KR20180087583A - Method of manufacturing solid fuel and the solid fuel made by thereof - Google Patents

Abstract

The present invention relates to a method for producing a solid fuel and a solid fuel produced thereby. The method for producing a solid fuel according to the present invention comprises: a fuel composition preparation step of preparing a fuel composition by mixing and pulverizing 100 parts by weight of coals with 3-4 parts by weight of biomass, 3.5-5.5 parts by weight of elvan, and 2.5-3.5 parts by weight of lime with respect to 100 parts by weight of the coals; an additive preparation step of preparing an additive by dissolving 0.8-1 part by weight of sodium nitrate and 0.8-1 part by weight of caustic soda in 60-80 parts by weight of water with respect to 100 parts by weight of the coals; a fuel paste preparation step of mixing the fuel composition with the additive to prepare a fuel paste; a solid fuel molding step of compressing and molding the fuel paste into a solid fuel; and a drying step of drying the solid fuel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for producing a solid fuel,

The present invention relates to a solid fuel production method and a solid fuel produced thereby, and more particularly, to a solid fuel production method for minimizing smoke and gas harmful to the human body occurring during combustion, improving fuel performance, And a solid fuel produced thereby.

Generally, coal is a blackish-brown flammable rock produced by sedimentation and burial of geological plants and aquatic plants in the geological period, followed by heating and pressurization, and coal can be classified into bituminous coal and anthracite coal.

When carbon contained in coal is completely burned, carbon dioxide is produced. However, when incomplete combustion is performed, large amounts of smoke and odor including carbon monoxide and toxic substances harmful to the human body are generated, thereby causing environmental pollution.

In addition, in the case of the conventional solid fuel using coal as the main material, there is a problem that it is difficult to obtain a relatively high calorific value in addition to a large amount of harmful substances discharged in the combustion process.

In order to solve the above problems, in the prior art, a solid fuel using expensive activated carbon has been developed. However, the solid fuel including activated carbon has a problem that the production cost is raised, the combustion of the fuel itself is active, There was a problem. In addition, if the content of activated carbon is reduced, the production cost is decreased, but the adsorption effect on the organic and toxic substances is significantly reduced.

Therefore, there is a need for a solid fuel manufacturing method that can reduce the harmful substances generated in the combustion process of solid fuel during heating of the solid fuel, which can improve the heating value, and maintain the sufficient use time .

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a method for producing solid fuel excellent in adsorption effect on the organic and inorganic toxic materials and a solid fuel produced thereby.

Another object of the present invention is to provide a solid fuel production method capable of improving the calorific value and sufficiently maintaining the combustion time, and to provide a solid fuel produced thereby.

It is still another object of the present invention to provide a solid fuel production method capable of preventing the oxidation of solid fuel, preventing the propagation of harmful bacteria occurring in a humid environment, and reducing dust generation, and providing a solid fuel produced thereby .

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. And will be included in a wide range.

The present invention relates to a method for producing a solid fuel and a solid fuel produced thereby, comprising 100 parts by weight of coal, 3 to 4 parts by weight of biomass on the basis of 100 parts by weight of the coal, 3.5 to 5.5 parts by weight of elvan, By weight based on 100 parts by weight of the coal, 0.8 to 1 part by weight of sodium nitrate and 0.8 to 1 part by weight of caustic soda in a proportion of 60 to 80 parts by weight based on 100 parts by weight of the coal, A step of producing a fuel paste by mixing the fuel composition and an additive to produce a fuel paste, a step of compacting and molding the fuel paste to form a solid fuel, And a drying step of drying the fuel.

Further, the biomass is characterized in that it comprises any one or a mixture of two or more selected from the group consisting of bamboo, pine sawdust and corn.

Further, it is characterized in that at least one of the fuel composition or the additive further comprises a carbon monoxide removal catalyst.

Further, the carbon monoxide removing catalyst is a manganese-based metal oxide low-temperature catalyst.

The method of producing a solid fuel according to the present invention and the solid fuel produced by the method have an excellent effect of adsorbing to organic and inorganic toxic substances and minimize the generation of fumes and gases harmful to the human body during combustion, have.

In addition, the method for producing a solid fuel according to the present invention and the solid fuel produced therefrom have an effect of improving the fuel efficiency of the solid fuel by improving the calorific value and maintaining the combustion time sufficiently.

