KR20200104014A - Gel or solid alcohol fuel composition and method for preparing gel or solid alcohol fuel - Google Patents

Abstract

The present invention relates to a fuel composition for producing a gelled or solidified fuel. More specifically, provided is a gelled alcohol fuel composition which comprises: 10-70 wt% of a polyhydric alcohol calorific increasing agent, 0.1-5 wt% of a cellulose-based thickener, 0.1-90 wt% of a carbonate compound selected from the group consisting of dimethyl carbonate, diethyl carbonate and ethyl dicarbonate, and 5-85 wt% of at least one alcohol of methanol and ethanol.

Description

Gelled or solidified alcohol fuel composition and method for producing gelled or solidified fuel {GEL OR SOLID ALCOHOL FUEL COMPOSITION AND METHOD FOR PREPARING GEL OR SOLID ALCOHOL FUEL}

The present invention relates to a gelled or solidified methyl alcohol fuel composition having excellent calories and a method for producing the methyl alcohol fuel.

As a heating fuel for curing concrete in winter or as a fire igniter in outdoor activities, gelled or solidified alcoholic fuel is used.

A semi-solid gelled fuel made by gelling or solidifying alcohols is a fuel developed in consideration of problems such as low storage stability, low calorific value, and short combustion time occurring in the conventional methyl alcohol fuel. In addition, it is also a fuel manufactured by replacing the solid paraffin-based solid fuel manufactured to replace the conventional methyl alcohol fuel.

The gelled or solidified fuel solves all the problems that occur in the conventional methyl alcohol fuel or solid paraffin-based solid fuel, and does not easily spill because it has caking even if it is spilled, so it can be used more safely. have. In addition, it can be said that it is an advanced fuel compared to the conventionally known methyl alcohol or solid paraffin-based solid fuels in terms of increasing the calorific value during combustion, thereby greatly increasing the combustion time, and enabling direct combustion.

However, in the conventionally provided gelled or solidified fuel, most of the components are composed of alcohol such as methanol or ethanol, and a small amount of carbomer (carbomer) is used as a thickener, and such a gelled or solidified fuel is Since the calorific value is low, there is a demand for the need to increase the calorific value.

On the other hand, the conventional gelling or solidified alcohol fuel requires a process of stirring for a long time after adding a thickener in the gelling process. In particular, carbomer, which is generally used as a thickener, is added to water and used. When the carbomer is added to water, there is a need to heat it in a stirring process. In addition, carbomers are sensitive to pH. Accordingly, a lot of time is required to increase the viscosity, as well as the need to maintain the temperature and pH, which leads to a decrease in productivity in the manufacturing process, and further, increases the cost.

As an embodiment of the present invention, it is intended to provide a gelled or solidified alcohol fuel capable of increasing the amount of heat relative to a conventional gelled or solidified alcohol fuel, thereby increasing fuel combustion time, thereby reducing fuel consumption.

In addition, as an embodiment, an object of the present invention is to provide a gelled or solidified alcohol fuel composition and a method for producing a gelled or solidified alcohol fuel capable of omitting a long stirring process for incremental increase in the production process of gelled or solidified alcohol fuel. .

In one aspect, the present invention provides a gelled or solidified alcohol fuel composition, wherein the gelled or solidified alcohol fuel composition is 10 to 70% by weight of at least one of polyhydric alcohols, and 0.1 to 5% by weight of a cellulose thickener , 0.1 to 90% by weight of a carbonate compound selected from the group consisting of dimethyl carbonate, diethyl carbonate and ethyl dicarbonate; And 20 to 85% by weight of at least one alcohol of methanol and ethanol.

The polyhydric alcohol may be at least one selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, regenerated glycerin, dihydric alcohol and trihydric alcohol.

The cellulose-based thickener may be at least one of hydroxy methyl cellulose, hydroxy ethyl cellulose, and hydroxy propyl methyl cellulose.

The fuel composition may further include 0.1 to 5% by weight of a reaction initiator based on 100% by weight of the total amount of the heat increase agent, cellulose thickener, and alcohol.

The reaction initiator is preferably a strong base such as NaOH or KOH, NaOH dissolved in alcohol.

