Natural gas synergist

Abstract

The invention relates to the technical field of gas synergists, in particular to a natural gas synergist, which is prepared from the following raw materials in parts by weight: 30 to 35 parts of methylcyclohexane, 20 to 25 parts of isooctane, 15 to 20 parts of absolute ethyl alcohol, 12 to 15 parts of modified amyl nitrate, 8 to 10 parts of functional auxiliary agents, 3 to 5 parts of modified cerium naphthenate and 1 to 3 parts of auxiliary agents. Nitro in the molecular structure is decomposed in the combustion process to generate a large amount of active oxygen and nitrogen dioxide, the concentration of an oxidizing agent for a combustion reaction is remarkably increased, modified cerium naphthenate and manganous nitrate form nano-scale catalytic particles through ultrasonic dispersion, the nano-scale catalytic particles with high specific surface area can adsorb natural gas molecules and oxygen, the combustion activation energy is reduced, and the combustion efficiency is improved. Under the synergistic effect of multiple effects, the oxidation reaction rate during natural gas combustion is greatly increased, energy release is more violent, and therefore the combustion temperature of natural gas can be increased.

Description

Technical Field

[0001] The present invention relates to the technical field of gas synergists, in particular to a natural gas synergist. Background Art

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere and lithosphere, including oilfield gas, gas field gas, mud volcano gas, coalbed methane and biogas. During the use of existing natural gas, combustion additives need to be added to catalyze, crack, and support combustion of the base gas, and change the combustion method of the gas.

[0003] In the prior art, for example, Chinese patent CN106433837A discloses a natural gas synergist composed of the following ingredients by mass fraction: 1-3 parts of methylpentane, 2-4 parts of cycloheptane, 1-2 parts of petroleum ether, 2-4 parts of pentacycloalkanes, 3-5 parts of methylbutane, 1-2 parts of isoheptane, 1-3 parts of butane, and 2-4 parts of ferrocene. This invention is non-toxic, and the gas formed by mixing with natural gas has a low explosion limit and does not emit black smoke, effectively reducing the health hazards caused by inhaling black smoke and dust.

[0004] In the above patent, the combustion gas mixed with natural gas has a low explosion limit and does not emit black smoke, effectively reducing the health hazards caused by inhaling black smoke and dust. However, due to the low oxygen release efficiency and insufficient catalytic activity, the flame temperature of the natural gas combustion after mixing is relatively low.

[0005] Based on this, the present invention provides a natural gas synergist. Summary of the Invention

[0006] The purpose of the present invention is to provide a natural gas synergist. After the natural gas synergist prepared by the present invention is mixed with natural gas, the natural gas has a higher combustion temperature during combustion and has excellent environmental protection, thereby effectively improving the performance of natural gas.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a natural gas synergist, comprising the following raw materials in parts by weight: 30-35 parts of methylcyclohexane, 20-25 parts of isooctane, 15-20 parts of anhydrous ethanol, 12-15 parts of modified amyl nitrate, 8-10 parts of functional additives, 3-5 parts of modified cerium cyclohexane and 1-3 parts of auxiliary agent.

[0008] Preferably, the modified amyl nitrate is prepared by the following method: amyl nitrate, catalyst and solvent are weighed as needed, amyl nitrate and solvent are added to a reactor, stirred at 200-300 rpm for 5-10 minutes using a built-in stirring rod, the catalyst is added, and stirring is continued at 200-300 rpm for 3-5 minutes. The temperature is set to 80-100° C., and the reaction is stirred at 100-200 rpm for 2-4 hours to obtain a reaction liquid, and the reaction liquid is added to a refrigerated centrifuge for solid-liquid separation to obtain a reaction precipitate, the reaction precipitate is spread flat in a drying oven, and dried at 60-80° C. to constant weight to obtain modified amyl nitrate.

[0009] Preferably, the catalyst is copper nitrate, the solvent is anhydrous ethanol, and the speed of the refrigerated centrifuge in the modified amyl nitrate preparation method is set to 2000-3000 r / min, the duration is 10-15 minutes, and the temperature is set at 5-10°C.