In addition, the method for producing solid fuel according to the present invention and the solid fuel produced thereby can prevent oxidation, prevent the propagation of harmful bacteria occurring in a humid environment, reduce dust generation, Can be facilitated.

In addition, other effects of the present invention can be achieved not only in the embodiments described above and in the claims of the present invention, but also in terms of the effects that can be easily obtained from them and the possibility of provisional advantages contributing to industrial development And that they will be included in a broader range.

1 is a flow chart illustrating a method for producing a solid fuel according to the present invention.
Fig. 2 is a test report showing the result of analyzing the fuel characteristics of the solid fuel produced according to the embodiment 1 of the present invention. Fig.
3 is a photograph taken during the combustion process of the solid fuel produced by the solid fuel manufacturing method according to the present invention.

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings.

1 is a flowchart showing a method for producing a solid fuel according to the present invention.

1, the method for producing a solid fuel according to the present invention comprises 100 parts by weight of coal, 3 to 4 parts by weight of biomass, 3.5 to 5.5 parts by weight of elvan, and 2.5 to 3.5 parts by weight of lime on the basis of 100 parts by weight of the coal, Preparing an additive for producing an additive in which 0.8 to 1 part by weight of sodium nitrate and 0.8 to 1 part by weight of caustic soda are dissolved in 60 to 80 parts by weight of water based on 100 parts by weight of the coal; A fuel paste producing step of mixing the fuel composition and an additive to produce a fuel paste, a solid fuel forming step of compressing and molding the fuel paste to form a solid fuel, and a drying step of drying the solid fuel .

(Fuel composition production step)

The fuel composition manufacturing step is a step of preparing a fuel composition in the production of a solid fuel. The fuel composition is prepared by mixing coal, which is the main material of the solid fuel of the present invention, biomass, elvan, and lime, The size of the pulverized powder is not limited, but the size of the powder is preferably 1 to 2 mm so that the raw materials of the fuel composition are uniformly mixed.

The coal may be any one selected from peat, lignite, peat, athan, bituminous coal, and anthracite coal, which is used as a main raw material for the solid fuel of the present invention. In the present invention, The solid fuel can be produced by using the lignite as the main raw material or the solid fuel manufacturing method of the present invention may use any kind of coal as the main raw material.

The biomass includes various plant resources produced by photosynthesis and an animal that consumes the same, and refers to an organic material capable of being converted into energy by being a renewable material extracted from trees, agricultural products, feed crops, agricultural wastes, and marine life . In the case of coal, especially low-grade lignite, the biomass contains a large amount of impurities that can not be easily burned, so that incomplete combustion occurs during combustion. Therefore, these components are further burned. In the present invention, Wastes and the like, and among them, any one or a mixture of two or more selected from the group consisting of bamboo, pine sawdust and corn is included.

In particular, bamboo emits far-infrared rays at high temperatures to effectively absorb infrared rays into gas-fumes generated during combustion of solid fuels, thereby increasing the calorific value of solid fuel due to activation of thermal motion, . Bamboo also prevents the oxidation of solid fuels, allowing long-term storage of manufactured solid fuels. In addition, since bamboo can burn toxic substances including carbon monoxide by oxidizing gas and soot with heat when burning solid fuel, it can reduce atmospheric pollution by using bamboo as raw material of solid fuel.

If the amount of the biomass added is less than 3 parts by weight based on 100 parts by weight of coal, the effect of synergistic combustion of the solid fuel is insufficient, and if it exceeds 4 parts by weight, the calorific value of the solid fuel produced may be lowered.

The elvan serves as a pore of the solid fuel, thereby enabling the complete combustion of the solid fuel as well as the heat of the high efficiency to be exerted. In addition, since the elvan is strong in adsorption, it adsorbs harmful components and emits far infrared rays when heat is applied, and acts to neutralize or adsorb toxic substances together with strong deodorizing action. Therefore, when burning, harmful gas components such as carbon monoxide are adsorbed, . In addition, because of its adsorption property, it absorbs moisture during storage of the solid fuel, thereby contributing to maintaining the optimum condition of the solid fuel and preventing the propagation of harmful bacteria that may occur in a humid environment. .

