Vehicle fuel for replacing gasoline and production process of vehicle fuel

Abstract

The invention provides a vehicle fuel for replacing gasoline, and relates to the field of vehicle fuels. The vehicle fuel is composed of the following raw materials by mass or volume: 30% of alkyl and isooctane, 30% of methanol, 20% of C5, C6, C8 and naphtha, 30% of n-heptane and ethylene oxide, and 5% of an additive. The invention provides vehicle fuel for replacing gasoline, and provides a method for producing a fuel suitable for vehicles by blending methanol and various additives according to a certain proportion and process without changing the vehicles. According to the invention, the technical problems that in the prior art, oil and alcohol are difficult to dissolve mutually, fuel flash point is low, layering is prone to occurring, stability is poor, metal rubber and plastic are corroded and swelled, heat value power is low, low-temperature cold start is achieved, high-temperature air resistance is achieved, an oil way system is prone to being blocked, and matching universality is poor are solved.

Description

technical field [0001] The invention relates to the field of vehicle fuel, in particular to a vehicle fuel replacing gasoline and a production process thereof. Background technique [0002] At present, the alcohol-based fuel technology at home and abroad is immature, and university research institutes have invested a lot of manpower and material resources in research and development, but so far have not made breakthrough progress. The reason is that there are too many technical bottlenecks and it is difficult to extract flashes and dissolve them. Specifically include the following defects: [0003] 1. Difficult miscibility of oleyl alcohol: Alcohols and long carbon chain substances gasoline / diesel are difficult to miscible due to the large difference in carbon chain number (1:8-22). Methanol contains hydroxyl, which is a polar substance, while gasoline / diesel is non-polar , the mutual solubility of solutions always follows the principle of "like miscibility of mixed soluti...

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Problems solved by technology

[0003] 1. Difficult miscibility of oleyl alcohol: Alcohols and long carbon chain substances gasoline / diesel are difficult to miscible due to the large difference in carbon chain number (1:8-22). Methanol contains hydroxyl, which is a polar substance, while gasoline / diesel is non-polar , the mutual solubility of solutions always follows the principle of "like miscibility of mixed solutions", which leads to the solution of the mutual solubility of methanol and gasoline / diesel, which is a recognized bottleneck problem; whether it is relying on pressure mixing or adding a certain amount of co-solvent, it cannot Ensure the homogeneous mixing of alcohols and gasoline / diesel, which is more serious at low temperatures

[0004] 2. Low flash point of fuel: the flash point of alcohol is only 11-12°C, while the closed flash point of fuel oil is required to be ≥38°C. Therefore, its flash point cannot be improved all the time. Because of this, the technology of improving the flash point of alcohol-based fuels has become a worldwide problem and bottleneck. It is understood that there is no major breakthrough in this problem at home and abroad.

[0005] 3. Easy to stratify and poor stability: Methanol fuel will automatically stratify after a long time of storage, and precipitation will occur, especially at low temperature and when it encounters water; it is easy to change color when exposed to light

[0007] 5. Low calorific value and power: the biggest problem restricting methanol gasoline is the low calorific value of methanol, which affects the power of automobile engines, which limits the high proportion of methanol mixed

[0008] 6. Low temperature cold start, high temperature air resistance: it is difficult to start the engine at a low temperature of -20°C to -30°C

[0009] 7. The oil circuit system is easy to block: Alcohols are easy to precipitate colloids in gasoline / diesel, resulting in alcohol-based fuel deposits on oil pumps, fuel injectors, intake valves and combustion chambers being 12.9% higher than those of fossil fuels %~18.9%, this is because methanol gasoline is a hydrocarbon oxygen-containing compound, which can accelerate the oxidation and condensation reaction of unstable components in oil products at high temperature parts such as engine intake valves, making it easier to produce deposits and carbon deposits

[0010] 8. Poor versatility of intermixing: Due to the lack of good substitution, low temperature resistance and acid-base balance, additives cannot be mixed with commercial gasoline / diesel in any proportion

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