[0010] Preferably, the mass ratio of the amyl nitrate, the catalyst and the solvent is 1:0.03:4.

[0011] Preferably, the modified cerium cyclopentaneate is prepared by the following method: cerium cyclopentaneate, surfactant, dopant and toluene are weighed as needed, cerium cyclopentaneate and toluene are added to an ultrasonic reactor, the power is set to 100-200W for overspeed treatment for 15-20 minutes, the surfactant and dopant are added, and the mixture is stirred at 200-300rpm by a magnetic stirrer for 10-12 minutes. The temperature is set to 120-150°C and the reaction is carried out for 3-5 hours to obtain a mixed solution. The mixed solution is placed in a centrifuge for centrifugal separation to obtain a cerium cyclopentaneate precipitate. The cerium cyclopentaneate precipitate is placed in a drying oven and dried at 60-80°C to constant weight to obtain the modified cerium cyclopentaneate.

[0012] Preferably, the surfactant is sorbitan monooleate, the dopant is manganese nitrate, and the mass ratio of the cerium cyclohexaneate, the surfactant, the dopant and toluene is 1:0.1:0.05:5.

[0013] Preferably, in the modified cerium naphthenate preparation method, the rotation speed of the centrifuge is set to 6000 r / min and the process is continued at room temperature for 20 to 25 minutes.

[0014] Preferably, n-hexane and n-heptane are selected and put into a stirring tank, the mass ratio of n-hexane to n-heptane is 1:(0.8-1.2), and stirring is continued at 50-200 r / min for 30-50 minutes to prepare a functional additive.

[0015] Preferably, the auxiliary agent is dimethyl carbonate or di-tert-butyl peroxide.

[0016] A method for preparing a natural gas synergist comprises the following steps:

[0017] Step 1: Add methylcyclohexane, isooctane and anhydrous ethanol to the reactor in sequence, and stir at room temperature for 10 to 15 minutes at 200 to 300 rpm using a built-in stirrer;

[0018] Step 2: Slowly add the modified amyl nitrate dropwise to the reaction kettle in step 1, while stirring at room temperature at 100-200 rpm for 20-30 minutes using a built-in stirrer;

[0019] Step 3: Add the functional additive, auxiliary agent and modified cerium cyclohexaneate to the reactor in step 2, set the temperature to 40-50°C, and stir at 150-250 rpm for 2-3 hours;

[0020] Step 4: After cooling to room temperature, filter, vacuum degas, and store in the dark to complete the preparation of the natural gas enhancer.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the preparation of the natural gas synergist, the present invention uses copper nitrate as a catalyst to modify amyl nitrate. The nitro group in the molecular structure decomposes during combustion to produce a large amount of active oxygen and nitrogen dioxide, significantly increasing the oxidant concentration of the combustion reaction. Dimethyl carbonate, as a high-oxygen auxiliary agent, has a low boiling point that can directly increase the oxygen-carbon ratio of the fuel system, promoting the formation of a more uniform combustible mixture between the fuel and air. Modified cerium naphthenate is ultrasonically dispersed and reacted with manganese nitrate to form nano-scale catalytic particles. The high specific surface area of ​​the particles can adsorb natural gas molecules and oxygen, reducing the combustion activation energy and accelerating the free radical chain reaction. Through the synergistic effects of these multiple effects, the oxidation reaction rate during natural gas combustion is greatly increased, energy release is more intense, and thus the combustion temperature of the natural gas can be increased.

[0023] 2. The present invention forms a stable solvent system by using anhydrous ethanol and n-hexane and n-heptane in the functional additives to ensure uniform dispersion of the components and avoid incomplete combustion caused by local uneven concentrations. At the same time, the modified cerium cyclohexane acid is used as a rare earth catalyst, and its cerium ion redox cycle can accelerate the reaction rate of carbon monoxide to carbon monoxide. At the same time, the catalytic effect of the nanoparticles optimizes the combustion reaction path; the oxygen content of dimethyl carbonate can supplement the oxygen deficiency in the early stage of combustion. Especially under fuel-rich combustion conditions, the carbon utilization rate during the combustion process is significantly improved, thereby improving energy utilization.

