Читать книгу Encyclopedia of Renewable Energy - James Speight G., James G. Speight - Страница 169

Ethers are a class of carbon compounds that contain an ether group (C-O-C) in which either carbon may be attached to other carbon atoms as well (such as the commonly-used diethyl ether, CH₃CH₂OCH₂CH₃). The most commonly used fuel additive ethers are methyl-tertiary-butyl-ether (MTBE) and ethyl-tertiary-butyl-ether (ETBE).

Bioethers (Table B-8) are produced by the reaction of reactive iso-olefin derivatives, such as iso-butylene, with bioethanol, which is ethanol produced from bio-sources.

Table B-8 Examples of bioether derivatives used in fuels.

Ether	Use in fuels
Dimethyl ether (DME)	Alternative fuel for gasoline engines
Diethyl ether (DEE):	Used as an ignition improver for gasoline
	Possible alternative fuel for gasoline engines
Methyl tertiary-butyl ether (MTBE):	Additive for gasoline
Ethyl tert-butyl ether (ETBE):	Additive for gasoline
Tert-amyl methyl ether (TAME):	Additive for gasoline
Tert-amyl ethyl ether (TAEE):	Additive for gasoline
	Increases the solubility of ethanol in diesel

When added to gasoline, a bioether can make the gasoline burn cleanly and completely and enhance engine performance, while reducing engine wear and toxic exhaust emissions, as well as the amount of ground-level ozone.