CN108587702B

CN108587702B - Preparation method of catalytic oxygen release clean fuel

Info

Publication number: CN108587702B
Application number: CN201810355182.2A
Authority: CN
Inventors: 翟琳; 何伟仁; 陈可
Original assignee: Xuzhou Xinhui Bioenergy Technology Co ltd
Current assignee: JIANGSU ZHAOWEI PLASTIC TECHNOLOGY Co.,Ltd.
Priority date: 2018-04-19
Filing date: 2018-04-19
Publication date: 2020-06-26
Anticipated expiration: 2038-04-19
Also published as: CN108587702A

Abstract

The invention discloses a preparation method of a catalytic oxygen release clean fuel, and belongs to the technical field of fuel preparation. According to the invention, the cellulose in the straw biological raw materials is decomposed into C5 sugar and C6 sugar by using the clostridium thermocellum in a fermentation method, wherein the C5 sugar is converted into furfural under the action of a solid acid catalyst, and then the furfural is oxidized under the catalytic action of green powder vanadyl phosphate to obtain furoic acid, so that the obtained clean fuel has a higher heat value; the polymer component in the plant fuel obtained by the invention is the polybutylene furan dicarboxylate, dry ice is put in the preparation process of the polybutylene furan dicarboxylate, and in addition, C6 sugar in cellulose can be firstly converted into levulinic acid in the catalysis process, so that the generation of carbon monoxide is reduced.

Description

Preparation method of catalytic oxygen release clean fuel

Technical Field

The invention discloses a preparation method of a catalytic oxygen release clean fuel, and belongs to the technical field of fuel preparation.

Background

Clean fuel refers to substances which are not harmful to human bodies and the environment when in combustion, or very trace harmful substances, such as natural gas, liquefied petroleum gas, coal gas, alcohol, lead-free gasoline, nuclear fuel and the like. On the contrary, unclean fuels are coal, stone coal, lead-containing gasoline, diesel oil and the like, and the combustion amount generates a large amount of harmful substances such as sulfur dioxide, lead steam, carbon black and the like, and the use of the unclean fuels is limited as much as possible or the unclean fuels are converted into clean fuels for use, such as coal gas.

In recent years, petrochemical energy mainly comprising petroleum, coal and natural gas has emerged as an unprecedented crisis, which has been supporting the rapid development of human civilization in the 20 th century. The traditional petrochemical fuel belongs to disposable consumption energy, is a non-renewable resource, and the storage capacity of the traditional petrochemical fuel is continuously reduced. With the gradual exhaustion of petrochemical energy, the price of the petrochemical energy is gradually becoming more expensive, and the normal sustainable development of human beings cannot be met. More seriously, scientific research finds that carbon dioxide gas generated after petrochemical energy is used is discharged into the atmosphere, the greenhouse effect is generated, global warming is artificially caused, human life is seriously influenced, and people pay attention and thinking to the development power source of the future society.

With the progress of society and the rapid development of economy and the continuous promotion of industrialization and urbanization processes, the influence of resource and environment problems on the improvement of the life of people and the increase of social economy is increasingly shown. Research and development of resource environment utilization for improving human living environment have become the focus of world attention. China is the largest developing country in the world, has a large population, has large energy demand and has prominent resource and environment problems.

At present, physical combination is mostly adopted in the technical development of renewable clean energy at home and abroad, and quality change can not be broken through all the time, so that the use requirement of various industries is met. In the early stage, the new energy which is originated in China and has been represented by alcohol groups for more than twenty years has the defects that the heat value and the temperature are low, so that the new energy cannot meet the requirements of conventional use and the like, and the new energy is not popularized and is not accepted by the market. At present, the traditional clean fuel belongs to disposable consumption energy, is a non-renewable resource, has the advantages of continuously reduced storage capacity, low calorific value and low combustion rate, still emits harmful gas in the using process, pollutes the environment and is not clean enough. Therefore, the invention of the catalytic oxygen release clean fuel has positive significance to the technical field of fuel preparation.