The fuel composition is at least one selected from the group consisting of hydrated styrene thermoplastic elastomer, potassium carbonate, H ₂ Mg ₃ (SiO ₃ ) ₄ , Mg ₃ Si ₄ O ₁₀ (OH) ₂ , titanium oxide The solidifying agent may further include 1 to 5% by weight based on 100% by weight of the fuel composition.

In another aspect, the present invention provides a method for producing a gelled or solidified alcohol fuel, and the production method of the present invention includes 10 to 70% by weight of a polyhydric alcohol calorific increaser, 0.1 to 5% by weight of a cellulose thickener, dimethyl carbonate, di Forming a fuel composition by mixing 0.1 to 90% by weight of a carbonate compound selected from the group consisting of ethyl carbonate and ethyldicarbonate and 20 to 85% by weight of at least one alcohol of methanol and ethanol, and in 100% by weight of the fuel composition About 0.1 to 5% by weight of at least one reaction initiator of NaOH, KOH, and NaOH dissolved in alcohol is added to gel or solidify.

The gelling or solidification may be performed for 5 to 50 seconds.

The polyhydric alcohol may be at least one selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, regenerated glycerin, dihydric alcohol and trihydric alcohol.

The cellulose-based thickener may be at least one of hydroxy methyl cellulose, hydroxy ethyl cellulose, and hydroxy propyl methyl cellulose.

The gelling or solidifying step is selected from the group consisting of hydrated styrene thermoplastic elastomer, potassium carbonate, H ₂ Mg ₃ (SiO ₃ ) ₄ , Mg ₃ Si ₄ O ₁₀ (OH) ₂ , titanium oxide 1 to 5% by weight of at least one solidifying agent may be further included based on 100% by weight of the fuel composition.

According to the present invention, the calorific value of the gelled or solidified alcohol fuel is high, thereby increasing the combustion time, and as a result, it is possible to reduce the amount of methyl alcohol fuel, which is a toxic substance mainly used.

The gelled or solidified alcohol fuel composition of the present invention can gel or solidify in a short time, providing an effect of shortening the fuel manufacturing time, and thus, improving productivity.

In addition, a gelled or solidified alcohol fuel can be quickly made, and safety can be ensured since it can be produced quickly only by stirring without using a separate heat source.

An object of the present invention is to provide a fuel composition having increased calorific value and combustion duration compared to conventional gelled or solidified alcohol fuels. Hereinafter, the present invention will be described in detail.

The gelled or solidified alcohol fuel composition of the present invention comprises alcohol, a calorie increase agent and a thickener.

The alcohol is a main fuel component for functioning as a fuel. The alcohols include methyl alcohol, ethyl alcohol, normal propyl alcohol, isopropyl alcohol, second amyl alcohol, second butyl alcohol, third butyl alcohol, normal amyl alcohol, isoamyl alcohol, second amyl alcohol, third amyl alcohol. And normal hexyl alcohol. Any one of these may be used, or two or more types may be mixed and used. Preferably, methanol, safe ethanol, or a mixture thereof with good cost-effectiveness may be used.

When methyl alcohol as described above is used as the main component of fuel, the amount of heat is usually about 18.2 MJ/L. However, in the case of having such a range of heat, there is a problem in that a large amount of gelled or solidified alcohol fuel must be used because the calorific value is insufficient, especially when used as a heating fuel for curing concrete in winter.

Accordingly, the present invention includes a calorie increase agent for increasing caloric value. The heat increase agent may be a polyhydric alcohol mixture. The calorific value increasing agent of the polyhydric alcohol has a caloric value of 24 to 42 MJ/L, and when these are mixed and used, the insufficient calorific value of the alcohol alone may be increased.

The heat increase agent may be a polymer polyhydric alcohol, for example, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, regenerated glycerin, dihydric alcohol, and trihydric alcohol. If necessary, it may further contain liquid paraffin.

