KR20170086398A - Catalyst composition for internal combustion - Google Patents

Abstract

The present invention relates to a catalyst composition for an internal combustion engine, comprising 2-ethylhexyl acetate, a metal nitrate salt compound and an alkene compound in a specific ratio to increase the ignitability of combustion to increase fuel efficiency and thereby reduce soot of exhaust gas.

Description

Catalyst composition for internal combustion engine {CATALYST COMPOSITION FOR INTERNAL COMBUSTION}

The present invention relates to a catalyst composition for an internal combustion engine, and more particularly, to a catalyst composition for an internal combustion engine, which comprises 2-ethylhexyl acetate, a metal nitrate salt compound and an alkene compound as a complexing agent, To a catalyst composition for an internal combustion engine that reduces soot of exhaust gas.

The environment in which human beings live in a rapidly changing industrial environment is becoming increasingly devastating. Especially pollution by automobile exhaust gas is recognized as one of the serious social problems that are seeking solutions around the world. In 2010, 3.2 million people died from air pollution worldwide, more than four times more than 800,000 people in 2000. According to Guardian, 2.1 million deaths in Asia as of 2010 are directly related to air pollution. The main cause of air pollution is automobile exhaust gas including diesel car exhaust and automobile exhaust gas Is a global trend, beginning in the 1970s in the US and Canada.

As environmental pollution and depletion of resources have come to the fore, there has been a continuing development of a fuel economy improving agent such as a soot reducing agent or a soot reducing agent. For example, U.S. Patent Application Publication No. 2006/0201056 discloses a technology including a fuel additive for biodiesel fuel including an aliphatic nitrate. However, the aliphatic nitrate compound has a high cetane number, but is toxic and stable There is a problem that it is not ensured and causes an environmental problem. In addition, recently developed soot reducing compositions also have a reduction degree of soot of 30 to 40% and a fuel economy improvement effect of only 5 to 10%. Development of a fuel efficiency improvement vehicle has been made, but development of a composition having an excellent effect of reducing the smoke is urgent because environmental pollution and resource depletion progress speed is remarkably fast.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an internal combustion engine capable of preventing oil film formation between a cylinder head, a silyling, and a cylinder wall generated in a cylinder mixer of an internal combustion engine, , Intake valves and intake manifolds while maintaining the cylinders of the internal combustion engine clean, as well as inducing redox reactions of harmful substances generated in the internal combustion engine, realizing combustion close to complete combustion, And which has an effect of improving the fuel efficiency and thus significantly reducing the soot of the exhaust gas.

In order to achieve the above object, the catalyst composition for internal combustion engines according to the present invention comprises 1 to 70 parts by weight of a metal nitrate compound and 1 to 70 parts by weight of an alkene compound per 100 parts by weight of 2-ethylhexyl acetate .

In the catalyst composition for an internal combustion engine according to the present invention, the metal nitrate salt compound may be at least one selected from silver nitrate, potassium nitrate, barium nitrate, zinc nitrate, aluminum nitrate, magnesium nitrate and manganese nitrate.

In the catalyst composition for an internal combustion engine according to the present invention, the alkene compound may be at least one selected from butane, isopropylene and isobutylene.

The catalyst composition for an internal combustion engine according to the present invention may further include at least one of an oxidation-reduction reaction promoter, a detergent, a dispersant, an abrasion inhibitor and a lubricant.

In the catalyst composition for an internal combustion engine according to the present invention, the redox reaction promoter may be at least one metal selected from platinum, palladium, rhodium, cerium, lanthanum, organogermanium, titanium, silicon, tin, manganese, Metal compound.

In the catalyst composition for an internal combustion engine according to the present invention, the detergent may be at least one selected from a polybutenylcyclohexanimide compound, a polybutenylamine compound, a surfactant, a polyolefin, a polyamine and a succinimide.

In the catalyst composition for an internal combustion engine according to the present invention, the dispersant may be at least one selected from barium, magnesium, calcium and boron.

In the catalyst composition for an internal combustion engine according to the present invention, the abrasion preventing agent may be at least one selected from phosphorus, zinc, molybdenum disulfide, ethylene propylene copolymer and styrene maleate ester copolymer.

In the catalyst composition for an internal combustion engine according to the present invention, the lubricant may be at least one selected from an ethylene-vinyl acetate copolymer, a surfactant, stearic acid, and polyisobutene.