Disclosure of Invention

The invention mainly solves the technical problem, and provides a preparation method of a catalytic oxygen release clean fuel, aiming at the defects that the traditional clean fuel belongs to disposable consumption energy, is a non-renewable resource, has continuously reduced storage capacity, low calorific value and combustion rate, still emits harmful gas in the using process, pollutes the environment and is not clean enough.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a preparation method of a catalytic oxygen release clean fuel is characterized by comprising the following specific preparation steps:

(1) adding 100-120 g of tantalum hydroxide and 1.5-2.0L of phosphoric acid solution into a stirring kettle, starting a stirrer, stirring and reacting at a rotating speed of 200-250 r/min for 2-3 days, aging at room temperature to obtain aged sol, performing suction filtration on the aged sol, removing filtrate to obtain a filter cake, washing the filter cake with deionized water until the washing solution is neutral, placing the washed filter cake into a vacuum drying box, drying to obtain dried solid, placing the dried solid into a mortar for grinding, sieving to obtain powder, placing the powder into a muffle furnace, heating and calcining to obtain a solid acid catalyst;

(2) putting 20-30 parts of straws, 30-35 parts of grass seed hulls and 20-25 parts of corncobs into a fermentation tank, adding 30-40 parts of deionized water, 20-30 parts of sulfuric acid solution and 4-5 parts of clostridium thermocellum powder into the fermentation tank, sealing the fermentation tank, controlling the fermentation temperature to be 40-45 ℃, and sealing and fermenting to obtain a fermentation product;

(3) filtering the fermentation product to remove filter residues to obtain fermentation liquor, mixing 200-250 mL of fermentation liquor with a solid acid catalyst, putting the mixture into a reaction kettle, vacuumizing the reaction kettle, heating, raising the temperature, starting a stirrer, stirring and reacting at a rotating speed of 300-350 r/min for 3-4 hours to obtain a reaction product, and filtering and separating the reaction product to obtain a fermentation fuel;

(4) putting 4-5 g of vanadium pentoxide, 15-20 mL of isobutanol and 8-10 mL of benzyl alcohol into a three-neck flask with a condensation reflux device, heating, adding 10-12 mL of phosphoric acid solution into the three-neck flask after condensation reflux, continuing condensation reflux to obtain a light green product, putting the light green product into a muffle furnace, heating, and heating until calcination is carried out to obtain green powder;

(5) putting 20-30 g of fermentation fuel into a conical flask filled with 100-120 mL of sodium hydroxide solution, heating and raising the temperature, introducing air into the conical flask, after heat preservation reaction, pouring a product in the conical flask into a high-pressure reaction kettle, adding 4-5 g of sodium furoate, 0.8-1.0 g of the green powder and 10-15 g of dry ice into the high-pressure reaction kettle, heating and raising the temperature, and performing heat preservation reaction to obtain oxygen-containing catalytic fuel;

(6) mixing isopropanol and methanol to obtain liquid fuel, mixing pulverized coal, micron magnesium powder and oxygen-containing catalytic fuel to obtain solid fuel, adding the solid fuel into the liquid fuel, and stirring and dispersing to obtain the catalytic oxygen-releasing clean fuel.

The phosphoric acid solution in the step (1) is 10% in mass fraction, the aging time is 12-15 hours at room temperature, the set temperature of a vacuum drying oven is 110-120 ℃, the drying time is 2-3 hours, the screened size is 200 meshes, the temperature after heating is 300-350 ℃, and the calcining time is 3-4 hours.

The mass fraction of the sulfuric acid solution in the step (2) is 5%, the fermentation temperature is controlled to be 40-45 ℃, and the sealed fermentation time is 6-7 days.

And (3) vacuumizing the reaction kettle to 80-100 Pa, and heating to 150-160 ℃.

And (4) heating the three-neck flask to raise the temperature to 80-90 ℃, carrying out condensation reflux for 12-13 h, carrying out continuous condensation reflux for 6-7 h by using the phosphoric acid solution with the mass fraction of 80%, carrying out heating in a muffle furnace to raise the temperature to 400-450 ℃, and carrying out calcination for 4-5 h.

And (5) heating the conical flask to 60-70 ℃, introducing air into the conical flask at a rate of 70-80 mL/min, introducing air for 10-15 min, keeping the temperature for reaction for 20-30 min, heating the high-pressure reaction kettle to 80-90 ℃, and keeping the temperature for reaction for 7-8 h.

The mixing volume ratio of the isopropanol to the methanol in the step (6) is 1: 3, the particle size of the pulverized coal and the micron magnesium powder is 20-40 mu m, the mixing mass ratio of the pulverized coal, the micron magnesium powder and the oxygen-containing catalytic fuel is 5: 1: 10, the stirring and dispersing rotating speed is 400-500 r/min, and the mass of the solid fuel is controlled to be 5-10% of that of the liquid fuel.

