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Investigation on a Novel Mixed Dialkyl Oxalate System as an Oxygenated Fuel Additive
journal contribution
posted on 2020-03-26, 11:34 authored by Wei Guo, Yingwu Yin, Na Pi, Feng Liu, Song Tu, Liyi YeThe mixed dialkyl
oxalate (mDAO) system
can be industrially synthesized inexpensively from CO with methanol,
ethanol, and mixed alcohols, which are widely available from CO-rich
industrial waste gases and syngas. In this work, a series of mDAOs
were synthesized through solvent-free partial transesterification
of dimethyl oxalate (DMO) or diethyl oxalate (DEO) with higher alcohols.
The physical and chemical properties of various mDAOs and different
oxygenated fuels were compared, and the viability of the mDAO as an
oxygenated fuel additive was tested. The experimental data indicated
that the mixed methyl ethyl oxalate (mMEO) is miscible with gasoline
in any proportion at a temperature above 263 K. The mixed methyl butyl
oxalate (mMBO) and mixed ethyl butyl oxalates (mEBO) show better solubility
in diesel than mMEO. The research octane number (RON) of the mMEO/gasoline
composite fuel increased with the increase of the mMEO concentration.
The flash point, kinematic viscosity, and cetane number of the diesel
mixed with a content of 10–20% mMBO meet the requirements of
the China national standard. Our results indicate that mDAO can be
used as a promising oxygenated fuel additive for gasoline and diesel
fuels.
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chemical propertiesdialkyl oxalatemDAOresearch octane numberdimethyl oxalatewaste gasesmethyl butyl oxalateNovel Mixed Dialkyl Oxalate SystemDMODEORONmMEO concentrationdiethyl oxalateoxygenated fuel additiveflash pointCO263 Kmethyl ethyl oxalatekinematic viscositycetane numberoxygenated fuelsOxygenated Fuel Additivediesel fuelsethyl butyl oxalates
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