The heat increase agent such as polyhydric alcohol or liquid paraffin may be used in an amount ranging from 10 to 70% by weight in 100% by weight of the gelled or solidified alcohol fuel composition. If the content of the calorie increase agent is less than 10% by weight, the effect of increasing the calorific value due to the use of the calorie increase agent is not sufficient, and if it exceeds 70% by weight, the content of methyl alcohol is relatively reduced. This is not preferable because there is a problem in that combustibility is deteriorated. For example, the heat increase agent 10 to 60% by weight, 10 to 50% by weight, 10 to 45% by weight, 10 to 40% by weight, 10 to 30% by weight, 15 to 60% by weight, 15 to 50% by weight , 15 to 45% by weight, 15 to 40% by weight, may be included in an amount such as 15 to 30% by weight.

On the other hand, the gelled or solidified alcohol fuel composition of the present invention includes a thickener for gelling or solidifying. The thickener may be suitably used in the present invention as long as it is commonly used for increasing the gelling or solidified fuel, and may include carbopul and cellulose.

As the thickening agent, carbopul has a property of increasing viscosity of about 30 minutes, being sensitive to temperature and pH in increasing viscosity, and dissolving well. On the other hand, as a thickener, the cellulose-based material takes 30 minutes to 8 hours to increase, and the material added after the increase is made viscous.

It is more preferable in the present invention to use cellulose among these thickeners. When the cellulose is used as a thickener, when a small amount of the reaction initiator described below is applied, the viscosity can be increased significantly and quickly compared to the time required for increasing the viscosity, and the time for increasing the viscosity can be shortened. Furthermore, a separate operation such as raising the temperature to increase the viscosity is not required.

Cellulose suitable as the thickener may include, for example, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropylmethyl cellulose, and the like, and these may be used alone or in combination.

The thickener may be included in an amount of 0.1 to 5% by weight in 100% by weight of the gelled or solidified alcohol fuel composition. When the content of the thickener is used in an amount of less than 0.1% by weight, the viscosity is too weak, and when it exceeds 5% by weight, there is a problem that the viscosity is solidified during manufacture and causes difficulty in operation when put in a container. Gelled or solidified alcoholic fuel or solidified alcoholic fuel may be prepared by appropriately adjusting the amount of the thickener within the above-described content range. For example, the thickener is 0.1 to 4.5% by weight, 0.1 to 4% by weight, 0.1 to 3.5% by weight, 0.1 to 3% by weight, 0.3 to 4.5% by weight, 0.3 to 4% by weight, 0.3 to 3.5% by weight, It may be included in an amount of 0.3 to 3% by weight, 0.5 to 4.5% by weight, 0.5 to 4% by weight, 0.5 to 3.5% by weight, 0.5 to 3% by weight, and the like.

The fuel composition of the present invention includes a carbonate compound selected from the group consisting of dimethyl carbonate, diethyl carbonate and ethyl dicarbonate. The carbonate compound is a VOC avoiding substance and makes it possible to avoid VOC regulation. In addition, when the carbonate compound is included in the fuel composition, an effect of increasing the amount of heat is provided, and further, an effect of reducing the generation of soot during combustion is provided.

The carbonate compound may be included in an amount of 0.1 to 90% by weight in the fuel composition. When it is contained in an amount of less than 0.1% by weight, it is difficult to provide the effect obtained by the addition of the carbonate compound, and when it exceeds 90% by weight, the content of alcohol, which is a main component of the fuel, is relatively reduced, which is not preferable.

The carbonate compound is, for example, 0.1 to 70% by weight, 0.1 to 50% by weight, 0.1 to 40% by weight, 0.5 to 70% by weight, 0.5 to 50% by weight, 1 to 70% by weight, 1 to 50% by weight, It may be included in an amount of 1 to 40% by weight, 5 to 70% by weight, 5 to 50% by weight, 5 to 40% by weight, 10 to 70% by weight, 10 to 50% by weight, and 10 to 40% by weight. It may be more preferably 1 to 50% by weight, even more preferably 5 to 50% by weight.

In the gelled or solidified alcohol fuel composition, the balance excluding a heat increase agent such as polyhydric alcohol, a thickener, and a carbonate compound is alcohol. More specifically, the alcohol may be included in an amount of 5 to 85% by weight. For example, 10 to 85% by weight, 10 to 80% by weight, 10 to 75% by weight, 15 to 85% by weight, 15 to 80% by weight, 15 to 75% by weight, 20 to 85% by weight, 20 to 80% by weight %, 20 to 75% by weight, 30 to 85% by weight, 30 to 80% by weight, 30 to 75% by weight, and the like.