If the added amount of the elvan is less than 3.5 parts by weight with respect to 100 parts by weight of coal, the harmful component has a weak adsorption effect, and if it exceeds 5.5 parts by weight, the calorific value of the solid fuel produced may be lowered.

The lime serves to purify the sulfur component contained in the coal, and since it has strong adhesiveness, it can increase the bonding strength between the components contained in each solid fuel when the solid fuel is produced, thereby improving the solidifying force of the solid fuel .

When the amount of the lime added is less than 2.5 parts by weight with respect to 100 parts by weight of coal, the sulfur component purifying effect and the coagulation bonding force are weak. When the amount of lime is more than 3.5 parts by weight, the sulfur component purification effect and the coagulation- It is economically undesirable.

It is also preferable that the fuel composition as described above further comprises wheat flour. The wheat flour is intended to improve the solidifying ability of the solid fuel. When wheat flour is added together with lime, compared with the case where only lime is added, It is possible to prevent the dust from coming off from the corner of the fuel. When the amount of the flour is less than 5 parts by weight based on 100 parts by weight of coal, the solidifying ability of the solid fuel is not sufficient. If the amount of the flour is more than 6 parts by weight, the coagulation strength is not sufficiently increased.

In addition, it is also preferable that the fuel composition further contains loess, and loess is an inorganic material, which does not function as an energy source in itself, but has excellent bonding properties with other components owing to the porous structure, And the solidifying force of the solid fuel is improved to prevent the solid fuel from breaking during storage. The loess also plays a role of neutralizing or adsorbing toxic substances together with strong deodorizing action like elvan. In addition, the loess is excellent in air permeability due to its porous structure, which contributes to maintaining the optimal condition for storage of the solid fuel.

(Additive preparation step)

Wherein the additive is a step for producing an additive containing a component capable of effectively reducing a toxic gas or soot, wherein the additive is added to 60 to 80 parts by weight of water based on 100 parts by weight of the coal, 0.8 to 1.2 parts by weight of sodium nitrate And 0.8 to 1.2 parts by weight of caustic soda.

The water makes it possible to uniformly adhere the raw materials of the fuel composition when preparing the fuel paste, and when the amount of water is less than 60 parts by weight based on 100 parts by weight of coal, the viscosity of the fuel paste made by mixing the fuel composition and the additive The time required for supplying the fuel paste to the compression molding machine can be shortened and the efficiency of the manufacturing process can be reduced. When the amount of the fuel paste is more than 80 parts by weight, drying time required for drying the molded solid fuel is reduced, Which is undesirable.

Said nitrate is sodium nitrate (NaNO3), which serves to remove toxic gases and soot generated during combustion of solid fuel.

The caustic soda is sodium hydroxide (NaOH), which acts to neutralize corrosiveness and acidity, and can remove toxic gases and soot generated when burning solid fuel such as sodium nitrate.

If the added amount of sodium nitrate or caustic soda is less than 0.8 part by weight based on 100 parts by weight of coal, toxic gas and soot removal effect is not sufficient. If it exceeds 0.4 part by weight, toxic gas And the effect of removing the soot is not sufficiently increased, which is economically undesirable.

(Fuel paste production step)

The fuel paste manufacturing step may include mixing the fuel composition and the additive to produce a fuel paste, mixing the liquid additive into the fuel composition formed of the powder mixture, and injecting the mixture into a stirring device to produce a fuel paste have.

(Solid fuel forming step)

The solid fuel forming step is a step for molding the fuel paste produced in the fuel paste producing step into a solid fuel having a predetermined shape. The fuel paste is compressed and molded through a compression molding machine to form a cylindrical, The solid fuel can be molded into any shape or size suitable for combustion such as a briquette type.

In addition, the compression strength of the compression molding machine in the solid fuel molding step is preferably 1000 kg / cm 2 to 3000 kg / cm 2. When the compression strength is less than 1000 kg / cm 2, the molded solid fuel tends to be broken, Kg / cm < 2 >, the paste is excessively compressed and the pores in the molded solid fuel are so small that combustion does not occur easily, which is not preferable.

