JPH0832898B2 - Particulate burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a particulate burner. More specifically, black soot (called particulates) generated by a diesel internal combustion engine is collected on a ceramic filter, and if necessary, an ignition source is used to reduce the ignition temperature for combustion and removal on the filter. The present invention relates to a combustion improver and can be used by adding it to diesel fuel oil.

[Prior Art] Conventionally, it is known to add an oil-soluble alkali metal or an alkaline earth metal such as Ca or Ba to a diesel fuel oil as a combustion improver for reducing black smoke generated from a diesel internal combustion engine ( For example, Japanese Patent Publication Nos. 41-17218 and 41-20550).

It is also known to use an oil-soluble Mn or Fe-containing compound as a combustion improver [SAE Paper 870017].

[Problems to be Solved by the Invention] However, the former is intended to reduce the amount of particulates per se, and is not effective as a combustion improver for particulates collected by the filter. The latter certainly lowers the ignition temperature with these compounds, but is still not sufficient.

As described above, in the conventional technique, the ignition temperature of the particulates on the filter is high, and a large amount of energy is required to burn and remove the particulates.

[Means for Solving Problems] The present inventors have arrived at the present invention as a result of extensive studies on a combustion improver that lowers the ignition temperature of particulates collected on a filter.

That is, the present invention comprises an oil-soluble compound (A) containing Mn and / or Fe and an oil-soluble compound (B) containing K, and Mn and / or Fe in (A) and K in (B).
Is a particulate burner having a weight ratio of 1: 0.1 to 10.

In the present invention, the oil-soluble compound (A) containing Mn and / or Fe includes Mn salt and / or Fe salt of oil-soluble acids.

As the oil-soluble acids, carboxylic acids (usually having 8 or more carbon atoms, such as octylic acid, pelargonic acid, lauric acid, myristic acid, palmitic acid, behenic acid, oleic acid, linoleic acid and naphthenic acid), sulfonic acid ( Mono- or di-alkylbenzenesulfonic acid having an alkyl group having usually 8 or more carbon atoms, mono-, di- or trialkylnaphthalene sulfonic acid having an alkyl group having usually 8 or more carbon atoms, petroleum sulfonate, etc., phenolic acid (carbon number) Are usually mono or dialkylphenols containing 8 or more alkyl groups) and the like.

Among the Mn salt and the Fe salt, the Fe salt is preferable from the viewpoint of the ignition temperature.

Examples of the oil-soluble compound (A) containing Mn and / or Fe include naphthenic acid Mn salt, octylic acid Fe salt, and dialkylbenzenesulfonic acid Fe salt.

Examples of the oil-soluble compound (B) containing K include K salts of oil-soluble acids.

Examples of the oil-soluble acids include the same as the oil-soluble acids described in the section (A).

Examples of the oil-soluble compound (B) containing K include potassium oleate and potassium dodecylbenzene sulfonate.

In (A) and (B), the weight ratio of Mn and / or Fe in (A) and k in (B) is 1: 0.1 to 10, preferably
1: 1 to 10. If the range of K is larger or smaller than the range of 0.1 to 10, the ignition temperature of particulates becomes high.

The oil-soluble compound (A) containing Mn and / or Fe and the oil-soluble compound (B) containing K in the present invention can be obtained by various methods. Examples include Mn, Fe, K oxides and hydroxides, using oil-soluble acids to form salts thereof, and solubilizing a large amount of Mn, Fe, K in the form of carbonates. To be

In the case of simply forming a salt, it can be obtained by a simple (heating) neutralization reaction with the above-mentioned acids, or in some cases, it can be obtained by adding manganese acetate or iron acetate to alkaline soapy water of the acids to cause metathesis precipitation.

In the case of solubilizing a large amount in the form of carbonate, conventionally known methods for solubilizing Ca, Mg, Ba and the like (JP-A-62-292892, JP-A-62-255497, JP-B-62-42957, It can be easily obtained by a method similar to those of JP-B-51-35202 and JP-B-41-20550). For example, dialkylbenzenesulfonic acid is used as a solubilizer, and Mn, Fe, and K are added in the form of an oxide or a hydroxide in a mixed solvent of xylene, methanol, water, etc., and a small amount of an accelerator such as ammonia is added. And add 30
Carbon dioxide gas is blown in under the temperature condition of ~ 60 ℃, Mn,
Fe and K can be solubilized in the form of carbonate. In the present invention, any of these can be used, but the form of carbonate is preferable because it easily contains metal components (Mn, Fe, K) per unit volume.

The combustion improver of the present invention is added to diesel fuel oil (hereinafter abbreviated as fuel oil) and used. This fuel oil is used for diesel engines among petroleum products, and specifically, kerosene (1,2), light oil (1-3, special 1-special 3) and A
Heavy oil is mentioned.