[0024] 3. In the present invention, the active oxygen generated by the decomposition of modified amyl nitrate promotes the complete combustion of natural gas and reduces carbon monoxide emissions caused by incomplete combustion. The catalytic effect of modified cerium cyclohexaneate accelerates the complete oxidation of hydrocarbons into carbon dioxide and water, further reducing the generation of soot and volatile organic pollutants. At the same time, the redox cycle of cerium ions can adsorb and convert nitrogen oxides generated during the combustion process, reducing them to harmless nitrogen, significantly reducing pollutant emissions and achieving environmental protection goals. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that the raw materials used in the following experiments are all commercially available raw materials.

[0027] Example 1:

[0028] A natural gas synergist is composed of the following raw materials in parts by weight: 30 parts of methylcyclohexane, 20 parts of isooctane, 15 parts of anhydrous ethanol, 12 parts of modified amyl nitrate, 8 parts of functional additives, 3 parts of modified cerium cyclohexane and 1 part of auxiliary agent.

[0029] Modified amyl nitrate was prepared by the following method: amyl nitrate, catalyst, and solvent were weighed as needed, added to a reactor, stirred at 200 rpm for 5 minutes using a built-in stirring rod, added the catalyst, continued stirring at 200 rpm for 3 minutes, set the temperature to 80°C, and stirred at 100 rpm for 2 hours to obtain a reaction solution, added the reaction solution to a refrigerated centrifuge for solid-liquid separation to obtain a reaction precipitate, spread the reaction precipitate in a drying oven, and dried at 60°C to constant weight to obtain modified amyl nitrate.

[0030] The catalyst is copper nitrate, the solvent is anhydrous ethanol, and the speed of the refrigerated centrifuge in the preparation method of modified amyl nitrate is set to 2000 r / min, the duration is 10 minutes, and the temperature is set at 5°C.

[0031] The mass ratio of amyl nitrate, catalyst and solvent is 1:0.03:4.

[0032] The modified cerium cyclopentaneate is prepared by the following method: cerium cyclopentaneate, a surfactant, a dopant and toluene are weighed as needed, the cerium cyclopentaneate and toluene are added to an ultrasonic reactor, the power is set to 100W and the ultra-speed treatment is performed for 15 minutes, the surfactant and the dopant are added, and the mixture is stirred at 200 rpm for 10 minutes with a magnetic stirrer. The temperature is set to 120°C and the reaction is carried out for 3 hours to obtain a mixed solution. The mixed solution is placed in a centrifuge for centrifugal separation to obtain a cerium cyclopentaneate precipitate. The cerium cyclopentaneate precipitate is placed in a drying oven and dried at 60°C to constant weight to obtain the modified cerium cyclopentaneate.

[0033] The surfactant is sorbitan monooleate, the dopant is manganese nitrate, and the mass ratio of cerium cyclohexaneate, the surfactant, the dopant and toluene is 1:0.1:0.05:5.

[0034] In the preparation method of modified cerium cyclohexaneate, the rotation speed of the centrifuge is set to 6000 r / min and the centrifuge is continued at room temperature for 20 minutes.

[0035] Select n-hexane and n-heptane and put them into a stirring tank with a mass ratio of n-hexane to n-heptane of 1:0.8, and stir at 50 r / min for 30 minutes to prepare a functional additive.

[0036] The auxiliary agent is dimethyl carbonate.