The invention has the beneficial effects that:

(1) the invention mixes tantalum hydroxide and phosphoric acid solution, after stirring reaction, the aging sol is obtained by aging, the aging sol is filtered, washed, dried, ground and calcined to obtain catalytic powder, the waste plant raw materials such as straw, grass seed shells, corncobs and the like are placed into a fermentation tank, deionized water, sulfuric acid solution and clostridium thermocellum powder are added, fermentation is obtained by sealed fermentation, the fermentation is filtered to remove filter residue to obtain fermentation liquor, the catalytic powder is added into the fermentation liquor, the mixing and stirring reaction are carried out to obtain fermentation fuel, vanadium pentoxide and phosphoric acid solution are used as raw materials, isobutanol and benzyl alcohol are used as solvents, green powder is obtained by condensation reflux and calcination, the fermentation fuel is placed into sodium hydroxide solution, air is introduced, sodium furoate, green powder and dry ice are added, after heating reaction is carried out for a period of time, oxygen-containing catalytic fuel is obtained, isopropanol and methanol are mixed to prepare liquid fuel, mixing oxygen-containing catalytic fuel, magnesium powder and coal powder to obtain solid fuel, adding the solid fuel into liquid fuel to obtain catalytic oxygen-releasing clean fuel, decomposing cellulose in straw biological raw materials into C5 sugar and C6 sugar by using a fermentation method through clostridium thermocellum powder, wherein the C5 sugar is converted into furfural under the action of a solid acid catalyst, then oxidizing the furfural under the catalytic action of green powder vanadyl phosphate to obtain furoic acid, adding sodium furoate into the furoic acid, carrying out disproportionation reaction to obtain furandicarboxylic acid and furan, simultaneously converting the furan into 1, 4-butanediol, finally preparing and obtaining polybutylene furan dicarboxylate by taking the furan dicarboxylic acid and the 1, 4-butanediol as monomers, completely converting carbon in plant raw materials after the series of reaction processes, and applying all components to obtain the oxygen-containing catalytic fuel with extremely high carbon content, the liquid fuel also selects isopropanol and methanol with high carbon content, so that the obtained clean fuel has higher heat value;

(2) the polymer component in the plant fuel obtained by the invention is the polybutylene furan dicarboxylate, the dry ice is put in the preparation process, the dry ice can keep higher pressure in a reaction kettle in the reaction process, the excessive increase of the polymerization degree of the polybutylene furan dicarboxylate can be inhibited, the molecular weight of the polymer is reduced, the polymer is favorable for achieving the purposes of quick combustion and sufficient combustion in the combustion process, in addition, C6 sugar in cellulose can be firstly converted into levulinic acid in the catalysis process, the levulinic acid is then converted into valeric acid, the valeric acid is esterified with 1, 4-butanediol to obtain alkyl valerate, both the valerate substances and the polybutylene furan dicarboxylate are higher fuels, green powder vanadyl phosphate is used as a catalyst, the high specific surface area of the vanadyl phosphate is utilized to promote the oxidative combustion of oxygenated fuels, the generation of carbon monoxide is reduced, and the alkyl valerate is volatile in the combustion process, the invention takes methanol as main liquid fuel, can slow down the problem of excess methanol productivity in China, the combustion product basically does not contain harmful gases such as nitride, sulfide and the like, the used micron magnesium powder can not only support combustion, but also has the desulfurization effect on coal powder in solid fuel, so that the fuel is cleaner, and the application prospect is wide.

