阅读说明：本技术 一种甲醇燃料及其制备方法 (methanol fuel and preparation method thereof ) 是由 王胜杰 于 2019-09-19 设计创作，主要内容包括：本发明公开了甲醇燃料,涉及燃料制备技术领域,按体积分数计,包括甲醇60-85％,复配添加剂1-3％,低温冷启动改善组分10-20％和馏程改善组分4-20％；本发明还提供了一种甲醇燃料的制备方法,包括：(1)将复配添加剂加入到甲醇中,在常温下搅拌均匀后静置30-35mins得到甲醇溶液；(2)将低温冷启动组分和馏程改善组分混合均匀后,加入步骤S100得到的甲醇溶液中,在常温下搅拌均匀并静置30-35mins,即得透明、无色或浅黄色的甲醇燃料。本发明实现了一种不需添加汽油的甲醇燃料,产品除氧含量和甲醇含量指标外,其余15项指标均达到GB179390-2016《车用汽油》标准,可直接接替代汽油使用。(the invention discloses a methanol fuel, which relates to the technical field of fuel preparation, and comprises 60-85% of methanol, 1-3% of compound additive, 10-20% of low-temperature cold start improving component and 4-20% of distillation range improving component by volume fraction; the invention also provides a preparation method of the methanol fuel, which comprises the following steps: (1) adding the compound additive into methanol, stirring uniformly at normal temperature, and standing for 30-35mins to obtain a methanol solution; (2) and (3) uniformly mixing the low-temperature cold start component and the distillation range improving component, adding the mixture into the methanol solution obtained in the step (S100), uniformly stirring at normal temperature, and standing for 30-35mins to obtain the transparent, colorless or light yellow methanol fuel. The invention realizes a methanol fuel without adding gasoline, the other 15 indexes of the product except the oxygen content and the methanol content reach the GB179390-2016 motor gasoline standard, and the methanol fuel can be directly used to replace gasoline.)

1. a methanol fuel, comprising, in volume fractions:

60-85% of methanol, 1-3% of compound additive, 10-20% of low-temperature cold start improving component and 4-20% of distillation range improving component;

Wherein the compound additive comprises a cosolvent, a corrosion inhibitor and a dissolution-assisting stabilizer; the cosolvent comprises isomeric alcohol consisting of isopropanol and tert-butanol; the corrosion inhibitor is a mixture of benzotriazole and sodium dodecyl benzene sulfonate with the mass ratio of 0.5-2: 1; the solubilizing stabilizer is fatty acid amine ester, and the fatty acid amine ester is obtained from a product of biodiesel prepared from cottonseed oil;

wherein the volume ratio of the cosolvent to the corrosion inhibitor is 45-55%, and the density of the corrosion inhibitor is 0.01-0.03 g/ml;

The low-temperature cold start improving component comprises any one or any combination of petroleum ether, naphtha and n-heptane;

The distillation range improving component comprises any one or any combination of petroleum ether, 120# solvent or 260# solvent.

2. the methanol fuel of claim 1, wherein preferably the hydrotropic stabilizer is prepared by:

s100, preparing a solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst;

S200, preparing fatty acid methyl ester;

s300, preparing a solubilizing stabilizer.

3. the methanol fuel of claim 2, wherein the step S100 further comprises:

s101, mixing a Ce (NO3)3 solution and a ZrO (NO3)2 solution according to the molar ratio of 0.5-2 in each 100ml, adding 45-50 g of pseudo-boehmite, uniformly mixing, and standing for 90-120 mins, wherein the concentrations of the Ce (NO3)3 solution and the ZrO (NO3)2 solution are 0.15-0.25 g/ml;

s102, drying the solution obtained in the step S101, and continuously calcining the obtained product at 600-650 ℃ for 4-6h to obtain a solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst;

s103, grinding the solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst in a ball mill pot by using zirconium balls for 3.5-4.5 hours for later use.

