Williams Completes Coal-Based "Green" Fuel Testing.

Flight International (3/24, Sarsfield) reported, "Williams International has completed testing of a coal-based 'hydrotreated' fuel in its FJ44-3 gas turbine engine. The engine burned 7,580 litres (2,000USgal) of the alternative fuel during 21h and 118 cycles at Williams' Walled Lake, Michigan facility." Williams says "the engine performance was identical to using Jet-A fuel and required no special engine or test cell modifications for the demonstration." The fuel, "in its final form...is a 'green' product that is free of nitrogen, aromatics and sulphur," and "because the raw feed is produced by coal liquification, it can be produced from coal in the USA."