[0037] A method for preparing a natural gas synergist comprises the following steps:

[0038] Step 1: Methylcyclohexane, isooctane and anhydrous ethanol were added to the reactor in sequence and stirred at 200 rpm for 10 min at room temperature using a built-in stirrer;

[0039] Step 2: Slowly add the modified amyl nitrate dropwise to the reaction kettle in step 1, while stirring at room temperature at 100 rpm using a built-in stirrer for 20 minutes;

[0040] Step 3: Add the functional additive, auxiliary agent and modified cerium cyclohexaneate to the reactor in step 2, set the temperature to 40°C, and stir at 150 rpm for 2 hours;

[0041] Step 4: After cooling to room temperature, filter, vacuum degas, and store in the dark to complete the preparation of the natural gas enhancer.

[0042] Example 2:

[0043] A natural gas synergist is composed of the following raw materials in parts by weight: 33 parts of methylcyclohexane, 23 parts of isooctane, 18 parts of anhydrous ethanol, 13 parts of modified amyl nitrate, 9 parts of functional additives, 4 parts of modified cerium cyclohexane and 2 parts of auxiliary agents.

[0044] Modified amyl nitrate was prepared by the following method: amyl nitrate, catalyst, and solvent were weighed as needed, added to a reactor, stirred at 250 rpm for 8 minutes using a built-in stirring rod, added the catalyst, continued stirring at 250 rpm for 4 minutes, set the temperature to 90°C, and stirred at 150 rpm for 3 hours to obtain a reaction solution, added the reaction solution to a refrigerated centrifuge for solid-liquid separation to obtain a reaction precipitate, spread the reaction precipitate in a drying oven, and dried at 70°C to constant weight to obtain modified amyl nitrate.

[0045] The catalyst is copper nitrate, the solvent is anhydrous ethanol, and the speed of the refrigerated centrifuge in the preparation method of modified amyl nitrate is set to 2500 r / min, the duration is 13 minutes, and the temperature is set at 7°C.

[0046] The mass ratio of amyl nitrate, catalyst and solvent is 1:0.03:4.

[0047] The modified cerium cyclopentaneate is prepared by the following method: cerium cyclopentaneate, surfactant, dopant and toluene are weighed as needed, cerium cyclopentaneate and toluene are added to an ultrasonic reactor, the power is set to 150W and the ultra-speed treatment is carried out for 18 minutes, the surfactant and dopant are added, and the mixture is stirred at 250 rpm for 11 minutes using a magnetic stirrer. The temperature is set to 135°C and the reaction is carried out for 4 hours to obtain a mixed solution. The mixed solution is placed in a centrifuge for centrifugal separation to obtain a cerium cyclopentaneate precipitate. The cerium cyclopentaneate precipitate is placed in a drying oven and dried at 70°C to constant weight to obtain the modified cerium cyclopentaneate.

[0048] The surfactant is sorbitan monooleate, the dopant is manganese nitrate, and the mass ratio of cerium cyclohexaneate, the surfactant, the dopant and toluene is 1:0.1:0.05:5.

[0049] In the preparation method of modified cerium cyclohexaneate, the rotation speed of the centrifuge is set to 6000 r / min and the centrifuge is continued at room temperature for 22 minutes.

[0050] Select n-hexane and n-heptane and put them into a stirring tank with a mass ratio of n-hexane to n-heptane being 1:1, and stir continuously at 120 r / min for 40 minutes to prepare a functional additive.

[0051] The auxiliary agent is dimethyl carbonate.

[0052] A method for preparing a natural gas synergist comprises the following steps:

[0053] Step 1: Methylcyclohexane, isooctane and anhydrous ethanol were added to the reactor in sequence and stirred at 250 rpm for 12 min at room temperature using a built-in stirrer;

[0054] Step 2: Slowly add the modified amyl nitrate dropwise to the reaction kettle in step 1, and stir at room temperature at 150 rpm for 25 minutes using a built-in stirrer;

[0055] Step 3: Add the functional additive, auxiliary agent and modified cerium cyclohexaneate to the reactor in step 2, set the temperature to 45°C, and stir at 200 rpm for 2.5 hours;

[0056] Step 4: After cooling to room temperature, filter, vacuum degas, and store in the dark to complete the preparation of the natural gas enhancer.