4. the methanol fuel of claim 2, wherein the step S200 further comprises:

s201, mixing refined cottonseed oil and methanol according to a molar ratio of 1: 6-8, adding a ground solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst, and reacting at 60-80 ℃ for 60-80 mins to obtain a mixed solution;

s202, extracting the upper yellow transparent solution of the mixed solution obtained in the step S201 to obtain biodiesel, wherein the biodiesel is a mixture of fatty acid methyl ester and methanol;

S203, distilling, washing and drying the biodiesel extracted in the step S202 to obtain yellow and transparent fatty acid methyl ester.

5. the methanol fuel of claim 2, wherein the step S300 further comprises:

Adding the fatty acid methyl ester prepared in the step S200 into a 200# solvent, adding the fatty acid methyl ester and triethanolamine according to the weight ratio of 0.5-1 to perform hydrolysis and saponification reactions, wherein the reaction temperature is 35-40 ℃, and the reaction time is 30-35 mins; and heating and evaporating the obtained solution after the reaction is finished to obtain fatty acid amine ester, wherein the obtained fatty acid amine ester is used as the solubilizing stabilizer.

6. The methanol fuel of claim 1, wherein the formulated additive is prepared by:

adding fatty acid amine ester into the isomeric alcohol, uniformly mixing, adding the corrosion inhibitor, uniformly stirring at normal temperature, and standing for 30-35mins to obtain the compound additive.

7. The methanol fuel of claim 6, wherein the volume ratio of the fatty acid amine ester to the corrosion inhibitor is 45-55%.

8. a method of producing a methanol fuel, the method comprising:

S100, adding the compound additive into methanol, stirring uniformly at normal temperature, and standing for 30-35mins to obtain a methanol solution;

And S200, uniformly mixing the low-temperature cold start component and the distillation range improving component, adding the mixture into the methanol solution obtained in the step S100, uniformly stirring at normal temperature, and standing for 30-35mins to obtain the transparent, colorless or light yellow methanol fuel.

9. the method of claim 8, wherein the methanol is 60-85%, the compound additive is 1-3%, the low temperature cold start improving component is 10-20%, and the distillation range improving component is 4-20% by volume fraction.

10. the method of claim 8, wherein the compounding additive comprises a co-solvent, a corrosion inhibitor, and a hydrotropic stabilizer; wherein the cosolvent comprises isomeric alcohol consisting of isopropanol and tert-butanol in a volume ratio of 1: 1; the corrosion inhibitor is a mixture of benzotriazole and sodium dodecyl benzene sulfonate with the weight ratio of 1: 1; the solubilizing stabilizer is fatty acid amine ester and is obtained from a product of preparing biodiesel from cottonseed oil;

Wherein the volume of the cosolvent and the corrosion inhibitor accounts for 45-55%, and the concentration of the corrosion inhibitor is 0.01-0.03 g/ml;

The low-temperature cold start improving component comprises one or more of petroleum ether, naphtha and n-heptane;

The distillation range improving component comprises one or more of petroleum ether, 120# solvent or 260# solvent.

11. a method of preparing a hydrotropic stabilizer, the method comprising the steps of:

s100, preparing a solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst;

S200, preparing fatty acid methyl ester;

S300, preparing a solubilizing stabilizer.

12. The manufacturing method according to claim 11, wherein the step S100 further includes:

S101, mixing a Ce (NO3)3 solution and a ZrO (NO3)2 solution according to the molar ratio of 0.5-2 in each 100ml, adding 45-50 g of pseudo-boehmite, uniformly mixing, and standing for 90-120 mins, wherein the concentrations of the Ce (NO3)3 solution and the ZrO (NO3)2 solution are 0.15-0.25 g/ml;

s102, drying the solution obtained in the step S101, and continuously calcining the obtained product at 600-650 ℃ for 4-6h to obtain a solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst;

S103, grinding the solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst in a ball mill pot by using zirconium balls for 3.5-4.5 hours for later use.

13. The manufacturing method according to claim 11, wherein the step S200 further includes:

s201, mixing refined cottonseed oil and methanol according to a molar ratio of 1: 6-8, adding a ground solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst, and reacting at 60-80 ℃ for 60-80 mins to obtain a mixed solution;

S202, extracting the upper yellow transparent solution of the mixed solution obtained in the step S201 to obtain biodiesel, wherein the biodiesel is a mixture of fatty acid methyl ester and methanol;

S203, distilling, washing and drying the biodiesel extracted in the step S202 to obtain yellow and transparent fatty acid methyl ester.