According to the catalyst composition for an internal combustion engine according to the present invention, it is possible to prevent the formation of an oil film between the cylinder head, the silylation and the cylinder wall, which occurs in the cylinder mixer of the internal combustion engine, So that the cylinder of the internal combustion engine is cleanly maintained, the harmful substances are rapidly oxidized and reduced, and the ignitability of the combustion is excellent, so that the combustion process is smoothly performed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram schematically illustrating a flow of a change in combustion-treated components of an internal combustion engine equipped with a catalyst composition according to an embodiment of the present invention. Fig.
FIG. 2 shows the contamination state of the intake manifold using fuel using the catalyst compositions of Comparative Examples 1 and 2 and Examples 1 and 2. FIG.
3 shows the atomization of the intake system of the fuel using the catalyst compositions of Comparative Example 1 and Example 1. Fig.
Fig. 4 shows the carbon contamination state of the fuel in the combustion chamber using the catalyst composition of Comparative Example 1 and Example 1. Fig.
5 shows the soot measurement result according to the metal nitrate content ratio.
Fig. 6 shows the result of soot measurement according to the content of the alkene compound.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, the catalyst composition for an internal combustion engine according to the present invention will be described in detail.

Highly ignitable fuels can increase the output and fuel economy of the vehicle with increased burning, increased startability at low temperatures, reduced particulate matter (PM), and reduced nitrogen oxide (NO _x ) emissions. In the present invention, a catalyst composition serving as a catalyst for such a fuel has been completed.

More specifically, the catalyst composition for an internal combustion engine according to the present invention is characterized in that the fuel for internal combustion engine made of gasoline, light oil or LPG has excellent ignitability in combustion in the engine, and the hydrocarbon (HC), carbon monoxide Nitrogen oxides (NO _x ), and other harmful gases.

The catalyst composition for an internal combustion engine according to the present invention is characterized by containing 1 to 70 parts by weight of a metal nitrate compound and 1 to 70 parts by weight of an alkene compound based on 100 parts by weight of 2-ethylhexyl acetate as an ignitability improver.

The 2-ethylhexyl acetate decomposes in the combustion of fuel to generate free radicals to prevent ignition delay and to facilitate start-up of the engine. The fuel is efficiently ignited in the engine, And accordingly, it reduces the exhaust gas of course.

The metal nitrate is inexpensive and industrially readily available, does not require special reaction equipment, can produce metal nitrate under reaction conditions that can be easily controlled, and has high thermal stability, For example, 10 to 10 years), even when left in a high-temperature atmosphere, deterioration such as decomposition does not occur.

The metal nitrate salt compound may be at least one selected from silver nitrate, potassium nitrate, barium nitrate, zinc nitrate, aluminum nitrate, magnesium nitrate, and manganese nitrate.

The alkene compound is excellent in burnability, is rich in hard component and wax, and has a small specific gravity. The type of the alkene compound is not particularly limited and may be at least one selected from butane, isopropylene, and isobutylene.

The content of the catalyst composition for an internal combustion engine according to the present invention is preferably 1 to 70 parts by weight of a metal nitrate compound and 1 to 70 parts by weight of an alkene compound, It is preferable that the amount of the metal nitrate compound is less than 1 part by weight because the ability to oxidize and reduce the harmful substance is poor. If the amount of the metal nitrate compound is more than 70 parts by weight, If the amount of the alkene compound is less than 1 part by weight, the engine explosive force is low. If the amount of the alkene compound exceeds 70 parts by weight, the knocking phenomenon occurs excessively, which may adversely affect the internal combustion engine.

When the content of the metal nitrate compound is less than 1 part by weight or more than 70 parts by weight, the amount of the soot discharged is low because the amount of the soot reduction is small and the content of the alkene compound is less than 1 part by weight or more than 70 parts by weight It is not preferable because the amount of soot discharged is small because the amount of soot reduction is small. If the content of the metal nitrate or alkene compound is less than 1 part by weight, the effect of reducing the exhaust gas is undesirable, and if it exceeds 70 parts by weight, the metal nitrate or alkene compound is not diluted and separated, It is not desirable because it does not affect.

The catalyst composition for an internal combustion engine according to the present invention may further include at least one of an oxidation-reduction reaction promoter, a detergent, a dispersant, an abrasion inhibitor and a lubricant.

The oxidation-reduction promoter is a compound that prevents the temperature rise and the high viscosity and restoration function of the cylinder due to excessive air control and the gaps of the oil film cylinder of the piston. It reduces the NO _x to convert it into nitrogen and oxygen. Oxygen reacts with CO to become CO _2. It can selectively reduce NO _x without being disturbed by O ₂ , and the NO _x removal rate is very high.

