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Fuel compositions

a technology of fuel composition and aromatic constituents, which is applied in the direction of fuels, liquid carbonaceous fuels, petroleum industry, etc., can solve the problems of adverse influence on the performance of the engine blend, can be difficult to achieve, and affect the manner, so as to reduce the phase separation temperature of the fuel composition, and increase the level of aromatic constituents in the fuel composition

Inactive Publication Date: 2007-08-02
SHELL OIL CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011] Further, a method of reducing the phase separation temperature of a fuel composition containing a gas oil base fuel and an alkyl levulinate is provided, said method comprising increasing the level of aromatic constituents in the fuel composition.

Problems solved by technology

Moreover, the conditions under which the engine is required to operate can affect the manner in which a fuel composition in the engine will behave.
The blending of a standard commercial diesel base fuel with other fuel components, to modify the overall fuel properties and / or performance, can therefore have an adverse impact on the performance of the blend in the engines for which it is intended.
This can, however, be difficult to achieve because any additional fuel component is likely to alter the properties and performance of the base fuel.
Moreover the properties of a blend, in particular its effect on low temperature performance, are not always straightforward to predict from the properties of the constituent fuels alone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0074] The miscibility of levulinates depends to some extent on base fuel properties. Two base fuels representative of the European market were chosen to explore this effect, i.e. (1) Fuel A was a Dreyfuss ULSD, a hydrotreated AGO having a cloud point of −27° C. and an aromatics content of 22% m; and (2) Fuel B was a Swedish Class 1 AGO, which is a low density, low aromatics (4% m) diesel fuel with a cloud point of −38° C. Both base fuels met the EN590 specification.

[0075] The properties of Fuels A and B are given in Table 1.

TABLE 1Fuel AFuel BDensity @ 15° C.,822815kg / m3Distillation T50,242235° C.Distillation T95,304272° C.Cetane Number5454Viscosity @40° C.,2.102.03mm2 / sSulphur, mg / kg10Cloud Point, ° C.−27−38Aromatics, % m224

[0076] For screening purposes, a simple test method was used to determine the room temperature (20° C.) limit of miscibility of ethyl levulinate. Accurately metered volumes of ester were added sequentially to a known volume of diesel fuel in a 15 ml glass vi...

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PUM

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Abstract

A fuel composition containing a gas oil base fuel, an alkyl levulinate and one or more additional components, each of which components contains one or more aromatic constituents is provided. A method of reducing the phase separation temperature of a fuel composition is described.

Description

FIELD OF THE INVENTION [0001] The present invention relates to fuel compositions comprising a gas oil base fuel. BACKGROUND OF THE INVENTION [0002] Two different fuel components can be blended to modify the properties and / or the performance, e.g. engine performance, of the resultant composition. [0003] Diesel fuel components can include the so-called “biofuels” which derive from biological materials. Examples include levulinate esters. [0004] Levulinate esters (esters of levulinic acid) and their preparation by reaction of the appropriate alcohol with furfuryl acetate are described in Zh. Prikl. Khim. (Leningrad) (1969) 42(4), 958-9, and in particular the methyl, ethyl, propyl, butyl, pentyl and hexyl esters. [0005] WO-A-94 / 21753 discloses fuels for internal combustion engines, including both gasoline and diesel fuel, containing proportions (e.g. 1 to 90% v, 1 to 50% v, preferably 1 to 20% v) of esters of C4-6 keto-carbonic acids, preferably levulinic acid, with C1-22 alcohols. Este...

Claims

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Application Information

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IPC IPC(8): C10L1/18
CPCC10L1/026C10L1/14C10L1/19C10L1/1616C10L1/1608
Inventor HAAN, JOHANNES PIETERLOUIS, JURGEN JACOBUS JOHANNESSTEVENSON, PAUL ANTHONY
Owner SHELL OIL CO
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