Detailed Description

Adding 100-120 g of tantalum hydroxide and 1.5-2.0L of phosphoric acid solution with the mass fraction of 10% into a stirring kettle, starting a stirrer, stirring and reacting at the rotating speed of 200-250 r/min for 2-3 days, aging at room temperature for 12-15 hours to obtain aged sol, performing suction filtration on the aged sol, removing filtrate to obtain a filter cake, washing the filter cake with deionized water until the washing liquid is neutral, placing the washed filter cake into a vacuum drying box with the set temperature of 110-120 ℃, drying for 2-3 hours to obtain dried solid, placing the dried solid into a mortar for grinding, sieving with a 200-mesh sieve to obtain powder, placing the powder into a muffle furnace, heating to 300-350 ℃, and calcining for 3-4 hours to obtain a solid acid catalyst; putting 20-30 parts of straws, 30-35 parts of grass seed hulls and 20-25 parts of corncobs into a fermentation tank, adding 30-40 parts of deionized water, 20-30 parts of a sulfuric acid solution with the mass fraction of 5% and 4-5 parts of clostridium thermocellum powder into the fermentation tank, sealing the fermentation tank, controlling the fermentation temperature to be 40-45 ℃, and sealing and fermenting for 6-7 days to obtain a fermentation product; filtering the fermentation product to remove filter residues to obtain fermentation liquor, mixing 200-250 mL of fermentation liquor with a solid acid catalyst, putting the mixture into a reaction kettle, vacuumizing the reaction kettle to 80-100 Pa, heating to 150-160 ℃, starting a stirrer, stirring at a rotating speed of 300-350 r/min for reaction for 3-4 hours to obtain a reaction product, and filtering and separating the reaction product to obtain a fermentation fuel; putting 4-5 g of vanadium pentoxide, 15-20 mL of isobutanol and 8-10 mL of benzyl alcohol into a three-neck flask with a condensation reflux device, heating to 80-90 ℃, after carrying out condensation reflux for 12-13 h, adding 10-12 mL of 80 mass percent phosphoric acid solution into the three-neck flask, continuing to carry out condensation reflux for 6-7 h to obtain a light green product, putting the light green product into a muffle furnace, heating to 400-450 ℃, and calcining for 4-5 h to obtain green powder; putting 20-30 g of fermentation fuel into a conical flask filled with 100-120 mL of sodium hydroxide solution, heating to 60-70 ℃, introducing air into the conical flask at a ventilation rate of 70-80 mL/min, ventilating for 10-15 min, after carrying out heat preservation reaction for 20-30 min, pouring the product in the conical flask into a high-pressure reaction kettle, adding 4-5 g of sodium furoate, 0.8-1.0 g of the green powder and 10-15 g of dry ice into the high-pressure reaction kettle, heating to 80-90 ℃, and carrying out heat preservation reaction for 7-8 h to obtain the oxygen-containing catalytic fuel; mixing isopropanol and methanol according to a volume ratio of 1: 3 to obtain liquid fuel, mixing pulverized coal, micron magnesium powder with the particle size of 20-40 mu m and oxygen-containing catalytic fuel according to a mass ratio of 5: 1: 10 to obtain solid fuel, doping the solid fuel into the liquid fuel, stirring and dispersing at a rotating speed of 400-500 r/min, and controlling the mass of the solid fuel to be 5-10% of that of the liquid fuel to obtain the catalytic oxygen release clean fuel.

Example 1

Adding 100g of tantalum hydroxide and 1.5L of phosphoric acid solution with the mass fraction of 10% into a stirring kettle, starting a stirrer, stirring and reacting at the rotating speed of 200r/min for 2 days, aging at room temperature for 12 hours to obtain aged sol, performing suction filtration on the aged sol, removing filtrate to obtain a filter cake, washing the filter cake with deionized water until the washing solution is neutral, placing the washed filter cake into a vacuum drying box with the set temperature of 110 ℃, drying for 2 hours to obtain dried solid, placing the dried solid into a mortar for grinding, sieving with a 200-mesh sieve to obtain powder, placing the powder into a muffle furnace, heating to 300 ℃, and calcining for 3 hours to obtain a solid acid catalyst; putting 20 parts of straws, 30 parts of grass seed hulls and 20 parts of corncobs into a fermentation tank, adding 30 parts of deionized water, 20 parts of a sulfuric acid solution with the mass fraction of 5% and 4 parts of clostridium thermocellum powder into the fermentation tank, sealing the fermentation tank, controlling the fermentation temperature to be 40 ℃, and sealing and fermenting for 6 days to obtain a fermentation product; filtering the fermentation product to remove filter residues to obtain fermentation liquor, mixing 200mL of fermentation liquor with a solid acid catalyst, putting the mixture into a reaction kettle, vacuumizing the reaction kettle to 80Pa, heating to 150 ℃, starting a stirrer, stirring at a rotating speed of 300r/min for reaction for 3 hours to obtain a reaction product, and filtering and separating the reaction product to obtain a fermentation fuel; putting 4g of vanadium pentoxide, 15mL of isobutanol and 8mL of benzyl alcohol into a three-neck flask with a condensation reflux device, heating to 80 ℃, after carrying out condensation reflux for 12h, adding 10mL of 80 mass percent phosphoric acid solution into the three-neck flask, continuing to carry out condensation reflux for 6h to obtain a light green product, putting the light green product into a muffle furnace, heating to 400 ℃, and calcining for 4h to obtain green powder; putting 20g of fermentation fuel into a conical flask filled with 100-120 mL of sodium hydroxide solution, heating to 60 ℃, introducing air into the conical flask at the aeration rate of 70mL/min, aerating for 10min, after carrying out heat preservation reaction for 20min, pouring the product in the conical flask into a high-pressure reaction kettle, adding 4g of sodium furoate, 0.8g of the green powder and 10g of dry ice into the high-pressure reaction kettle, heating to 80 ℃, and carrying out heat preservation reaction for 7h to obtain oxygen-containing catalytic fuel; mixing isopropanol and methanol according to a volume ratio of 1: 3 to obtain liquid fuel, mixing pulverized coal, micron magnesium powder with the particle size of 20 microns and oxygen-containing catalytic fuel according to a mass ratio of 5: 1: 10 to obtain solid fuel, doping the solid fuel into the liquid fuel, stirring and dispersing at a rotating speed of 400r/min, and controlling the mass of the solid fuel to be 5% of that of the liquid fuel to obtain the catalytic oxygen release clean fuel.

