread use, and can greatly reduce sludge formation.BACKGROUND ART[0002]In recent years, biodiesel has gained attention as a fuel for diesel engines from the view point of a measure to deal with global warming. Biodiesel is a fuel having a fatty acid methyl ester (Fatty Acid Methyl Ester: FAME) component obtained by methyl esterification of fats and oils derived from living things by way of various methods. Investigation into a diesel fuel composition made by adding a predetermined amount of such biodiesel into diesel fuel oil and mixing has been making process.[0003]From the view point of carbon neutrality, a larger additive amount of biodiesel added into diesel fuel oil is preferred. However, if the additive amount of biodiesel exceeds a certain constant value,...

AI Technical Summary

Benefits of technology

[0024]According to the present invention, it is possible to provide a diesel fuel composition, which is a diesel fuel composition made by mixing diesel fuel oil and biodiesel, that can be used in diesel vehicles in widespread use, and can greatly reduce sludge formation. Furthermore, it is possible to provide a diesel fuel composition that can avoid trouble occurring such as clogging of the fuel filter.

Problems solved by technology

However, if the additive amount of biodiesel exceeds a certain constant value, the amount of heat generation by the diesel engine will decrease, and it will not be possible to heat the diesel particulate filter (DPF) to high temperature.

As a result, the regenerative ability of the DPF will decrease, and particulate matter (PM) will collect on the DPF and accumulate, resulting in it being difficult for exhaust gas itself to be emitted.

For example, high-concentration biodiesel fuel is considered unusable in common-rail type diesel engine systems.

This is because, in addition to the phenomenon described above, the generation of injector deposits and combustion deposits, decline in rail pressure due to clogging of the fuel filter, and deterioration to fuel hoses made of resin occur easily, and thus come to be a hindrance in realization of safe operation of the vehicle.

However, at present, the additive amount of biodiesel added into diesel fuel oil is limited to no higher than 5% by volume, as general distribution fuel in the EU.

High concentration enrichment of biodiesel is a cause of sludge formation along with oxidative degradation, which may induce clogging of the injectors, fuel filter, piping and the like, in addition to having a negative influence on vehicle performance.

According to this technology, it is considered possible to reduce the generated amount of PM by raising the caloric amount during combustion and suppress the formation of sludge during storage, while simultaneously achieving effective utilization of catalytically cracked diesel fuel oil, which has been considered difficult to use conventionally.

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