(Drying step)

The drying step reduces the moisture content of the produced solid raw material by drying the solid fuel formed in the solid fuel forming step, and the solid raw material containing a certain amount of moisture is naturally dried or dried using a dryer or the like , And in particular, it is dried in a natural air at a temperature of 10 ° C or higher for 35 to 50 hours or at a temperature of 70 ° C or higher for 4 to 6 hours so that the weight of water is 1 wt% to 10 wt% in the final weight of the final solid raw material . If the moisture content exceeds 10% by weight, the temperature rise may be delayed due to the use of a heat source for evaporating excess moisture. If the moisture content is less than 1% by weight, dust may be generated during transportation.

In addition, the solid fuel production method and the solid fuel produced thereby may further include a carbon monoxide removal catalyst in at least one of the fuel composition or the additive, and further includes the carbon monoxide removal catalyst, Carbon monoxide can be removed more effectively.

At this time, the carbon monoxide removing catalyst may be composed of a manganese-based metal oxide low-temperature catalyst, and the manganese-based metal oxide low-temperature catalyst is economical and economical as compared with commercialized noble metal-based catalysts such as platinum and titanium, However, the manganese-based metal oxide low-temperature catalyst is capable of decomposing and removing noxious gas even at a temperature of less than 150 ° C., and has a characteristic of being structurally stable even at a high temperature. By further including such a manganese-based metal oxide low-temperature catalyst in a fuel composition or an additive in the production of a solid fuel, carbon monoxide generated during combustion can be removed more effectively, thereby maximizing prevention of atmospheric pollution.

When the amount of the carbon monoxide removing catalyst is less than 0.2 parts by weight based on 100 parts by weight of coal, the carbon monoxide removing effect is not sufficient. If the amount is more than 0.4 parts by weight, the carbon monoxide removing effect is not sufficiently increased I can not.

Next, the method for producing a solid fuel according to the present invention and the solid fuel produced thereby will be described in more detail with reference to specific examples.

(Example 1)

1,000 g of lignite having a calorific value of 5,200 kcal / kg was prepared, and 35 g of bamboo, 50 g of elvan, and 30 g of lime were prepared and pulverized and mixed to prepare a fuel composition. An additive prepared by dissolving 10 g of sodium nitrate and 10 g of caustic soda in 700 g of water was prepared. The fuel composition and the additive were mixed and kneaded to obtain a fuel paste. The fuel paste was compressed and molded through a compression molding machine to obtain a solid fuel, and the solid fuel was dried in a natural air at 10 ° C or higher for 40 hours to complete solid fuel production.

(Comparative Example)

As a sample comparable to the solid fuel of Example 1, a lignite having a calorific value of 5,200 kcal / kg as the main raw material of Example 1 was prepared.

The results of analyzing the fuel characteristics of the solid fuel produced in the same manner as in Example 1 are shown in Table 1 below.

division Industrial analysis (wt%) Elemental analysis (wt%) eminence
Calorific value
(kcal / kg) Low
Calorific value
(kcal / kg) moisture Volatile matter Ash Fixed carbon carbon Hydrogen nitrogen Oxygen Sulfur Example 1 4.70 21.59 19.41 54.30 68.10 2.69 1.73 7.59 0.48 5930 5760

As shown in Table 1, the characteristics of the solid fuel fuel of Example 1 were as follows: 4.70 wt% moisture, 21.59 wt% volatile matter, 19.41 wt% ash, 54.40 wt% fixed carbon, %, And the compositional analysis of Example 1 according to the elemental analysis showed carbon 68.10 wt%, hydrogen 2.60 wt%, nitrogen 1.63 wt%, oxygen 7.59 wt%, and sulfur content 0.48 wt%.

If the water content exceeds 10 wt%, the temperature rise may be delayed due to the use of a heat source for evaporating excess moisture, and when the content of the water is less than 1 wt% It is preferable that 1 wt% to 10 wt% is used, and most preferably 5 wt% or less, such as 4.70 wt%, which is the water content of Example 1.

