Methanol fuel modifier and high-proportion methanol fuel for gasoline engine

Abstract

The invention discloses a methanol fuel modifier and a high-proportion methanol fuel for a gasoline engine. The methanol fuel modifier comprises the following components by volume: 30-65 parts of cyclic ether, 10-20 parts of ketone, 5-20 parts of amide and 20-45 parts of alcohol acid. The number of carbon atoms in the cyclic ether, the ketone, the amide and the alcohol acid is less than or equal to 6, and the cyclic ether, the ketone, the amide and the alcohol acid are all liquid at the temperature of 20 DEG C. The high-proportion methanol fuel for the gasoline engine comprises methanol, hydrocarbon or hydrocarbon mixture and methanol fuel modifier, wherein the number of carbon atoms in the hydrocarbon or hydrocarbon mixture is less than or equal to 15. The methanol fuel modifier can be used for changing the performance of the methanol gasoline. The high-proportion methanol fuel with the methanol fuel modifier can be used at low temperature, can be stored in the humid environment for a long time without phase separation, is low in addition amount, and can be popularized and applied on a large scale throughout the country.

Description

technical field [0001] The invention relates to methanol fuel and its modifying agent, in particular to a methanol fuel modifying agent and high-proportion methanol fuel for gasoline engines. Background technique [0002] Crude oil is the most important primary energy in the world, and the essence of the current energy shortage is the shortage of crude oil. Vehicle fuel is the main application field of crude oil, accounting for more than 70% of the total global crude oil consumption. So far, my country's dependence on foreign oil has exceeded 50%. However, my country's coal reserves rank among the top in the world, and replacing oil with coal is an ideal way to reduce my country's dependence on foreign oil. [0003] A mixture of methanol and gasoline - methanol gasoline is a "substituting coal for oil" route. Methanol gasoline is a new type of clean fuel prepared by using industrial methanol or fuel methanol, and the existing national standard gasoline according to a cert...

AI Technical Summary

Problems solved by technology

High-proportion methanol gasoline has technical defects such as the need to modify the engine, difficulty in cold start in winter, easy phase separation in wet weather, and corrosion of the engine and fuel delivery system during long-term use. In order to solve the above-mentioned defects in the practical application of high-proportion methanol gasoline, people Add additives to methanol gasoline to improve its performance, such as the direct vehicle high-proportion methanol gasoline disclosed in Chinese patent document CN101768477A

However, in the prior art, a large amount of additives is added to methanol gasoline. On the one hand, the cost of methanol gasoline will increase, and on the other hand, adding too many additives will make the final methanol gasoline not comply with the regulations of GB / T23799-2009 , which is not conducive to the large-scale promotion and use of

In addition, the additives in the prior art do not well solve the phase separation problem of methanol gasoline in a humid environment or when stored for a long time