[0057] Example 3:

[0058] A natural gas synergist is composed of the following raw materials in parts by weight: 35 parts of methylcyclohexane, 25 parts of isooctane, 20 parts of anhydrous ethanol, 15 parts of modified amyl nitrate, 10 parts of functional additives, 5 parts of modified cerium cyclohexane and 3 parts of auxiliary agents.

[0059] Modified amyl nitrate was prepared by the following method: amyl nitrate, catalyst, and solvent were weighed as needed, added to a reactor, stirred at 300 rpm for 10 minutes using a built-in stirring rod, added the catalyst, continued stirring at 300 rpm for 5 minutes, set the temperature to 100°C, and stirred at 200 rpm for 4 hours to obtain a reaction solution, added the reaction solution to a refrigerated centrifuge for solid-liquid separation to obtain a reaction precipitate, spread the reaction precipitate in a drying oven, and dried at 80°C to constant weight to obtain modified amyl nitrate.

[0060] The catalyst is copper nitrate, the solvent is anhydrous ethanol, and the speed of the refrigerated centrifuge in the preparation method of modified amyl nitrate is set to 3000 r / min, the duration is 15 minutes, and the temperature is set at 10°C.

[0061] The mass ratio of amyl nitrate, catalyst and solvent is 1:0.03:4.

[0062] The modified cerium cyclopentaneate is prepared by the following method: cerium cyclopentaneate, a surfactant, a dopant and toluene are weighed as needed, the cerium cyclopentaneate and toluene are added to an ultrasonic reactor, the power is set to 200W and the overspeed treatment is performed for 20 minutes, the surfactant and the dopant are added, and the mixture is stirred at 300 rpm for 12 minutes with a magnetic stirrer. The temperature is set to 150°C and the reaction is carried out for 5 hours to obtain a mixed solution. The mixed solution is placed in a centrifuge for centrifugal separation to obtain a cerium cyclopentaneate precipitate. The cerium cyclopentaneate precipitate is placed in a drying oven and dried at 80°C to constant weight to obtain the modified cerium cyclopentaneate.

[0063] The surfactant is sorbitan monooleate, the dopant is manganese nitrate, and the mass ratio of cerium cyclohexaneate, the surfactant, the dopant and toluene is 1:0.1:0.05:5.

[0064] In the preparation method of modified cerium cyclopentaneate, the rotation speed of the centrifuge is set to 6000 r / min and the centrifuge is continued at room temperature for 25 minutes.

[0065] Select n-hexane and n-heptane and put them into a stirring tank with a mass ratio of n-hexane to n-heptane of 1:1.2. Stir at 200 r / min for 50 minutes to prepare a functional additive.

[0066] The auxiliary agent is dimethyl carbonate.

[0067] A method for preparing a natural gas synergist comprises the following steps:

[0068] Step 1: Methylcyclohexane, isooctane and anhydrous ethanol were added to the reactor in sequence and stirred at 300 rpm for 15 min at room temperature using a built-in stirrer;

[0069] Step 2: Slowly add the modified amyl nitrate dropwise to the reaction kettle in step 1 while stirring at 200 rpm for 30 minutes at room temperature using a built-in stirrer;

[0070] Step 3: Add the functional additive, auxiliary agent and modified cerium cyclohexaneate to the reactor in step 2, set the temperature to 50°C, and stir at 250 rpm for 3 hours;

[0071] Step 4: After cooling to room temperature, filter, vacuum degas, and store in the dark to complete the preparation of the natural gas enhancer.

[0072] Comparative Example 1: The difference between this comparative example and Experiment 1 is that amyl nitrate was not modified in this comparative example.

[0073] Comparative Example 2: The difference between this comparative example and Experiment 1 is that the cerium cyclohexaneate was not modified in this comparative example.

[0074] Comparative Example 3: The difference between this comparative example and Experiment 1 is that no auxiliary agent is added when preparing the natural gas synergist in this comparative example.

[0075] Comparative Example 4: This comparative example differs from Experiment 1 in that amyl nitrate and cerium cyclohexaneate were not modified in this comparative example.

