The hottest methanol fuel needs to be actively pil

2022-08-13
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Methanol fuel also needs to be actively piloted and demonstrated

at the 2015 China alcohol ether fuel and alcohol ether automobile industry development conference recently held in Ordos, industry experts combed the development of methanol fuel: at present, China has mastered the technologies and methods to solve key common problems, and accumulated some achievements and experience of industrialized operation. Hu Qianlin, chairman of the alcohol ether fuel and alcohol ether clean vehicle Professional Committee of the China Federation of petroleum and chemical industries, said that the practicality and reliability of the Shanghai University Suixi technology transfer strategic cooperation agreement signed between methanol fuel technology and Shanghai University still need to be proved by practice, and the pilot demonstration of alcohol ether fuel and methanol vehicles should be actively carried out in the future

among a variety of alternative energy sources for vehicle oil, methanol is economically feasible and environmentally friendly. Although methanol and gasoline have many similar physical, chemical and combustion characteristics, there are still some differences between them. When this difference is reflected in the fuel system, there will be corresponding technical problems, which are the key points that the methanol fuel industry has been trying to overcome. He Guangyuan, honorary chairman of the alcohol ether fuel and alcohol ether clean vehicle special committee of the petrochemical Federation and former Minister of the Ministry of machinery industry, said that compared with gasoline, the key points of methanol technology mainly lie in stratification, cold start, metal corrosion and non-metallic swelling

two methods to make methanol fuel not stratified

He Guangyuan said that methanol fuel stratification is mainly caused by water in the system or low mitigation temperature, which often leads to low thermal efficiency of fuel, unstable combustion, and even damage to the engine. At present, there are two main methods to solve the problem of methanol fuel stratification. One is to ensure the tightness of storage, transportation and filling in the whole process, so as to avoid moisture entering the system; Second, add a small amount of cosolvent in the oil, such as alcohols and ethers

there are three ways of cold start at low temperature

the latent heat of methanol evaporation is more than three times higher than that of gasoline, and the theoretical air-fuel ratio of methanol combustion is lower than that of gasoline. During methanol combustion, a wave absorbing combustion mixture will be formed, which will lead to the difficulty of cold start at low temperature of the engine, but this problem does not exist in low proportion methanol gasoline. According to the technical personnel of Guizhou Hengli new energy company, at present, several methods are generally used to solve the problem of low-temperature cold start: first, the method of double fuel tanks is used to start with gasoline, and the engine automatically switches to methanol fuel mode after the internal temperature reaches 60 ℃. This method has been applied by Geely Automobile in the development of methanol passenger vehicles; The second is to add volatile low boiling point components with a volume ratio of 10% - 30% into methanol fuel to improve the volatility of oil products in winter. This method has been verified by practice in the United States in the last century and proved to be feasible. Third, explore adding auxiliary heating devices at the engine oil inlet to provide instantaneous gasification heat for the oil. Among them, the first two methods are the most effective and reliable in solving cold start, and have been widely used

inhibitors solve the problem of metal corrosion

the acidic substances produced by methanol in the process of use will cause corrosion to the metal parts of the engine. Generally, whether the electromechanical coil of methanol gasoline is burned out and whether the contact of the reversing switch is good can be solved by using corrosion inhibitors, while the high proportion of methanol fuel is mainly achieved by using alcohol resistant metal materials in cars. At present, corrosion inhibitors developed by domestic academy of Sciences, Nanjing Chemical Industry Company, Shanxi Huadun Industrial Co., Ltd. and other units have effectively solved this problem. The metal corrosion inhibitor developed by Shanxi Huadun company has been industrialized and demonstrated. After tracking and testing the vehicles with 362000 kilometers of M15 methanol gasoline and engine disassembly, Shanxi Provincial Bureau of quality and technical supervision has found no abnormalities in the metal and non-metal parts of the vehicles

alcohol resistant materials prevent non-metallic swelling

automotive components such as rubber and plastic will stab the other end of the test piece into the movable collet in methanol and then clamp, causing swelling, hardening, embrittlement or softening, which may lead to dangerous accidents such as oil leakage. Yaochunde, a professor at the State Key Laboratory of internal combustion engine of Tianjin University, pointed out that after scientific verification, the swelling degree of low proportion methanol gasoline on non-metal is basically similar to that of national standard gasoline. At the same time, methanol gasoline is added with swelling inhibitors, so it can be used directly without changing the rubber parts of the original vehicle in general. With the enhancement of alcohol resistance adaptability of vehicle materials in recent years, there is basically no swelling problem in the application process of methanol gasoline. The high proportion of methanol gasoline can solve the problem of non-metallic swelling by using alcohol resistant vehicle materials. At present, all alcohol related components of methanol vehicles use alcohol resistant structures and materials

add anti-wear agent to improve lubrication performance

Liu Shengquan, a professor at the school of automotive engineering, Chang'an University, said that the lubricity of methanol gasoline is very poor, which is a difficult point in technology. Only by improving the lubricity of methanol fuel can we effectively protect methanol automotive parts and improve the deep processing rate of materials and the conversion rate of integrated devices. By adding anti-wear agents, the lubricity and stability of methanol gasoline can be greatly improved, and the physical and chemical properties of anti-wear agents should be as close to gasoline as possible, be miscible with methanol and gasoline, and have better combustion performance and volatility. During the research, it was found that the viscosity of methanol could not improve its lubricity, but only affected its pumping capacity and the design of equipment in storage, transportation and deployment

Zhao Qinglin, chairman of Gansu Sangtian clean energy development Co., Ltd., said that practice is the only standard to test the truth. Since we all recognize the clean and environmental protection characteristics of methanol fuel now and believe that methanol gasoline is the best choice to solve the emission of vehicle exhaust pollutants, we should boldly carry out practice. Only the government and enterprises have the courage to practice, can we fundamentally solve the problems encountered in the promotion and application of methanol fuel. This initiative was highly recognized by the participating experts

he also suggested that at present, the promotion and application of low proportion methanol gasoline is easier to be accepted by the majority of consumers. Low proportion methanol gasoline has better versatility, does not need to change cars or add any equipment, and is suitable for all internal combustion engine vehicles. In addition, low proportion methanol gasoline does not need to build a separate station, and can be sold by making full use of existing channel gas stations

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