Authors: A.M. Miroshnikov, D.V. Tsygankov, A.V. Polozova

Title of the article: Increasing the prospects of alcohol fuels due to the use of propylene oxide in their composition

Year: 2021, Issue: 5, Pages: 45-56

Branch of knowledge: 05.17.07 Chemical technology of fuel and high-energy substances

Index UDK: 656.13.065.3

DOI: 10.26730/1999-4125-2021-5-45-56

Abstract: The advantages and problems of using bioethanol fuels are considered, including standard gasoline containing up to 5-15% alcohol (E5-E15), medium ethanol fuels - from 20 to 40% alcohol (E20, E30, E40) and high ethanol fuels for special vehicles - from 50 to 100% alcohol (E85, E100, ED95). It has been substantiated that the maximum effect from the point of view of realizing the potential capabilities of alcohol can be provided only by high-ethanol fuel of the E85 type. Such fuel requires the use of special vehicle designs, which are called FFV (flexible fuel vehicle). The design features of such cars, as well as their cost, are considered. The main disadvantage of E85 fuel is the use of hydrocarbons in its composition as a "starting fraction", which, at low temperatures and insufficient ethanol strength, leads to delamination of the composition. To avoid this, use ethyl alcohol with a strength of 98% vol. and higher, which leads to an increase in the cost of alcohol. The article proposes to use a simple cyclic ether - propylene oxide as a "starting fraction" instead of hydrocarbons. It not only provides excellent starting properties of bioethanol fuel, but also allows the use of watered alcohol in the composition of the composition without delamination even to extremely low temperatures. Tests have shown that in the presence of propylene oxide, an alcohol with a water content of up to 20% by volume can be used. which, on the one hand, reduces the requirements for moisture content in ethyl alcohol and makes it cheaper, and on the other hand, acts as an analogue of water-fuel emulsions.

Key words: oxygenates bioethanol propylene oxide phase stability octane numbers evaporation

Receiving date: 02.08.2021

Approval date: 25.10.2021

Publication date: 24.12.2021

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