[0076] Performance test: The natural gas enhancer treated in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 was mixed with natural gas (the natural gas enhancer accounted for 0.4% by weight of the natural gas) and subjected to performance test;

[0077] The performance tests include:

[0078] Adiabatic combustion temperature test: Using the constant volume combustion bomb method (ASTM D240), the natural gas and air equivalence ratio after mixing is 1:1, the initial pressure is 0.1 MPa, and the maximum flame temperature under adiabatic conditions is measured using a thermocouple or infrared thermal imager;

[0079] CO emission test: Flue gas analyzer (GB13271), after the combustion products of mixed natural gas are condensed and dehydrated, dry flue gas is extracted and the CO concentration is detected using a non-dispersive infrared (NDIR) sensor:

[0080] Carbon deposit test: Take 10 mg of the combustion residue sample of the mixed natural gas, place it in a crucible, and heat it to 800°C at 10°C / min in an air atmosphere. Monitor the mass change. The mass of the residue is the carbon deposit amount.

[0081] The obtained test data are recorded in the following table:

[0082]

[0083]

[0084] It can be seen that the adiabatic combustion temperature, CO emission and carbon deposition amount of the natural gas enhancers prepared in Comparative Examples 1, 2, 3 and 4 and mixed with natural gas are higher than those in Examples 1, 2 and 3; this shows that: when preparing the natural gas enhancer, after amyl nitrate is catalytically modified by copper nitrate, the nitro group in the molecular structure decomposes during the combustion process to produce a large amount of active oxygen and nitrogen dioxide, significantly increasing the oxidant concentration of the combustion reaction; dimethyl carbonate is used as a high oxygen content auxiliary agent, and its low boiling point characteristic can directly increase the oxygen-carbon ratio of the fuel system, promote the fuel and air to form a more uniform combustible mixture; modified cerium cyclopentaneate is formed into nano-scale catalytic particles by ultrasonic dispersion and manganese nitrate, and its high specific surface area can adsorb natural gas molecules and oxygen, reduce the combustion activation energy, and accelerate the free radical chain reaction. Under the synergistic effect of multiple effects, the oxidation reaction rate during natural gas combustion is greatly improved, and the energy release is more intense, thereby increasing the combustion temperature of natural gas; through anhydrous ethanol and n-hexane in the functional additive It forms a stable solvent system with n-heptane to ensure uniform dispersion of all components and avoid incomplete combustion caused by local uneven concentration. At the same time, the modified cerium cyclopentaneate serves as a rare earth catalyst, and its cerium ion redox cycle can accelerate the reaction rate of carbon monoxide to carbon monoxide. At the same time, the catalytic effect of the nanoparticles optimizes the combustion reaction path; the oxygen content of dimethyl carbonate can supplement the insufficient oxygen in the initial stage of combustion, especially under fuel-rich combustion conditions, the carbon utilization rate in the combustion process is significantly improved, and the energy utilization rate is improved; the active oxygen produced by the decomposition of modified amyl nitrate promotes the complete combustion of natural gas and reduces carbon monoxide emissions caused by incomplete combustion. The catalytic effect of modified cerium cyclopentaneate accelerates the complete oxidation of hydrocarbons to carbon dioxide and water, further reducing the generation of carbon soot and volatile organic pollutants. At the same time, the redox cycle of cerium ions can adsorb and convert nitrogen oxides produced during combustion, reducing them to harmless nitrogen, significantly reducing pollutant emissions and achieving environmental protection goals.

[0085] Comparing and analyzing the relevant data in the table shows that the natural gas synergist, when mixed with natural gas, achieves a higher combustion temperature during combustion, is environmentally friendly, and effectively improves the performance of natural gas. This demonstrates that the natural gas synergist provided by the present invention has a broader market prospect and is more suitable for promotion.