When the combustion improver of the present invention is contained in fuel oil, the content thereof is usually 1 to 100 ppm, preferably 5 to 50 ppm in terms of metal content in the fuel oil.

The method of incorporating the combustion improver of the present invention into fuel oil is not particularly limited. For example, a method of adding the combustion improver of the present invention to fuel oil as it is, and a method of adding it after diluting it with a solvent such as a fuel oil or an aromatic hydrocarbon solvent are included.

The combustion improver of the present invention may be always added to the fuel oil, or may be added to the fuel oil only when a large amount of particulates are accumulated on the filter.

Various additives used in diesel fuel oil (antioxidant, rust preventive, anticorrosive, fluidity improver, drainer, cetane improver, color stabilizer, detergent, sterilizer) Agent, etc.) may be mixed.

[Examples] Hereinafter, the present invention will be further described with reference to Examples, but the present invention is not limited thereto. In the examples,% is% by weight.

Examples 1 to 7 and Comparative Examples 1 to 3 The combustion improver and comparative product of the present invention are shown below.

Example 1: A mixture of 100 parts manganese naphthenate (Mn content 6%), 47 parts potassium oleate (K content 12.9%) and 93 parts xylene (Mn / K = 50/50 weight ratio).

Example 2: A mixture of 100 parts iron octylate (Fe content 5%), 39 parts potassium oleate (K content 12.9%) and 61 parts xylene (Fe / K = 50/50 weight ratio).

Example 3: 100 parts of iron carbonate solubilized in the form of iron carbonate (Fe content 12%) and potassium dodecylbenzenesulfonate (K content 10.7%) by a conventional method using a dialkylbenzenesulfonic acid having a molecular weight of 340 A mixture of 112 parts and 268 parts of xylene (Fe / K = 50/50 weight ratio).

Example 4: A mixture of 70 parts iron octylate (Fe content 5%), 50 parts potassium oleate (K content 12.9%) and 80 parts xylene (Fe
/ K = 35/65 weight ratio).

Example 5: Mixture of 40 parts iron octylate (Fe content 5%), 62 parts potassium oleate (K content 12.9%) and xylene 98 parts (Fe
/ K = 20/80 weight ratio).

Example 6: A mixture of 130 parts of iron octylate (Fe content 5%), 27 parts of potassium oleate (K content 12.9%) and 43 parts of xylene (Fe / K = 65/35 weight ratio).

Example 7: Mixture of 160 parts iron octylate (Fe content 5%), 16 parts potassium oleate (K content 12.9%) and xylene 24 parts (Fe / K = 80/20 weight ratio).

Comparative Example 1: Mixture of 100 parts manganese naphthenate (Mn content 6%) and 20 parts xylene Comparative Example 2: Iron octylate (Fe content 5%) Comparative Example 3: 100 parts potassium oleate (K content 12.9%) A mixture of 158 parts xylene.

In addition, (Mn or Fe in Examples 1-7 and Comparative Examples 1-2)
And the total content of K) is all 5%.

Test Example 1 0.4 g each of the combustion improver of Examples 1 to 7 and Comparative Examples 1 and 2
Each of them was dissolved in 1 liter of commercially available No. 2 diesel oil and used as a test fuel oil [total amount of metals (Mn, Fe, K) in the test fuel oil was 20 mg /]. With this test fuel oil, a diesel engine was operated for 1 hour at 2000 rpm x 7 kg-m, and particulates were collected by a filter. The ignition temperature of this particulate was measured by differential thermal analysis, and the results shown in Table 1 were obtained.

[Effect of the Invention] The combustion improver of the present invention can significantly lower the ignition temperature of the collected particulates generated from a diesel engine.

Therefore, when burning and removing the particulates, there is an effect that the energy required therefor can be greatly reduced.

When the combustion improver of the present invention is added to diesel fuel oil and a diesel internal combustion engine is operated, Mn, Fe, and K are present in the particulates in the form of sulfates or oxides finely or uniformly. It is presumed that, because of this, it has an excellent effect of supporting combustion. However, if K is used, although the reason is unknown, the combustion-preventing effect is significantly improved.

Claims (3)

[Claims] 1. An oil-soluble compound (A) containing Mn and / or Fe and an oil-soluble compound (B) containing K,
A particulate burner in which the weight ratio of Mn and / or Fe in (A) and K in (B) is 1: 0.1-10. 2. The combustion improver according to claim 1, wherein the weight ratio of Mn and / or Fe in (A) and K in (B) is 1: 1 to 10. 3. The combustion improver according to claim 1, wherein (A) is an oil-soluble compound containing Fe.