That is, the redox reaction promoter is a compound that causes rapid oxidation and reduction reaction of harmful substances discharged from the internal combustion engine. The redox reaction promoter is not particularly limited, and examples thereof include platinum, palladium, rhodium, cerium, At least one metal or metal compound selected from lanthanum, organic germanium, titanium, silicon, tin, manganese, nickel and silver.

The platinum, palladium and rhodium can be used as a catalyst composition, but it is possible to remarkably increase the efficiency of the catalyst in an ionic state by using a compound in the form of coupling with chlorine, And the form of the compound in which the platinum, palladium and rhodium are combined with chlorine may be platinum chloride, palladium chloride, and rhodium chloride. Particularly, when platinum chloride is strongly acidic and diluted with distilled water, the ionization can proceed rapidly to neutral, and it is preferable that platinum chloride, palladium chloride, and rhodium chloride are in the form of hexahydrate, and specifically, platinum chloride hexahydrate H ₂ PtCl ₂ 6H ₂ O), palladium chloride hexahydrate (PdCl ₂ 6H ₂ O) or rhodium chloride hexahydrate (RhCl ₃ 6H ₂ O). In the case of hexavalent form, the time required for ionization in diluting the distilled water is short, which is effective to function as a catalyst.

The cerium and lanthanum may be used as the metal itself, but may also be used in the form of cerium oxide and lanthanum oxide. The cerium and lanthanum are excellent in oxygen adsorption and release ability, and are excellent in redox power against harmful substances such as hydrocarbons, carbon monoxide, and nitrogen oxides, so that the activity of the ignition improver can be further increased.

The organic germanium is preferably represented by the formula (GeCH ₂ CH ₂ COOH) ₂ O ₃ , and the purity of germanium is preferably 40 to 48%, and particularly 42.8% is most effective, but is not limited thereto. The organic germanium is water-soluble and generates a large amount of anions to neutralize the cations to prevent oxidization and to supply oxygen. In addition, organic germanium emits light when it is energized by radiation, so it acts to further strengthen the strong oxidizing power.

The catalyst composition for an internal combustion engine according to the present invention may further contain a detergent if necessary in order to suppress or remove deposits in the injection nozzle and to prevent adhesion and precipitation of gum components and unburnt carbon by a vaporizer intake valve, an injector and the like. When the detergent is added, it is preferably added after the addition of the lubricant or simultaneously with the lubricant. The detergent is not particularly limited and may be, for example, at least one selected from a polybutenylamine-based compound, a surfactant, a polyolefin, a polyamine and a succinimide.

In the catalyst composition for an internal combustion engine according to the present invention, the dispersant disperses insoluble materials contained in the unburned carbide and the lubricating oil to prevent aggregation of contaminants such as sludge in the engine, neutralizes acidic substances, The dispersant is not particularly limited and may be at least one selected from barium, magnesium, calcium and boron.

In the catalyst composition for an internal combustion engine according to the present invention, the abrasion preventing agent is used for inhibiting metal corrosion and oxidation softening caused by moisture and for preventing the formation of a gauze material, and also chemically reacting with the metal surface to form a protective film So that the movable parts can slide relative to each other, thereby minimizing wear.

The abrasion preventing agent is not particularly limited and may be, for example, at least one selected from phosphorus, zinc and molybdenum disulfide, ethylene propylene copolymer and styrene maleic ester copolymer.

In the catalyst composition for an internal combustion engine according to the present invention, the lubricant may be at least one selected from an ethylene-vinyl acetate copolymer, a surfactant, stearic acid, and polyisobutene.

In the catalyst composition for an internal combustion engine according to the present invention, the content of the oxidation-reduction reaction promoter, the detergent, the dispersant, the abrasion inhibitor and the lubricant may be conventionally used in the art, The content of the detergent is preferably in the range of 1 to 150 parts by weight based on 100 parts by weight of the catalyst composition, If the amount is too large, it is not possible to expect an effect corresponding thereto. On the contrary, there is a fear that NO _x , PM, and aldehydes in the engine exhaust gas may increase, which is not preferable , The content of the dispersing agent is 0.1 to 50 parts by weight based on 100 parts by weight of the catalyst composition If the amount of the anti-wear agent is less than the above range, it is not preferable because the non-brittle compound and the insoluble materials contained in the lubricant can not be dispersed properly. The content of the abrasion inhibitor is preferably 1 to 200 parts by weight per 100 parts by weight of the catalyst composition If the amount of the lubricant is out of the above range, metal corrosion becomes easy, oxidation deterioration can not be suppressed, and there is a problem of generation of a gauze material. The content of the lubricant is preferably 0.1 to 80 parts by weight per 100 parts by weight of the catalyst composition However, if it is outside the above range, the flowability of the fuel may be lowered and the fuel may be reduced to low sulfurization.