14. the manufacturing method according to claim 11, wherein the step S300 further includes:

adding the fatty acid methyl ester prepared in the step S200 into a 200# solvent, adding the fatty acid methyl ester and triethanolamine according to the weight ratio of 0.5-1 to perform hydrolysis and saponification reactions, wherein the reaction temperature is 35-40 ℃, and the reaction time is 30-35 mins; and heating and evaporating the obtained solution after the reaction is finished to obtain fatty acid amine ester, wherein the obtained fatty acid amine ester is used as the solubilizing stabilizer.

Technical Field

the invention relates to the field of biofuel, in particular to a methanol fuel and a preparation method thereof.

background

The methanol is used as a vehicle alternative fuel, has the characteristics of low carbon, high oxygen content and high octane number, is beneficial to full combustion, and can effectively improve the power of an engine. The development and application of methanol automobiles in China begin at the end of the last 70 th century, and after continuous exploration practice for more than 40 years, automobiles and engine manufacturing enterprises such as Jili automobiles, Shanxi heavy automobiles, Yutong automobiles, Yiqijing automobiles and the like have a methanol automobile proprietary technology, solve the key technical problems of corrosivity, cold start, swelling property and the like of methanol fuel, and have the methanol automobile autonomous development capability. Since 2012, the ministry of industry and informatization and relevant departments develop methanol automobile pilot plant work in Shanxi, Shanghai, Shanxi, Guizhou and Gansu 5 province cities, further scientifically and systematically verifies the properties of the methanol automobile such as applicability, reliability, economy, safety, environmental protection and the like which are of social concern, and lays an important foundation for popularization and application of the methanol automobile.

china has the characteristic of rich coal, oil and gas resources, the energy structure mainly takes coal as the main material, the external dependence of crude oil and natural gas resources is high, the external dependence of crude oil reaches 70% in 2018, and the external dependence of natural gas reaches 43%. While more than 40% of coal resources in China are high-sulfur coal, the high-sulfur low-quality coal is not suitable for being directly used as power generation or industrial fuel, but can be used for producing methanol, the coal-based methanol ratio in China is about 75%, and other raw materials such as coke oven gas, coal bed gas and the like can also be used for producing methanol. The domestic methanol productivity in 2017 is 8351 ten thousand tons, the yield is 6147 ten thousand tons, the operating rate is about 74 percent, and the state of excess productivity is achieved. The regional development of the methanol automobile is promoted by combining the intrinsic characteristics of resources in China and the current development situation of the methanol automobile, the regional development of the methanol automobile is in line with the national conditions of China, the advantages of coal resources in China are fully exerted, the transformation and the upgrade of the traditional industry are promoted, the green cycle development is promoted, the diversification of energy is realized, and the national energy safety is guaranteed.

methanol is used as fuel, compared with gasoline, the methanol gasoline has high combustion heat efficiency, low product cost and remarkably reduced emissions of HC/CO and the like. But also has the defects of difficult low-temperature cold start, low heat value, corrosiveness to metal and rubber plastic materials and the like.

In addition, methanol and gasoline can produce azeotropes, which tend to form vapor lock at high temperatures. In addition, the mutual solubility problem of methanol and gasoline is also a main technical difficulty for popularization and application. For the application problem of methanol fuel, the solution is mostly developed around methanol gasoline with different proportions.

Therefore, those skilled in the art have made efforts to develop a methanol fuel which is highly efficient in combustion heat, has a low product cost, can overcome the difficulty of cold start at low temperature, and does not require gasoline.

Disclosure of Invention

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a methanol fuel with high combustion heat efficiency and low product cost, which can overcome the difficulties of low-temperature cold start, does not need to add gasoline, and overcomes the defects of low calorific value and corrosivity to metal and pixel materials.

