Exxonmobil Research and Engineering Company

John Richard Bateman

Paul Joseph Berlowitz

Richard Henry Schlosberg

Robert J Wittenbrink

Jack Wayne Johnson

Daniel Francis Ryan

Lisa I-Ching Yeh

Richard C Miller

Raf F Caers

Robert Jay Wittenbrink

A blended fuel, useful as a diesel fuel, wherein the fuel blend contains an undercut conventional diesel fuel, blended with a Fischer-Tropsch derived diesel fuel, such that the blend demonstrates better than expected emissions and a reduced sulfur content. In particular, the blend is an asymmetric diesel fuel blend comprising a Fischer-Tropsch derived hydrocarbon distillate having a T95 of at least 600&deg; F., blended with a petroleum derived hydrocarbon distillate having an initial boiling point and a T95 no greater than 640&deg; F.

Low sulfur, low emission blends of fischer-tropsch and conventional diesel fuels

This invention relates to an ultra-low sulphur fuel composition comprising (A) a major amount of a base fuel having (a) no more than 50 ppm by weight of sulphur, (b) no more than 10% by weight of olefins and (c) no more than 10% by weight of an ester and (B) at least 1% by weight based on the total fuel composition of an oxygenate selected from its group consisting of a saturated, aliphatic monohydric alcohol having 4 to 20 carbon atoms, ketone having on an average 5 to 25 carbons and mixtures of the alcohol(s) and ketone(s) and having no other oxygen atom in its structure. These specific oxygenates further reduce particulate emissions from the exhausts of engines powered by ultra-low sulphur diesel fuels which fuels are already known to generate low particulate emissions. These oxygenates are capable of an impressive performance with respect to particulate emissions over a broad range of vehicles and driving cycles when compared with the performance of oxygenates used hitherto.

Diesel fuel composition

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Berkshire, United Kingdom

John Richard Bateman