[Example]

Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited to these examples.

Example 1

8 parts by weight of zinc nitrate and 50 parts by weight of isopropylene were mixed with 100 parts by weight of ethyl acetate to prepare a catalyst composition. To 100 parts by weight of the catalyst composition, 6 parts by weight of lanthanum as an additive, 3 parts by weight of polybutenyl cyclohexaneimide , 5 parts by weight of barium, 10 parts by weight of phosphorus and 5 parts by weight of polyisobutene, respectively, in distilled water were mixed to prepare a liquid catalyst composition. The manufactured catalyst composition was mounted on the engine, and the content of the discharged material was measured after the speed of the vehicle was gradually increased to 150 km / h. At that time, the vehicle used was a 2006 Starex ambulance vehicle, using diesel as the fuel, the cumulative running distance was 135,753 Km, and the displacement amount was 2,497 cc. Results and test methods of each material were measured by ASM idling.

Example 2

8 parts by weight of zinc nitrate and 50 parts by weight of isopropylene were mixed with 100 parts by weight of 2-ethylhexyl acetate to prepare a catalyst composition. To 100 parts by weight of the catalyst composition, 6 parts by weight of lanthanum, , 1 part by weight of polyamine, 5 parts by weight of barium, 10 parts by weight of phosphorus and 5 parts by weight of polyisobutene, respectively, in distilled water were mixed to prepare a liquid catalyst composition. A vehicle having the same conditions as in Example 1 was used to measure the content of the discharged material after the manufactured catalyst composition was mounted on the engine and the running speed of the vehicle was gradually increased to 150 km / h.

Example 3

8 parts by weight of manganese nitrate and 50 parts by weight of isopropylene were mixed with 100 parts by weight of 2-ethylhexyl acetate to prepare a catalyst composition. To 100 parts by weight of the catalyst composition, 6 parts by weight of lanthanum as an additive, 3 parts by weight of imide, 5 parts by weight of barium, 10 parts by weight of phosphorus and 5 parts by weight of polyisobutene supported on distilled water were mixed to prepare a liquid catalyst composition. The manufactured catalyst composition was mounted on the engine, and the content of the discharged material was measured after the speed of the vehicle was gradually increased to 150 km / h. At this time, the vehicle used was a 1997 Sonata III 1.8 vehicle, and gasoline (gasoline) was used as fuel, the cumulative running distance was 171,274 Km, and the displacement amount was 1,796 cc. Results and test methods of each material were measured by ASM idling.

Comparative Example 1

The content of the discharged material was measured after the vehicle was operated while gradually increasing the speed to 150 km / h by using a vehicle having the same condition as in Example 1, except that the catalyst composition was not mounted.

Comparative Example 2

8 parts by weight of zinc nitrate and 50 parts by weight of isopropylene were mixed with 100 parts by weight of 2-ethylhexyl nitrate to prepare a catalyst composition. To 100 parts by weight of the catalyst composition, 6 parts by weight of lanthanum as an additive, 3 parts by weight of hexane imide, 5 parts by weight of barium, 10 parts by weight of phosphorus and 5 parts by weight of polyisobutene, respectively, in distilled water were mixed to prepare a liquid catalyst composition. A vehicle having the same conditions as in Example 1 was used to measure the content of the discharged material after the manufactured catalyst composition was mounted on the engine and the running speed of the vehicle was gradually increased to 150 km / h.

CO (%) ¹⁾ HC (ppm) ²⁾ NO _x (ppm) ³⁾ Air excess rate (%) ⁴⁾ Example 1 1.02 / 0.9 147/207 277 0.97 Example 2 1.01 / 0.9 150/208 305 0.97 Example 3 1.01 / 0.8 132/197 257 0.99 Comparative Example 1 2.32 / 2.4 257/462 2,045 0.91 Comparative Example 2 1.5 / 1.3 211/358 1,791 0.93

Note 1) Carbon monoxide concentration emission allowance is 1.21 / 1.2% or less.

2) Hydrocarbon concentration The allowable discharge standard is 190 / 220ppm or less.

3) Nitrogen oxide concentration emission limit is less than 1,310ppm.