To achieve the above object, the present invention provides a methanol fuel comprising, in volume fraction:

60-85% of methanol, 1-3% of compound additive, 10-20% of low-temperature cold start improving component and 4-20% of distillation range improving component;

wherein the compound additive comprises a cosolvent, a corrosion inhibitor and a dissolution-assisting stabilizer; the cosolvent comprises isomeric alcohol consisting of isopropanol and tert-butanol; the corrosion inhibitor is a mixture consisting of benzotriazole and sodium dodecyl benzene sulfonate with the mass ratio of 0.5-2; the solubilizing stabilizer is fatty acid amine ester, and the fatty acid amine ester is obtained from a product of biodiesel prepared from cottonseed oil;

wherein the volume ratio of the cosolvent to the corrosion inhibitor is 45-55%, and the concentration of the corrosion inhibitor is 0.01-0.03 g/ml;

the low-temperature cold start improving component comprises any one or any combination of petroleum ether, naphtha and n-heptane;

the distillation range improving component comprises any one or any combination of petroleum ether, 120# solvent or 260# solvent.

the invention also provides a preparation method of the solubilizing stabilizer, which comprises the following steps:

s100, preparing a solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst;

s200, preparing fatty acid methyl ester;

S300, preparing a solubilizing stabilizer.

the invention also provides a preparation method of the compound additive, which comprises the following steps:

adding fatty acid amine ester into the isomeric alcohol, uniformly mixing, adding the corrosion inhibitor, uniformly stirring at normal temperature, and standing for 30-35mins to obtain the compound additive.

The invention also provides a preparation method of the methanol fuel, which comprises the following steps:

s100, adding the compound additive into methanol, stirring uniformly at normal temperature, and standing for 30-35mins to obtain a methanol solution;

and S200, uniformly mixing the low-temperature cold start component and the distillation range improving component, adding the mixture into the methanol solution obtained in the step S100, uniformly stirring at normal temperature, and standing for 30-35mins to obtain the transparent, colorless or light yellow methanol fuel.

compared with the prior art, the invention has the following technical advantages:

1) the methanol fuel disclosed by the invention does not contain strong carcinogenic substances such as benzene and xylene in raw materials, and the main raw materials are easy to obtain and low in cost;

2) The invention realizes a methanol fuel without adding gasoline, the other 15 indexes of the product except the oxygen content and the methanol content reach the GB179390-2016 motor gasoline standard, and the methanol fuel can be directly used to replace gasoline.

3) the product except the indexes of oxygen content and methanol content, the other 15 indexes all reach the GB179390-2016 automobile gasoline standard, and can be directly used to replace gasoline;

4) the methanol fuel can be mutually dissolved with gasoline in any proportion;

5) the road economic test result of the methanol fuel shows that the energy consumption per hundred kilometers is reduced compared with that of the 92# gasoline.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

drawings

Fig. 1 is a flow chart of a method for preparing methanol fuel according to a preferred embodiment of the present invention.

Detailed Description

the technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.

the invention discloses a methanol fuel, which comprises the following components in percentage by volume:

60-85% of methanol, 1-3% of compound additive, 10-20% of low-temperature cold start improving component and 4-20% of distillation range improving component;

wherein the compound additive comprises a cosolvent, a corrosion inhibitor and a dissolution-assisting stabilizer; the cosolvent comprises isomeric alcohol consisting of isopropanol and tert-butanol; the corrosion inhibitor is a mixture consisting of benzotriazole and sodium dodecyl benzene sulfonate with the mass ratio of 0.5-2; the solubilizing stabilizer is fatty acid amine ester, and the fatty acid amine ester is obtained from a product of biodiesel prepared from cottonseed oil;

Wherein the volume ratio of the cosolvent to the corrosion inhibitor is 45-55%, and the concentration of the corrosion inhibitor is 0.01-0.03 g/ml;

the low-temperature cold start improving component comprises any one or any combination of petroleum ether, naphtha and n-heptane;

the distillation range improving component comprises any one or any combination of petroleum ether, 120# solvent or 260# solvent;

among them, petroleum ether (No. 30-60, No. 60-90 in winter and autumn) is preferred.

the invention discloses a preparation method of a solubilizing stabilizer, which comprises the following steps:

s100, preparing a solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst;

s200, preparing fatty acid methyl ester;

s300, preparing a solubilizing stabilizer.