Example 2

Adding 110g of tantalum hydroxide and 1.7L of phosphoric acid solution with the mass fraction of 10% into a stirring kettle, starting a stirrer, stirring and reacting at the rotating speed of 220r/min for 2 days, aging at room temperature for 14 hours to obtain aged sol, performing suction filtration on the aged sol, removing filtrate to obtain a filter cake, washing the filter cake with deionized water until the washing liquid is neutral, placing the washed filter cake into a vacuum drying box with the set temperature of 115 ℃, drying for 2.5 hours to obtain dried solid, placing the dried solid into a mortar for grinding, sieving with a 200-mesh sieve to obtain powder, placing the powder into a muffle furnace, heating to 320 ℃, and calcining for 3.5 hours to obtain a solid acid catalyst; putting 25 parts of straws, 32 parts of grass seed hulls and 22 parts of corncobs into a fermentation tank, adding 35 parts of deionized water, 25 parts of a 5% sulfuric acid solution and 4 parts of clostridium thermocellum powder into the fermentation tank, sealing the fermentation tank, controlling the fermentation temperature to be 42 ℃, and sealing and fermenting for 6 days to obtain a fermentation product; filtering the fermentation product to remove filter residues to obtain fermentation liquor, mixing 220mL of fermentation liquor with a solid acid catalyst, putting the mixture into a reaction kettle, vacuumizing the reaction kettle to 90Pa, heating to 155 ℃, starting a stirrer, stirring at a rotating speed of 320r/min for reaction for 3.5 hours to obtain a reaction product, and filtering and separating the reaction product to obtain a fermentation fuel; putting 4g of vanadium pentoxide, 17mL of isobutanol and 9mL of benzyl alcohol into a three-neck flask with a condensation reflux device, heating to 85 ℃, after carrying out condensation reflux for 12.5h, adding 11mL of 80 mass percent phosphoric acid solution into the three-neck flask, continuing to carry out condensation reflux for 6.5h to obtain a light green product, putting the light green product into a muffle furnace, heating to 420 ℃, and calcining for 4.5h to obtain green powder; putting 25g of fermentation fuel into a conical flask filled with 110mL of sodium hydroxide solution, heating to 65 ℃, introducing air into the conical flask at the aeration rate of 75mL/min, introducing the air for 12min, carrying out heat preservation reaction for 25min, pouring the product in the conical flask into a high-pressure reaction kettle, adding 4g of sodium furoate, 0.9g of the green powder and 12g of dry ice into the high-pressure reaction kettle, heating to 85 ℃, and carrying out heat preservation reaction for 7.5h to obtain oxygen-containing catalytic fuel; mixing isopropanol and methanol according to a volume ratio of 1: 3 to obtain liquid fuel, mixing pulverized coal, micron magnesium powder with the particle size of 30 microns and oxygen-containing catalytic fuel according to a mass ratio of 5: 1: 10 to obtain solid fuel, doping the solid fuel into the liquid fuel, stirring and dispersing at a rotating speed of 450r/min, and controlling the mass of the solid fuel to be 7% of that of the liquid fuel to obtain the catalytic oxygen release clean fuel.

