Abstract: The invention provides a Fischer-Tropsch derived compression ignition engine, gas turbine, and fuel cell fuel which is interchangeably useable in compression ignition engines, gas turbines, and fuel cells, said fuel selected from a substantially C5 to C9 cut, a substantially C5 to C9 cut blended with a substantially C9 to C14 cut, a substantially C5 to C9 cut blended with a substantially C9 to C14 cut and a substantially C14 to C22 cut, and a substantially C5 to C9 cut blended with a substantially C14 to C22 cut. The invention extends to a process for preparing said fuel and the use of such a fuel in a CI engine, and HCCI engine, a turbine, and/or a fuel cell.

Abstract: The invention provides a Fischer-Tropsch derived compression ignition engine, gas turbine, and fuel cell fuel which is interchangeably useable in compression ignition engines, gas turbines, and fuel cells, said fuel selected from a substantially C5 to C9 cut, a substantially C5 to C9 cut blended with a substantially C9 to C14 cut, a substantially C5 to C9 cut blended with a substantially C9 to C14 cut and a substantially C14 to C22 cut, and a substantially C5 to C9 cut blended with a substantially C14 to C22 cut. The invention extends to a process for preparing said fuel and the use of such a fuel in a CI engine, and HCCI engine, a turbine, and/or a fuel cell.

Abstract: The invention provides a compression ignition engine fuel derived from a Fischer-Tropsch process, which fuel has a generally increasing iso:n paraffins ratio with increasing paraffin carbon number at least between C9 to C18, less than 0.05% m/m sulphur, and less than 10% by mass aromatics. The fuel may have on average more than 0.9 alkyl branches per paraffinic molecule as measured by H+ NMR analysis. The invention also provides a method for operating a compression ignition engine to produce low particulates emissions, which method comprises combusting the fuel with oxygen or an oxygen containing gas in the engine. Yet further the invention provides a method of improving the conversion efficiency of oxidation catalysts used in conjunction with compression ignition engines, said method including combusting the fuel in the compression ignition engine in the presence of said oxidation catalysts and in oxygen or an oxygen containing gas.