[0086] Throughout this specification, references to terms such as "one embodiment," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0087] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A natural gas synergist, characterized in that: The invention is composed of the following raw materials in parts by weight: 30-35 parts of methylcyclohexane, 20-25 parts of isooctane, 15-20 parts of anhydrous ethanol, 12-15 parts of modified amyl nitrate, 8-10 parts of functional additives, 3-5 parts of modified cerium cyclohexane and 1-3 parts of auxiliary agents.

2. A natural gas synergist according to claim 1, characterized in that: The modified amyl nitrate is prepared by the following method: amyl nitrate, a catalyst and a solvent are weighed as needed, the amyl nitrate and the solvent are added to a reaction kettle, stirred at 200-300 rpm for 5-10 minutes using a built-in stirring rod, the catalyst is added, stirring is continued at 200-300 rpm for 3-5 minutes, the temperature is set to 80-100° C., and stirring is carried out at 100-200 rpm for 2-4 hours to obtain a reaction liquid, the reaction liquid is added to a refrigerated centrifuge for solid-liquid separation to obtain a reaction precipitate, the reaction precipitate is spread out in a drying oven, and dried at 60-80° C. to constant weight to obtain the modified amyl nitrate.

3. A natural gas synergist according to claim 2, characterized in that: The catalyst is copper nitrate, the solvent is anhydrous ethanol, and the speed of the refrigerated centrifuge in the modified amyl nitrate preparation method is set at 2000-3000 r / min, the duration is 10-15 minutes, and the temperature is set at 5-10°C.

4. A natural gas synergist according to claim 2, characterized in that: The mass ratio of the amyl nitrate, the catalyst and the solvent is 1:0.03:

4.

5. A natural gas synergist according to claim 1, characterized in that: The modified cerium cyclopentaneate is prepared by the following method: cerium cyclopentaneate, a surfactant, a dopant and toluene are weighed as needed, the cerium cyclopentaneate and toluene are added into an ultrasonic reactor, the power is set to 100-200W and overspeed treatment is performed for 15-20 minutes, the surfactant and the dopant are added, the mixture is stirred at 200-300 rpm for 10-12 minutes using a magnetic stirrer, the temperature is set to 120-150°C, and the reaction is carried out for 3-5 hours to obtain a mixed solution, the mixed solution is placed in a centrifuge for centrifugal separation to obtain a cerium cyclopentaneate precipitate, the cerium cyclopentaneate precipitate is placed in a drying oven, and dried at 60-80°C to constant weight to obtain the modified cerium cyclopentaneate.

6. A natural gas synergist according to claim 5, characterized in that: The surfactant is sorbitan monooleate, the dopant is manganese nitrate, and the mass ratio of the cerium cyclohexaneate, the surfactant, the dopant and toluene is 1:0.1:0.05:

5.

7. A natural gas synergist according to claim 5, characterized in that: In the modified cerium naphthenate preparation method, the rotation speed of the centrifuge is set to 6000 r / min and the centrifuge is continued at room temperature for 20 to 25 minutes.

8. A natural gas synergist according to claim 1, characterized in that: The functional additive is prepared by the following method: n-hexane and n-heptane are selected and put into a stirring tank, the mass ratio of the n-hexane to the n-heptane is 1:(0.8-1.2), and stirring is continued at 50-200 r / min for 30-50 minutes to prepare the functional additive.

9. A natural gas synergist according to claim 1, characterized in that: The auxiliary agent is dimethyl carbonate.

10. A method for preparing a natural gas synergist according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Add methylcyclohexane, isooctane and anhydrous ethanol to the reactor in sequence, and stir at room temperature for 10 to 15 minutes at 200 to 300 rpm using a built-in stirrer; Step 2: Slowly add the modified amyl nitrate dropwise to the reaction kettle in step 1, while stirring at room temperature at 100-200 rpm for 20-30 minutes using a built-in stirrer; Step 3: Add the functional additive, auxiliary agent and modified cerium cyclohexaneate to the reactor in step 2, set the temperature to 40-50°C, and stir at 150-250 rpm for 2-3 hours; Step 4: After cooling to room temperature, filter, vacuum degas, and store in the dark to complete the preparation of the natural gas enhancer.

Images