Example 3

Adding 120g of tantalum hydroxide and 2.0L of phosphoric acid solution with the mass fraction of 10% into a stirring kettle, starting a stirrer, stirring and reacting at the rotating speed of 250r/min for 3 days, aging at room temperature for 15 hours to obtain aged sol, performing suction filtration on the aged sol, removing filtrate to obtain a filter cake, washing the filter cake with deionized water until the washing solution is neutral, placing the washed filter cake into a vacuum drying box with the set temperature of 120 ℃, drying for 3 hours to obtain dried solid, placing the dried solid into a mortar for grinding, sieving with a 200-mesh sieve to obtain powder, placing the powder into a muffle furnace, heating to 350 ℃, and calcining for 4 hours to obtain a solid acid catalyst; putting 30 parts of straws, 35 parts of grass seed hulls and 25 parts of corncobs into a fermentation tank, adding 40 parts of deionized water, 30 parts of a sulfuric acid solution with the mass fraction of 5% and 5 parts of clostridium thermocellum powder into the fermentation tank, sealing the fermentation tank, controlling the fermentation temperature to be 45 ℃, and sealing and fermenting for 7 days to obtain a fermentation product; filtering the fermentation product to remove filter residues to obtain fermentation liquor, mixing 250mL of fermentation liquor with a solid acid catalyst, putting the mixture into a reaction kettle, vacuumizing the reaction kettle to 100Pa, heating to 160 ℃, starting a stirrer, stirring at a rotating speed of 350r/min for reaction for 4 hours to obtain a reaction product, and filtering and separating the reaction product to obtain a fermentation fuel; putting 5g of vanadium pentoxide, 20mL of isobutanol and 10mL of benzyl alcohol into a three-neck flask with a condensation reflux device, heating to 90 ℃, after carrying out condensation reflux for 13h, adding 12mL of 80 mass percent phosphoric acid solution into the three-neck flask, continuing to carry out condensation reflux for 7h to obtain a light green product, putting the light green product into a muffle furnace, heating to 450 ℃, and calcining for 5h to obtain green powder; putting 30g of fermentation fuel into a conical flask filled with 120mL of sodium hydroxide solution, heating to 70 ℃, introducing air into the conical flask at the aeration rate of 80mL/min, aerating for 15min, keeping the temperature for reaction for 30min, pouring the product in the conical flask into a high-pressure reaction kettle, adding 5g of sodium furoate, 1.0g of the green powder and 15g of dry ice into the high-pressure reaction kettle, heating to 90 ℃, keeping the temperature for reaction for 8h, and obtaining the oxygen-containing catalytic fuel; mixing isopropanol and methanol according to a volume ratio of 1: 3 to obtain liquid fuel, mixing pulverized coal, micron magnesium powder with the particle size of 40 microns and oxygen-containing catalytic fuel according to a mass ratio of 5: 1: 10 to obtain solid fuel, doping the solid fuel into the liquid fuel, stirring and dispersing at a rotating speed of 500r/min, and controlling the mass of the solid fuel to be 10% of that of the liquid fuel to obtain the catalytic oxygen release clean fuel.

Comparative example

The catalytic oxygen release clean fuel prepared by the invention and the catalytic oxygen release clean fuel in the comparative example are subjected to performance detection by taking the catalytic oxygen release clean fuel produced by Guangdong company as the comparative example, and the detection results are shown in Table 1:

the test method comprises the following steps:

the heat value test is carried out according to the standard GB T384-2002;

the burning rate test adopts a burning rate tester for detection;

the thermal efficiency test adopts a boiler thermal efficiency test method to detect;

the sulfur dioxide emission test is carried out by adopting a sulfur dioxide tester;

and a nitrogen oxide detector is adopted for detecting the nitrogen oxide emission.

TABLE 1 clean Fuel Performance test results

According to the data, the catalytic oxygen-releasing clean fuel prepared by the invention has high combustion rate reaching 99%, high heat value, low sulfur dioxide discharge amount and nitrogen oxide discharge amount, low harmful gas discharge amount, no environmental pollution and wide application prospect.

