Liquid fuel for internal combustion engine

Abstract

A liquid fuel for internal combustion engine, comprising 2 to 85 wt % of an alcohol component of aliphatic monohydric alcohol having 2 to 6 carbon atoms per molecule per se or a mixture thereof and 15 to 98 wt. % of a hydrocarbon component. The liquid fuel for internal combustion engine contains an aluminum corrosion inhibitor in an amount capable of inhibiting the aluminum corrosion at predetermined given temperature. The aluminum corrosion inhibitor comprises at least one member selected from among methanol, glycol hydrocarbons, ketone hydrocarbons, ester hydrocarbons and aldehyde hydrocarbons.

Description

TECHNICAL FIELD [0001] The present invention relates to improvements in liquid fuels for enabling an efficiency and output substantially equal to or higher than in conventional gasoline without requiring any change in the structure or material of an existing internal combustion engine for gasoline. BACKGROUND ART [0002] As a part of efforts against recent environmental problems, the problem of air pollution by automobile exhaust gas has been taken more seriously. Therefore, an alcohol-based fuel including alcohols added to light naphtha is drawing attention as a fuel for internal combustion engine usable as a substitute for the conventional gasoline, which can remarkably reduce the concentrations of carbon monoxide (CO) and hydrocarbon (HC) in the automobile exhaust gas, and its practical application has been examined. [0003] Such a synthetic liquid fuel comprising light naphtha and alcohols can preferably reduce SOx and the like also in addition to the carbon monoxide (CO) and hydr...

AI Technical Summary

Benefits of technology

[0006] According to this characteristic, when the alcohol component in the resulting liquid fuel for internal combustion engine is N wt. %, water is added thereto in an amount corresponding to the larger of 0.002×N wt. % or more and 0.1 wt. % of the resulting liquid fuel for internal combustion engine, whereby a liquid fuel for internal combustion engine extremely excellent in practicability, or free from the corrosion (elution) of metal, particularly, aluminum, aluminum alloy or the like, can be obtained.

[0008] According to this characteristic, at least one member selected from among methanol, glycol hydrocarbons, ketone hydrocarbons, ester hydrocarbons, and aldehyde hydrocarbons is used as the aluminum corrosion inhibitor, whereby not only a liquid fuel for internal combustion engine extremely excellent in practicability, or free from corrosion (elution) of metal, particularly, aluminum, aluminum alloy or the like can be obtained, but also a liquid fuel for internal combustion engine excellent in low-temperature stability, or capable of avoiding the separation between alcohol and hydrocarbon at low temperature can be obtained.

[0010] According to this, inexpensive water is used as part of the aluminum corrosion inhibitor, whereby the amount of the relatively expensive aluminum corrosion inhibitor other than water can be minimized to prevent an increase in cost of the resulting liquid fuel for internal combustion engine.

[0012] According to this, the inclusion of the ether component can prevent the separation between the alcohol component and the hydrocarbon component in the resulting liquid fuel during long-term storage or the like.

Problems solved by technology

However, the inclusion of the alcohols leads to a problem that contact of a synthetic liquid fuel with metal, particularly, aluminum, aluminum alloy, or the like at high temperature and high pressure in a fuel injection device or the like causes corrosion (elution) of the aluminum, aluminum alloy or the like during long-term use, which may cause a failure.

Images