Fuel emulsion

FIELD: chemistry.

SUBSTANCE: invention relates to a fuel emulsion for Diesels based on Diesel fuel with the addition of an alcohol, an emulsifier, a mixture of diethanolamine soaps and oleic acid and water, with the fuel composition additionally containing the lubricating additive DPA-Lubricor with the following component ratio, %: ethanol 5.0-50.0; water 0.5-5.0, alkenylsuccinimide 0.25-1.0; mixture of soaps of diethanolamine and oleic acid 0.2; lubricating additive 0.02; Diesel fuel - to 100.

EFFECT: application of the fuel emulsion makes it possible to reduce the rigidity of the burning process, reduce wear in fuel equipment and cylinder-piston group, and thus increase the Diesel reliability and service term.

2 tbl, 1 dwg

 

The invention relates to fuels, in particular for fuel emulsions for diesel engines.

Known fuel emulsion diesel fuel containing, %: alcohol 5,0-40,0; water 0,5-5,0; alkenylamine, 0,25-0,5; potassium stearate and 0.25-0.5; diesel fuel - up to 100 [1].

The disadvantage of this fuel emulsion is the increased rigidity of the combustion process in a diesel engine in production on the emulsion, reduce the reliability and durability of diesel.

Closest to the technical essence and the achieved result to the proposed is a fuel emulsion diesel fuel containing, %: alcohol 5,0-40,0; water 0,5-5,0; alkenylamine 0,25-1,0; the mixture was washed diethanolamine and oleic acid - 0,2; diesel fuel - up to 100 [2].

As a disadvantage of this fuel emulsion can note the increased wear of the fuel system and the cylinder group, which reduces the reliability and durability of the diesel.

The aim of the invention is to increase the lubricating properties of the fuel emulsion and reducing the stiffness of the combustion process, thereby increasing the reliability and durability of the diesel.

Essential difference of the proposed fuel emulsion from all previously known solutions is the introduction into the emulsion and lubricating additives ADP-Lubricon, which contains a mixture of carboxylic acids, inhibitor� oxidation and destruction of the emulsion in an aromatic solvent in the amount of - 0,02%.

The advantages of the proposed fuel emulsion are caused by the following circumstances.

Diesel fuel (up to 100%) is of lighter phase (oil), plays the role of the dispersion medium.

Ethanol (5,0...50%) is used to replace diesel fuel alternative, plays the role of the continuous phase.

Water (0,5...5,0%) can improve the stability of the fuel emulsion and (or) use for its preparation the raw alcohol (raw).

Alkenylamine (0,25...1%) plays the role of an emulsifier to ensure stable fuel emulsion.

The mixture was washed diethanolamine and oleic acid (0.2%) can improve dispersing and lubricating properties of the emulsion and to reduce the rigidity of the combustion process of a diesel engine.

Additive ADP-Lubricon consisting of a mixture of carboxylic acids, oxidation inhibitors and the destroyers emulsion in an aromatic solvent in the amount of 0.02% of the volume of fuel can increase lubricity fuel emulsion and simultaneously reduce the rigidity of the combustion process as a result of the action of oxidation inhibitors, which slows the chemical reactions of the combustion process.

Thus the corrected wear scar diameter of drops to 350-400 μm when the value 530-550 µm for pure diesel fuel (see tab. 1)

�yet, the combustion process in a diesel engine is estimated on the indicator diagram, the numerical values of the maximum combustion pressure ΡZand of pressure rise per degree of rotation of the crankshaft (stiffness) process (dP/dφ)max. Thus, the smaller the value of the rigidity of the process of combustion and the maximum pressure in the same conditions, the more effective, more economical and durable operation of a diesel engine [3].

Fig. 1 shows an indicator diagram of a diesel engine during its operation in the nominal mode.

Line 1 characterizes the operation of the diesel fuel emulsions with a content of up to 40% ethanol and 1% emulsifier - alkenylsilanes and potassium stearate and 0.25%.

Line 2 represents the change in pressure in the cylinder of a diesel engine in production on fuel emulsion with a content of up to 40% ethanol and 1% emulsifier - alkenylamine, mixtures of Soaps of diethanolamine and oleic acid in the amount of 0.2%.

Line 3 - fuel emulsion with a content of up to 40% ethanol and 1% emulsifier - alkanolamine and mixtures of Soaps of diethanolamine and oleic acid in the amount of 0.2% and an additional introduction into the emulsion additive ADP-Lubricon in the amount of 0.02%.

Point (A) characterizes the moment of the beginning of fuel injection, point (B) - the moment of ignition, the point PZ- the maximum value of the combustion process, and the angle of inclination to the horizontal curve on�Astana pressure - the rigidity of the combustion process.

The work of a diesel engine is characterized as follows.

When serving in diesel fuel emulsions with a content of up to 40% ethanol and 1% emulsifier - alkenylsilanes and potassium stearate and 0.25% causes a change in the ignition, resulting in increased stiffness of the combustion process is the buildup of pressure in the cylinder of a diesel engine occurs intensively - line 1.

Work on diesel fuel emulsions with a content of up to 40% ethanol and 1% emulsifier - alkanolamine and mixtures of Soaps of diethanolamine and oleic acid in the amount of 0.2% leads to a decrease of stiffness of the combustion process is the buildup of pressure in the cylinder of a diesel engine occurs more smoothly - line 2.

The additional introduction of lubricity additives ADP-Lubricon in fuel emulsion leads to a further decrease in the stiffness of the combustion process - the rate of pressure rise in the cylinder of a diesel engine even more reduced and the combustion proceeds very smoothly - line 3.

Digital values of the combustion process in a diesel engine during its operation are shown in table 2 limits.

The emulsion is prepared as follows.

Prepare a number that is a multiple of 100 g. this requires the amount of water dissolved in ethanol, and the right amount of alkanolamine and mixtures of Soaps of diethanolamine and oleic acid�you dissolve in diesel fuel, then dissolve the additive ADP-Lubricon consisting of a mixture of carboxylic acids, oxidation inhibitors and the destroyers emulsion in an aromatic solvent with diesel fuel in a ratio of 1:5. All phases in the aforementioned proportions are mixed and subjected to dispersion.

Feasibility study of the proposed invention lies in the possibility of reducing the wear of the cylinder group, fuel equipment and rigidity of the combustion process, thereby increasing the reliability and durability of diesel.

Literature

1. Copyright certificate of the USSR No. 1728290, C10L 1/32, 1989

2. RF patent №2221839, 2004 - prototype.

3. Arkhangelskaya, V. M., etc. in Automobile engines. Under. edited by M. S. Hoveka. M.: Mashinostroenie, 1977. - 591 p., ill.

Fuel emulsion for diesel engines based on diesel fuel with addition of alcohol, an emulsifier, a mixture of Soaps of diethanolamine and oleic acid and water, characterized in that it further comprises a lubricity additive ADP-Lubricon in the following ratio of components, %: ethanol 5,0-50,0; water 0,5-5,0; alkenylamine 0,25-1,0; the mixture was washed diethanolamine and oleic acid 0.2; the lubricating additive of 0.02; diesel fuel - up to 100.



 

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