4) The permissible air excess rate is 0.90 ~ 1.10.

In Table 1, the contents of carbon monoxide in Examples 1 to 3 were 1.02 / 0.9%, 1.01 / 0.9% and 1.01 / 0.8%, respectively, Are respectively 2.32 / 2.4% and 1.5 / 1.3%, respectively,

In addition, the hydrocarbons of Examples 1 to 3 were 147 / 207ppm, 150 / 208ppm and 132 / 197ppm, respectively, which were lower than the hydrocarbon concentration discharge allowance level, while Comparative Examples 1 and 2 were 257/462 ppm and 211/358 ppm, It can be seen that the concentration discharge allowance is exceeded,

Examples 1 to 3 In the case of the NO _X, in the case was due to the strong oxidizing capability of the catalyst composition reduced to nitrogen gas, while the value is as 277ppm, 305ppm and 257ppm much reduced than the discharge limit of the NO _X, Comparative Examples 1 and 2 It is confirmed that the nitrogen oxides are emitted at a rate of 2,045 ppm and 1,791 ppm, which is the allowable standard of nitrogen oxides, of 1,310 ppm, as well as about 6 to 7 times that of the first embodiment.

Experimental Example 1: Pollution degree of suction manifold

Fig. 2 shows the contamination state of the intake manifold using fuel using the catalyst compositions of Comparative Examples 1 to 3 and Examples 1 and 2. Examples 1 to 3 show that the pollutants are cleaned and pollutants are adhered to the intake manifold However, in Comparative Example 1, the degree of contamination was extremely high. In Comparative Example 2, it was found that the amount of contaminants was less than that of Comparative Example 1.

Experimental Example 2: Pollution degree of intake system

FIG. 3 shows the atomization state of the intake system of the fuel using the catalyst composition of Comparative Example 1 and Example 1. In the case of Comparative Example 1, since the impurities of the intake system and the carbon contaminant accumulated by the incomplete combustion, On the other hand, in the case of Example 1, the carbon contamination accumulated by the impurities in the intake system and the incomplete combustion is cleanly removed by the chemical reaction, so that the efficiency increase and the soot by complete combustion are reduced.

That is, substances such as carbon and sludge of engine oil are deposited around the intake valve to obstruct the fuel atomization. If the fuel particles are uneven, fuel particles become large, and the flame propagation speed is retarded to incomplete combustion, and generation of hydrocarbon and carbon monoxide The cylinder durability of the engine is also lowered.

Experimental Example 3: Pollution degree of the combustion chamber

FIG. 4 shows the state of contamination due to carbon in the combustion chamber using the fuel using the catalyst composition of Comparative Example 1 and Example 1. FIG. 4 shows the combustion chamber in a state contaminated with carbon in the case of Comparative Example 1, 1 shows the combustion chamber in which the carbon is inhibited and removed so that the nozzle is not clogged. The supplied fuel particles are uniformly sprayed in the atomized (mist) state and sprayed, so that the flame propagation speed is fast and complete combustion is performed, The exhaust gas concentration was lowered.

Experimental Example 4: Comprehensive Test Results

(Gasoline or LPG) containing the catalyst composition of Example 1 was installed in a small, medium, and large-sized vehicle and a certain distance (100 to 300 km) was traveled, (Exhaust emissions), output, and fuel consumption, the emission of carbon (smoke) was reduced by an average of 36.5% in each of the automobile types, and 19.7% in the case of Example 1 as compared with Comparative Example 1 in which the catalyst composition was not used Fuel efficiency improvement, 14.7% output synergistic effect, and the results are shown in Table 2 below.

vehicle
(type) Quantity
(versus) Average
Year  fuel Fuel saving rate
(Average:%) Gas emissions (average) (carbon, soot) Large bus 7 8.2 Diesel 19.31 - 25% lower than smoke allowance standards
- 14.7% improvement in output (ps) truck
(25t ↑) 19 5.1 17.45 Medium and small trucks 8 8.6 17.66 gasoline
vehicle 12 5.9 gasoline 24.37 · 15.7% reduction compared to carbon monoxide (CO) limit
· 22.63% reduction in hydrocarbons (HC)
· Reduction of nitrogen oxide (NOX) by 82.67% LPG vehicle 12 4.9 LPG 19.59

Experimental Example  5

The following experiment was conducted using the fuel containing the catalyst composition of Example 1.

1) Exhaust gas measurement

As a result of analyzing the data of the diesel vehicle, the reference value of the exhaust gas emission amount was 25%. When the fuel using the catalyst composition of Example 1 was used, the measured exhaust gas emission amount was reduced to 5%.