The volatile components are composed of oxygen, carbon monoxide, hydrogen, hydrocarbons, and sublimation minerals generated by the decomposition of the polymeric hydrocarbons and inorganic minerals. The volatile component promotes combustion during combustion, but has a lower calorific value than the fixed carbon High volatile coal generally has low calories. The fixed carbon is a remnant of flammability remaining after volatiles are volatilized, and represents an effective component as energy of solid fuel in industrial analysis. In the case of solid fuel, the volatile matter and the fixed carbon content are inversely proportional to each other. In Example 1, the volatile matter content is 21.59 wt%. In the case of the simple lignite of the comparative example, the volatile matter content is as high as about 40 wt% The content of fixed carbon is 54.30 wt%, and in the case of simple lignite of the comparative example, the content of fixed carbon is generally as low as 30 to 40 wt%, so that simple lignite is produced as in Example 1 of the present invention, Can be effectively reduced, and the amount of heat generated can be effectively improved.

 Generally, the content of sulfur in coal is within 3.5 wt%, and the content of coal is different according to the origin of coal. Generally, however, as in Comparative Example, coal has a large amount of nitrogen and fractions, and sulfur oxides and nitrogen oxides And it takes a long time until the ignition is started.

However, like the solid fuel of Example 1, the solid fuel produced by the production method of the present invention has a sulfur content of 0.5 wt% or less, thereby effectively reducing the soot and toxic gas generated during combustion, There is an effect of preventing contamination.

(Experimental Example)

1 kg of each of the solid fuel prepared in Example 1 and the simple lignite of the comparative example were prepared and combustion experiments were carried out to confirm ignition time, total combustion time, ash and the like, and compared with Example 1 according to Experimental Example The results of the experimental combustion test are shown in Table 2 below.

division Ignition time Total burning time Ash Calorific value Example 1 3 minutes 186 minutes 206 g 5900 kcal / kg Comparative Example 5 minutes 190 minutes 405 g 5200 kcal / kg

As shown in Table 2, it can be seen that the ash content in Example 1 was reduced by about 50% as compared with the Comparative Example.

In addition, Example 1 exhibited an ignition time of 3 minutes, which is shorter than the ignition time of 5 minutes of Comparative Example. Therefore, it can be confirmed that Example 1 is easier to ignite than Comparative Example.

In addition, in Example 1, the total combustion time was 186 minutes, and the total combustion time was partially reduced as compared with the total combustion time 190 minutes in the comparative example. However, this is because the biomass such as bamboo, As a result, the total amount of combustion time seems to be reduced, and the burning time is sufficiently long since the reduction time is very small. Thus, there is no difference in the combustion performance of the solid fuel , And the calorific value was improved from 5200 kcal / kg to 5900 kcal / kg, so that the solid fuel combustion performance was improved.

FIG. 3 is a photograph taken during the combustion process of the solid fuel produced by the method of manufacturing the solid fuel according to the present invention. Referring to FIG. 3, when the solid fuel burned according to the first embodiment of the present invention is burned, And it was confirmed that the solid fuel produced according to Example 1 enables complete combustion and effectively removes pollutants generated by incomplete combustion by 95% or more, It was confirmed that the solid fuel produced by Example 1 had a clean ash without worrying about secondary pollution due to complete combustion.

In addition, through the present experimental example, the simple lignite of the comparative example was able to feel symptoms such as a slight headache and dyspnea due to the generation of noxious gas along with the soot during combustion, but the solid fuel according to Example 1 did not generate soot And it was confirmed that the smell was not such a toxic component as when burning.

(Example 2)

1000 g of lignite having a calorific value of 5,200 kcal / kg was prepared, and 35 g of pine sawdust (replaceable with a corn stand), 50 g of elvan, and 30 g of lime were prepared and pulverized and mixed to prepare a fuel composition. An additive prepared by dissolving 10 g of sodium nitrate and 10 g of caustic soda in 700 g of water was prepared. The fuel composition and the additive were mixed and kneaded to obtain a fuel paste. The fuel paste was compressed and molded through a compression molding machine to obtain a solid fuel, and the solid fuel was dried in a natural air at 10 ° C or higher for 40 hours to complete solid fuel production.

(Example 3)

1,000 g of lignite having a calorific value of 5,200 kcal / kg was prepared, and 35 g of bamboo, 50 g of elvan, and 30 g of lime were prepared and pulverized and mixed to prepare a fuel composition. 10 g of sodium nitrate and 10 g of caustic soda were dissolved in 700 g of water and 4 g of a carbon monoxide removing catalyst composed of a manganese-based metal oxide low-temperature catalyst was added and mixed to prepare an additive. The fuel composition and the additive were mixed and kneaded to obtain a fuel paste. The fuel paste was compressed and molded through a compression molding machine to obtain a solid fuel, and the solid fuel was dried in a natural air at 10 ° C or higher for 40 hours to complete solid fuel production.