The fuel composition provided by the present invention contains alcohol as a main component of the fuel, and by including it together with a heat increase agent such as polyhydric alcohol, it is possible to increase the amount of heat. In the case of using the existing methyl alcohol, the calorific value of 10,400 Kcal and the combustion duration of about 6 to 7 hours when burning 17 liters are shown, but the gelled or solidified alcohol fuel according to the present invention has a calorific value of 15,000 to 25,000 Kcal and combustion of 17 liters. Hours can provide a combustion duration of 9 to 12 hours. Therefore, compared to the case of using a conventional fuel that does not contain a calorie increase agent such as polyhydric alcohol, the gelled or solidified fuel by the fuel composition of the present invention can provide a significantly higher calorific value and duration.

Further, the gelled fuel obtained by the present invention has a viscosity in the range of 55000 to 100,000 cps, a specific gravity of 0.85 to 1.125 (25°C/25°C), and a pH of 7 to 8.5.

In the case of producing a solidified fuel as needed, a solidifying agent may be further included. The solidifying agent may be used that has a function of solidifying by increasing viscosity and providing a heat reinforcing function. The solidifying agent is at least one selected from the group consisting of hydrated styrene thermoplastic elastomer, potassium carbonate, H ₂ Mg ₃ (SiO ₃ ) ₄ , Mg ₃ Si ₄ O ₁₀ (OH) ₂ , titanium oxide Can be mentioned. These solidifying agents may be added in an amount of 1 to 5% by weight based on 100% by weight of the fuel composition of alcohol, calorie increasing agent and thickener.

By mixing the fuel composition as described above and increasing the viscosity to gel or solidify, a gelled or solidified alcohol fuel can be prepared. In order to increase the viscosity, it can be carried out by stirring as commonly used. The stirring may be performed at room temperature, as well as increased viscosity by stirring while heated to a temperature of 45° C. or less. In this case, the agitation may be performed for 15 minutes or more, for example, 30 minutes to 8 hours, 30 minutes to 3 hours.

In the production of the gelled or solidified alcohol fuel, the fuel composition of the present invention may further include a reaction initiator. The reaction initiator promotes a reaction for gelling or solidifying the gelled or solidified alcohol fuel composition, and thus gelation or solidification of the alcohol fuel composition can be achieved in a short time. Accordingly, the manufacturing time of the gelled or solidified alcohol fuel can be significantly shortened, and further, a heating process required for gelling can be omitted. Therefore, it is possible to obtain an effect of improving the productivity of the gelled alcohol fuel and reducing the manufacturing cost. Such an effect can be obtained particularly in the case of using a cellulose system as a thickener.

As the reaction initiator, it is preferable to use strong bases such as NaOH and KOH, NaOH dissolved in alcohol, and the like. These may be used alone, or may be mixed and used. When these reaction initiators are added, a gelling reaction occurs from the time of addition, and gelation or solidification can be achieved by stirring for 3 minutes or less, for example, 5 to 90 seconds or 5 to 50 seconds.

The reaction initiator may include a reaction initiator in an amount of 0.1 to 5% by weight based on 100% by weight of the total amount of the calorie increase agent, the thickener and the alcohol. When the content of the reaction initiator is less than 0.1% by weight, the effect of increasing the reaction initiation rate is insignificant, and when the content of the reaction initiator exceeds 5% by weight, sparks may spatter, and it is preferable to add within the above range.

If necessary, when a solidified fuel is to be prepared, a correction agent that may be added may be added together with the reaction initiator.

The gelled alcohol fuel of the present invention can maintain a constant gel state through agitation just by adding methyl alcohol after gelation.

Example

Hereinafter, the present invention will be described in more detail with reference to examples. The following examples illustrate an example of the present invention, and are not intended to limit the present invention.

Example 1

300 ml of an 80% concentration of regenerated glycerin aqueous solution and 150 ml of dimethyl carbonate were added to 600 ml of methanol under stirring as a heat increase agent, and stirring was continued.

Then, while maintaining stirring, a thickener solution prepared by adding 2 g of hydroxyethyl cellulose as a thickener to 100 ml of water was added to the methanol.

