Sasol Technology (Pty) Limited

Carl Louis Viljoen

Vivien Louise Van Zyl

Miriam Ajam

Ernst Hendrik Van Tonder

The invention provides a fully synthetic aviation fuel or aviation fuel component having: a total naphthenic content of more than 30 mass %, a mass ratio of naphthenic to iso-paraffinic hydrocarbon species of more than 1 and less than 15, a density (at 15&#xb0; C.) of greater than 0.775 g&#xb7;cm-3, but less than 0.850 g&#xb7;cm-3, an aromatic hydrocarbon content of greater than 8 mass %, but less than 20 mass %, a freezing point of less than &#x2212;47&#xb0; C., a lubricity BOCLE WSD value of less than 0.85 mm. The invention further provides for the preparation of a fully synthetic coal-derived aviation fuel or aviation fuel component by blending a LFTF and a tar derived blend component. The invention extends to a method of producing a coal-derived, fully synthetic aviation fuel or aviation fuel component from coal gasifier tar and an LTLF derived fraction.

Fully synthetic jet fuel

The invention relates to a Fischer-Tropsch derived aviation fuel, which fuel is used either as a fuel on its own or as a component in an aviation fuel blend, said fuel having an iso:n paraffins mass ratio above 3, at least 0.1 mass % naphthenes, &#x3c;0.01 mass % polyaromatics, and &#x3c;0.5 mass % aromatics.

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Vanderbijlpark, South Africa

Carl Louis Viljoen