JPS59217795A - Preparation of diesel fuel consisting essentially of mixture of lower alcohol and carbon - Google Patents

Abstract

PURPOSE:To obtain a large amount of heavy oil A substitute oil inexpensively, by adding a specific amount of a lower alcohol or a hydrocarbon to carbon impregnated with a cetane-number improver, pulverizing the blend into tight colloidal diesel fuel. CONSTITUTION:(A) Carbon such as petroleum coke, deashed coal coke, charcoal, etc. is impregnated with (B) fuel having high cetane number or a cetane-number improver such as Cetanox-175, etc. The carbon is blended with (C) >=30wt% lower alcohol such as methanol, ethanol, etc. or hydrocarbon, and pulverized into <=100mu, to give tight colloidal diesel fuel.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing diesel fuel mainly consisting of a mixture of lower alcohol and carbon.

The flour return machine was researched in Germany about 100 years ago and was registered as German Patent No. M11002.

In Japan, starting around 1932, the Fuel Research Institute of the Ministry of Commerce and Industry at the time prototyped a 30-horsepower single-cylinder repulverized diesel engine, and successfully operated it continuously for long periods of time using coal of less than 250 METSI as fuel ( Fuel Association Journal Vol. 22 No. 2
54, pp. 885-886). The reason why these recycled powder diesel engines have not been put into practical use is that they have the following drawbacks.

(1) It is difficult to introduce the returned powder into the combustion chamber.

(2) It is difficult to quickly and completely burn the returned powder.

(8) Wear of mechanical parts and contamination of lubricating oil due to ash content.

This invention uses carbon such as petroleum coke (ash content less than 0.1 inch) with a low ash content as the main raw material instead of coal with a high ash content, and adds a lower alcohol to this to turn solid fuel into a fluid. By further adding a combustion improver to the carbon, the above-mentioned conventional drawbacks are solved.

Examples of the present invention will be described below. Add cetane improver such as Cetanonox-175 to carbon such as petroleum coke, deashed coal coke, charcoal, etc. in liquid form at a weight ratio of approximately 20
The carbon is absorbed and impregnated into the voids of the carbon. More than 30% methanol by weight is added to the carbon impregnated with a cetane improver to give it fluidity, and the carbon is pulverized to 100 microns or less using a pulverizer to obtain a dense colloidal diesel fuel. It is something.

Generally, even if a liquid of about 20 degrees is added to powder, it will be absorbed by the powder and will not become fluid. In the case of coal, if the powder is larger than 100 meshes, it is said to be fluidizable. Coke powder is that! In trenches, lower alcohols are absorbed into the porous powder and have lower fluidity than coal. Therefore, by filling the voids in the powder with a cetane number improver such as Cetanonox-175 in advance, absorption of lower alcohols into the powder voids is prevented, and by adding 30% methanol to the carbon content, fluidization becomes possible. Fuel feed control becomes as easy as liquid fuel.

The cetane number of lower alcohols is very low, ranging from 3 to 8, making them unsuitable for use as diesel fuel. Even if 20 parts of the Cetanox-175 in full liquid form is added to this lower alcohol, the cetane number is only 35. On the other hand, in this invention, a high cetane number fuel with a boiling point of 300 degrees Celsius or less or a cetane number improver such as Cetanonox-175 is absorbed into the voids in the powder as a combustion improver in carbon of 100 microns or less. When injected, these combustion improvers rapidly evaporate and expand to explode the crab granules, and the combustion improvers become the ignition source, transmitting flame from the carbon fine powder to the methanol molecules.

In this way, it is possible to accelerate the ignition of methanol with a small amount of combustion improver.

Figure 1 shows the combustion situation when the co-firing ratio is coke/oil - 8/2 (Pe)otic, Vol. 6, No. 5, 19
83, p. 417). Flame diameter curve 2 with combustion amount 1 on the horizontal axis
, 3 and flame length curves 4 and 5 indicate that the burning rate is fast. As mentioned above, the situation in which the heavy oil absorbed in the voids inside the coke vaporizes and causes the coke to explode and burn is demonstrated.

Furthermore, regarding the effect of ash content, according to the above-mentioned magazine of the Nenshi Association, it states that it is possible to operate with coal with an ash content of 15 inches. In the case of this invention, petroleum coke, charcoal, etc. have an ash content of 0.1% or less, and since a lower alcohol of 30% or more by weight is added thereto, the ash content is not much different from C heavy oil.

As described above, according to the present invention, diesel fuel is manufactured from petroleum coke, which is produced in large quantities during the process of lightening heavy crude oil, and methanol, which will be produced in large quantities from associated natural gas worldwide in the future, and It can provide an alternative fuel to heavy oil in large quantities at low cost, and has the effect of greatly contributing to energy supply.

[Brief explanation of drawings]

FIG. 1 is a graph showing the combustion status of co-combustion of coke and oil and exclusive combustion of oil. l... Burning amount, 2, 3... Flame night song °
Line, 4, 5...flame length curve. Patent applicant: Japan Development Consultants Co., Ltd.
f! f Procedural amendment dated March 3, 1982 2. Name of the invention 3. Relationship with the case of the person making the amendment Patent applicant address 550 (Yasuda Building) Name Nippon Development Consultant Co., Ltd., of the patent application subject to the amendment Title of the invention, title of the invention in the specification, claims and detailed description of the invention in each column 7, contents of amendment (1) Title of the invention in the patent application “Mainly composed of a mixture of lower alcohol and carbon ``Diesel manufacturing method'' is corrected. (2) Page 1, line 3 of the specification, [Alcohol and carbon]
Wow, correct it to "alcohol, etc. and carbon." (3) On page 1, line 16, "alcohol and carbon" is corrected to "alcohol, etc. and carbon." (4) On page 2, line 14, "lower alcohol" is changed to "
"Lower alcohol, etc.," he corrected. (6) On page 3, line 11, ``ru is porous'' is corrected to ``ru or hydrocarbons are porous.'' (7) Page 3, line 14, “alcohol powder”
[Correction: [Alcohol or hydrocarbon powder] (81, page 4, line 8, "methanol molecule" is corrected to "methanol or hydrocarbon molecules". (9) page 5, line 11, "by methanol" is changed to "
"by low cetane number hydrocarbons such as methanol or cracked heavy oil." (10) Amend the claims as shown in the attached sheet. A document stating the scope of claims above.Claims for petroleum coke, deashed coal coke, charcoal, etc.7
K. Evenly impregnated with a high cetane number fuel or a cetane number improver such as Cetanonox-175, and added with a lower alcohol such as methanol or ethanol or hydrocarbons in a weight ratio of 80% or more to the carbon impregnated with the cetane number improver. A method for producing diesel fuel mainly consisting of a mixture of lower alcohol, etc. and carbon, which is characterized by pulverizing the added material to 100 microns or less to form a tightly colloidal diesel fuel.

Claims (1)

[Claims] A cajon such as petroleum coke, deashed coal coke, or charcoal is evenly impregnated with a high cetane number fuel or a cetane number improver such as Cetanonox-175, and the cetane number improver is added to the impregnated carbon at a weight ratio of 30 or more. 100 with lower alcohol such as methanol or ethanol added
A method for producing diesel fuel mainly consisting of a mixture of lower alcohol and carbon, which is characterized by pulverizing it to a size smaller than a micron to form a tightly colloidal diesel fuel.