Next, while maintaining stirring, 0.2 g of NaOH as an initiator was added to the methanol solution to prepare a composition.

It was confirmed that the composition gelled after about 30 seconds.

The gelled fuel thus obtained was analyzed, and the results are shown in Table 1 below.

At this time, the calorific value and combustion time are values measured based on 17L of gelled fuel.

Comparative Example 1

2 g of carbophil was added to 200 ml of water and stirred for about 30 minutes to prepare a thickener solution. The thickener solution was stirred in 800 ml of methanol and then stirred for an additional 30 minutes while heating to about 45°C.

Thereby, the gelled fuel was analyzed, and the results are shown in Table 1.

The physical properties of the resulting gelatinous methanol fuel were measured, and the results are shown in Table 1 below.

At this time, the calorific value and combustion time are values measured based on 17L of gelled fuel.

Evaluation item Calorific value per hour color Viscosity (cps) Specific gravity (25℃/25℃) Combustion time (hr) pH value Example 1 About 18,000Kcal Black brown About 75000 About 1.002 About 11 8 Comparative Example 1 About 11,640Kcal Brown, white 55000 0.803 6-8 7.6

As can be seen from Table 1 above, it can be seen that the gelled fuel according to the present invention has a remarkably superior calorific value compared to the conventional gelled fuel, and the combustion time is also significantly increased.

Claims (11)

10 to 70% by weight of a caloric increasing agent of polyhydric alcohol;
0.1 to 5% by weight of a cellulose thickener;
0.1 to 90% by weight of a carbonate compound selected from the group consisting of dimethyl carbonate, diethyl carbonate and ethyl dicarbonate; And
20 to 85% by weight of at least one alcohol of methanol and ethanol
It includes, gelled or solidified alcohol fuel composition. The alcohol fuel composition of claim 1, wherein the polyhydric alcohol is at least one selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol and glycerin, regenerated glycerin, dihydric alcohol and trihydric alcohol. The alcohol fuel composition of claim 1, wherein the cellulose-based thickener is at least one of hydroxymethyl cellulose, hydroxy ethyl cellulose, and hydroxypropylmethyl cellulose. The alcohol fuel composition according to any one of claims 1 to 3, wherein the fuel composition further comprises 0.1 to 5% by weight of a reaction initiator based on 100% by weight of the total amount of the heat increase agent, thickener, and alcohol. The alcohol fuel composition of claim 4, wherein the reaction initiator is at least one of NaOH, KOH, and NaOH dissolved in alcohol. According to claim 4, Hydrogenated styrene thermoplastic elastomer (Hydrogenated styrene thermoplastic elastomer), potassium carbonate, H ₂ Mg ₃ (SiO ₃ ) ₄ , Mg ₃ Si ₄ O ₁₀ (OH) ₂ , selected from the group consisting of titanium oxide. An alcohol fuel composition further comprising 1 to 5% by weight of at least one solidifying agent based on 100% by weight of the fuel composition. 10 to 50% by weight of a heat increase agent of polyhydric alcohol; 0.1 to 5% by weight of a cellulose thickener; And mixing at least one alcohol of methanol and ethanol as a balance to form a fuel composition. And
Gelling or solidifying by adding 0.1 to 5% by weight of at least one reaction initiator of NaOH, KOH and NaOH dissolved in alcohol with respect to 100% by weight of the fuel composition
Alcohol fuel manufacturing method comprising a. The method of claim 7, wherein the gelling or solidification is performed for 5 to 90 seconds. The method of claim 7, wherein the polyhydric alcohol is at least one selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, regenerated glycerin, dihydric alcohol and trihydric alcohol. The method of claim 7, wherein the cellulose-based thickener is at least one of hydroxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropylmethyl cellulose. The method of any one of claims 7 to 10, wherein the gelling or solidifying step is a hydrated styrene thermoplastic elastomer, potassium carbonate, H ₂ Mg ₃ (SiO ₃ ) ₄ , Mg ₃ Si ₄ O ₁₀ (OH) ₂ , alcohol fuel production method further comprising 1 to 5% by weight based on 100% by weight of the fuel composition at least one solidifying agent selected from the group consisting of titanium oxide.