In addition, as a result of conducting the combustion tests of Examples 2 and 3, the ignition time, total combustion time, ash, and calorific value were almost the same as those of Example 1, and a detailed description thereof will be omitted.

In Example 2, solid fuel was produced by replacing bamboo with pine sawdust or corn in Example 1. There was no significant difference in ignition time, total combustion time, batch and calorific value with Example 1, 1, it was confirmed that the calorific value was further improved.

In Example 3, solid fuel was prepared by additionally adding a carbon monoxide removing catalyst to the additive in Example 1. There was no difference in ignition time, total combustion time, batch and calorific value with Example 1, It was confirmed that the carbon monoxide was more effectively removed in addition to the effect of Example 1.

As described above, the solid fuel manufacturing method of the present invention and the solid fuel produced by the method have the following effects.

The method of manufacturing a solid fuel according to the present invention and the solid fuel produced thereby allow the coal to be completely burned by including the biomass in the solid fuel fuel composition, and particularly when the bamboo is included, the heating value of the solid fuel is effectively improved To remove toxic substances generated during combustion. In addition, by incorporating elvan stones into the fuel composition, the calorific value of the solid fuel is effectively improved, the toxic substances generated during the combustion are adsorbed, and the lime is included in the fuel composition to purify the sulfur components. Therefore, the method of producing a solid fuel according to the present invention and the solid fuel produced by the method of the present invention can significantly reduce air pollution since the amount of harmful components including carbon monoxide and carbon dioxide generated during combustion is significantly reduced as compared with conventional coal solid fuel. In addition, the adsorbing effect on the organic and inorganic toxic substances is excellent, the calorific value is improved, and the combustion time is sufficiently sustained.

In addition, the method of manufacturing a solid fuel according to the present invention and the solid fuel produced thereby prevent bamboo from being stored for a long period of time, which absorbs moisture during storage, and can occur in a humid environment It is a lime and porous structure that helps to maintain the shape of the solid fuel by preventing the generation of dust even after drying by improving the elvan stone and coagulation bond preventing the propagation of harmful bacteria. By incorporating in the fuel composition the yellow loess contributing to maintaining the state, there is an effect of facilitating long-term storage of the produced solid fuel.

In addition, the method of producing solid fuel according to the present invention can remove soot and noxious gas generated during burning of solid fuel by preparing solid fuel including both sodium nitrate and caustic soda. Especially, both of sodium nitrate and caustic soda By mixing the additive dissolved in water with the fuel composition to produce a fuel paste so that components of the sodium nitrate and caustic soda can be distributed evenly throughout the produced fuel paste to produce a uniform quality solid fuel There is an effect.

In addition, when a solid fuel is produced through an automation process by mixing liquid additives with a fuel composition obtained by pulverizing and mixing coal, biomass, elvan, and lime, the liquid additive is compared with the additive prepared in paste form So that the supply amount and the supply time point can be easily controlled, and the malfunction rate of the supply means can be reduced, thereby improving the efficiency of the entire manufacturing process.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (5)

100 parts by weight of coal, 3 to 4 parts by weight of biomass, 3.5 to 5.5 parts by weight of elvan, and 2.5 to 3.5 parts by weight of limestone based on 100 parts by weight of the coal are produced;
0.8 to 1 part by weight of sodium nitrate and 0.8 to 1 part by weight of caustic soda are dissolved in 60 to 80 parts by weight of water based on 100 parts by weight of the coal;
A fuel paste production step of mixing the fuel composition and an additive to produce a fuel paste;
A solid fuel forming step of compressing and molding the fuel paste to form a solid fuel;
And a drying step of drying the solid fuel.
The method according to claim 1,
The biomass
Bamboo, pine sawdust, corn, and mixtures thereof.
The method according to claim 1,
Wherein at least one of the fuel composition or the additive further comprises a carbon monoxide removal catalyst.
The method of claim 3,
Wherein the carbon monoxide removing catalyst is a manganese-based metal oxide low-temperature catalyst.
A solid fuel produced by the process for producing a solid fuel according to any one of claims 1 to 4.

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