Claims

1. A preparation method of a catalytic oxygen release clean fuel is characterized by comprising the following specific preparation steps:

(1) adding 100-120 g of tantalum hydroxide and 1.5-2.0L of phosphoric acid solution into a stirring kettle, starting a stirrer, stirring and reacting at a rotating speed of 200-250 r/min for 2-3 days, aging at room temperature to obtain aged sol, performing suction filtration on the aged sol, removing filtrate to obtain a filter cake, washing the filter cake with deionized water until the washing solution is neutral, placing the washed filter cake into a vacuum drying box, drying to obtain dried solid, placing the dried solid into a mortar for grinding, sieving to obtain powder, placing the powder into a muffle furnace, heating and calcining to obtain a solid acid catalyst; the phosphoric acid solution is 10% in mass fraction, the aging time is 12-15 hours at room temperature, the set temperature of a vacuum drying oven is 110-120 ℃, the drying time is 2-3 hours, the screened size is 200 meshes, the temperature after heating is 300-350 ℃, and the calcining time is 3-4 hours;

(2) putting 20-30 parts of straws, 30-35 parts of grass seed hulls and 20-25 parts of corncobs into a fermentation tank, adding 30-40 parts of deionized water, 20-30 parts of sulfuric acid solution and 4-5 parts of clostridium thermocellum powder into the fermentation tank, sealing the fermentation tank, controlling the fermentation temperature to be 40-45 ℃, and sealing and fermenting to obtain a fermentation product; the mass fraction of the sulfuric acid solution is 5%, the fermentation temperature is controlled to be 40-45 ℃, and the sealed fermentation time is 6-7 days;

(3) filtering the fermentation product to remove filter residues to obtain fermentation liquor, mixing 200-250 mL of fermentation liquor with a solid acid catalyst, putting the mixture into a reaction kettle, vacuumizing the reaction kettle, heating, raising the temperature, starting a stirrer, stirring and reacting at a rotating speed of 300-350 r/min for 3-4 hours to obtain a reaction product, and filtering and separating the reaction product to obtain a fermentation fuel; the vacuum degree of the reaction kettle is 80-100 Pa after the reaction kettle is vacuumized, and the temperature is 150-160 ℃ after the reaction kettle is heated;

(4) putting 4-5 g of vanadium pentoxide, 15-20 mL of isobutanol and 8-10 mL of benzyl alcohol into a three-neck flask with a condensation reflux device, heating, adding 10-12 mL of phosphoric acid solution into the three-neck flask after condensation reflux, continuing condensation reflux to obtain a light green product, putting the light green product into a muffle furnace, heating, and heating until calcination is carried out to obtain green powder; the temperature of the three-neck flask after being heated is 80-90 ℃, the condensation reflux time is 12-13 h, the mass fraction of the phosphoric acid solution is 80%, the continuous condensation reflux time is 6-7 h, the temperature of the muffle furnace after being heated is 400-450 ℃, and the calcination time is 4-5 h;

(5) putting 20-30 g of fermentation fuel into a conical flask filled with 100-120 mL of sodium hydroxide solution, heating and raising the temperature, introducing air into the conical flask, after heat preservation reaction, pouring a product in the conical flask into a high-pressure reaction kettle, adding 4-5 g of sodium furoate, 0.8-1.0 g of the green powder and 10-15 g of dry ice into the high-pressure reaction kettle, heating and raising the temperature, and performing heat preservation reaction to obtain oxygen-containing catalytic fuel; the conical flask is heated to 60-70 ℃, the air introducing speed is 70-80 mL/min, the air introducing duration is 10-15 min, the heat preservation reaction time is 20-30 min, the high-pressure reaction kettle is heated to 80-90 ℃ and the heat preservation reaction time is 7-8 h;

(6) mixing isopropanol and methanol to obtain liquid fuel, mixing pulverized coal, micron magnesium powder and oxygen-containing catalytic fuel to obtain solid fuel, adding the solid fuel into the liquid fuel, stirring and dispersing to obtain catalytic oxygen release clean fuel, wherein the mixing volume ratio of the isopropanol to the methanol is 1: 3; the particle size of the pulverized coal and the micron magnesium powder is 20-40 mu m, the mixing mass ratio of the pulverized coal, the micron magnesium powder and the oxygen-containing catalytic fuel is 5: 1: 10, the stirring and dispersing rotating speed is 400-500 r/min, and the mass of the solid fuel is controlled to be 5-10% of that of the liquid fuel.