2) Stability test

As a result of a test to find that the air ratio was changed at a constant pressure by changing the capacity of the fuel containing the catalyst composition of Example 1 and that the mixture was cleaned in a proper amount, the combustion rate was 20 to 150 km per hour, And it was confirmed to be very stable.

3) Noise measurement

Noise was measured using direct hearing. After turning on the test results and starting the vehicle, the vibration and noise were reduced, and even when accelerated to over 150km / h, the vibration and noise became more calm there was.

Experimental Example  6: Measurement of soot reduction by metal nitrate content

50 parts by weight of isopropylene and zinc nitrate were mixed with 100 parts by weight of 2-ethylhexyl acetate to prepare a catalyst composition. To measure the amount of soot loss according to the amount of metal nitrate, zinc nitrate was mixed with 0.1, 0.5, 1, 20, 40, 55, 70, 80, 95 parts by weight in 100 parts by weight of 2-ethylhexyl acetate To prepare a catalyst composition. 6 parts by weight of lanthanum, 3 parts by weight of polybutenylamine, 1 part by weight of polyamine, 5 parts by weight of barium, 10 parts by weight of phosphorus and 5 parts by weight of polyisobutene were added to 100 parts by weight of the catalyst composition, Were mixed to prepare a liquid catalyst composition. A vehicle having the same conditions as in Example 1 was used to measure the content of the discharged material after the manufactured catalyst composition was mounted on the engine and the running speed of the vehicle was gradually increased to 150 km / h.

As a result, it was confirmed that when the zinc nitrate is mixed with 1 to 70 parts by weight, the amount of the soot discharge is remarkably reduced (FIG. 5).

Experimental Example  7: Alkane  Measurement of the amount of soot reduction according to the content of the compound

8 parts by weight of zinc nitrate and isopropylene were mixed with 100 parts by weight of 2-ethylhexyl acetate to prepare a catalyst composition. In order to measure the amount of soot loss according to the alkene compound content, isopropylene was added to 100 parts by weight of 2-ethylhexyl acetate at 0.1, 0.5, 1, 20, 30, 50, 70, To prepare a catalyst composition. 6 parts by weight of lanthanum, 3 parts by weight of polybutenylamine, 1 part by weight of polyamine, 5 parts by weight of barium, 10 parts by weight of phosphorus and 5 parts by weight of polyisobutene were added to 100 parts by weight of the catalyst composition, Were mixed to prepare a liquid catalyst composition. A vehicle having the same conditions as in Example 1 was used to measure the content of the discharged material after the manufactured catalyst composition was mounted on the engine and the running speed of the vehicle was gradually increased to 150 km / h.

As a result, it was confirmed that when 1 to 70 parts by weight of isopropylene was mixed, the amount of the soot discharge was remarkably reduced (FIG. 6).

Claims (9)

1 to 70 parts by weight of a metal nitrate compound and 1 to 70 parts by weight of an alkene compound based on 100 parts by weight of 2-ethylhexyl acetate as an ignition improver.
The method according to claim 1,
Wherein the metal nitrate compound is at least one selected from silver nitrate, potassium nitrate, barium nitrate, zinc nitrate, aluminum nitrate, magnesium nitrate, and manganese nitrate.
The method according to claim 1,
Wherein the alkene compound is at least one selected from butane, isopropylene, and isobutylene. The method according to claim 1,
Wherein the catalyst composition further comprises at least one of a redox reaction promoter, a detergent, a dispersant, an abrasion inhibitor, and a lubricant. 5. The method of claim 4,
Wherein the redox reaction promoter is a compound of at least one metal selected from platinum, palladium, rhodium, cerium, lanthanum, organogermanium, titanium, silicon, tin, manganese, nickel and silver.
5. The method of claim 4,
Wherein the detergent is at least one selected from polybutenylcyclohexanimide compounds, polybutenylamine compounds, surfactants, polyolefins, polyamines, and succinimides.
5. The method of claim 4,
Wherein the dispersant is at least one selected from barium, magnesium, calcium and boron.
5. The method of claim 4,
Wherein the abrasion preventing agent is at least one selected from phosphorus, zinc and molybdenum disulfide, ethylene propylene copolymer and styrene maleate ester copolymer.
5. The method of claim 4,
Wherein the lubricant is at least one selected from ethylene-vinyl acetate copolymer, surfactant, stearic acid, and polyisobutene.

Images