In a preferred embodiment, step S100 further includes:

s101, mixing a Ce (NO3)3 solution and a ZrO (NO3)2 solution according to the proportion that the molar ratio of each 100ml of the mixed solution is 0.5-2, then adding 45-50 g of pseudo-boehmite into the mixed solution, uniformly mixing, and then standing for 90-120 mins, wherein in the later embodiment, the mixed solution of 100ml of the Ce (NO3)3 solution and ZrO (NO3)2 solution is taken as an example for illustration, wherein the concentration of the Ce (NO3)3 solution and the ZrO (NO3)2 solution is 0.15-0.25 g/ml;

s102, drying the solution obtained in the step S101, and continuously calcining the obtained product at 600-650 ℃ for 4-6h to obtain a solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst;

s103, grinding the solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst in a ball mill pot by using zirconium balls for 3.5-4.5 hours for later use.

in a preferred embodiment, step S200 further includes:

s201, mixing refined cottonseed oil and methanol according to a molar ratio of 1: 6-8, adding a ground solid acid 2CeO2-ZrO 2/gamma-Al 2O3 catalyst, and reacting at 60-80 ℃ for 60-80 mins to obtain a mixed solution;

S202, extracting the upper yellow transparent solution of the mixed solution obtained in the step S201 to obtain biodiesel, wherein the biodiesel is a mixture of fatty acid methyl ester and methanol;

S203, distilling, washing and drying the biodiesel extracted in the step S202 to obtain yellow and transparent fatty acid methyl ester.

in a preferred embodiment, step S300 further includes:

adding the fatty acid methyl ester prepared in the step S200 into a 200# solvent, adding the fatty acid methyl ester and triethanolamine according to the weight ratio of 0.5-1 to perform hydrolysis and saponification reactions, wherein the reaction temperature is 35-40 ℃, and the reaction time is 30-35 mins; and heating and evaporating the obtained solution after the reaction is finished to obtain fatty acid amine ester, wherein the obtained fatty acid amine ester is used as the solubilizing stabilizer.

the invention also discloses a preparation method of the compound additive, which comprises the following steps:

Adding fatty acid amine ester into the isomeric alcohol, uniformly mixing, adding the corrosion inhibitor, uniformly stirring at normal temperature, and standing for 30-35mins to obtain the compound additive.

in a preferred embodiment, the volume ratio of the fatty acid amine ester to the corrosion inhibitor is 45-55%.

fig. 1 shows a flow chart of a method for preparing methanol fuel according to a preferred embodiment of the present invention, which comprises:

S100, adding the compound additive into methanol, stirring uniformly at normal temperature, and standing for 30-35mins to obtain a methanol solution;

and S200, uniformly mixing the low-temperature cold start component and the distillation range improving component, adding the mixture into the methanol solution obtained in the step S100, uniformly stirring at normal temperature, and standing for 30-35mins to obtain the transparent, colorless or light yellow methanol fuel.

In a preferred embodiment, the methanol-based fuel comprises 60-85% of methanol, 1-3% of compound additive, 10-20% of low-temperature cold start improving component and 4-20% of distillation range improving component by volume fraction.

In a preferred embodiment, the compound additive comprises a cosolvent, a corrosion inhibitor and a cosolvent stabilizer; wherein the cosolvent comprises isomeric alcohol consisting of isopropanol and tert-butanol with the volume ratio of 1: 1; the corrosion inhibitor is a mixture of benzotriazole and sodium dodecyl benzene sulfonate with the weight ratio of 1: 1; the solubilizing stabilizer is fatty acid amine ester and is obtained from a product of preparing biodiesel from cottonseed oil;

wherein the volume of the cosolvent and the corrosion inhibitor accounts for 45-55%, and the concentration of the corrosion inhibitor is 0.01-0.03 g/ml;

The low-temperature cold start improving component comprises one or more of petroleum ether, naphtha and n-heptane;

The distillation range improving component comprises one or more of petroleum ether, 120# solvent or 260# solvent;

among them, petroleum ether (No. 30-60, No. 60-90 in winter and autumn) is preferred.

the following examples are provided to specifically describe embodiments of the present invention.