Engine operated by a non-polluting recyclable fuel

A system of operating an external combustion engine which is operated by a heated working fluid of the engine, comprising providing a magnesium-aluminum fuel, providing a combustion chamber in association with the engine, burning said fuel in said combustion chamber, and subjecting the working fluid of the engine to the heat generated by the burning uel in said combustion chamber.

A system of operating an external combustion engine which is operated by a heated working fluid of the engine, comprising providing a fuel selected from the group consisting of magnesium, aluminum, magnesium plus aluminum and a magnesium-aluminum alloy, providing an energy conversion device, feeding the fuel and air into said energy conversion device and burning the fuel therein, passing the working fluid of the engine in heat transfer relation to said energy conversion device to heat the working fluid by the fuel therein, separating the solid oxides resulting from the burning of the fuel while in said energy conversion device and collecting the same.

A system of operating an external combustion engine which is operated by a heated working fluid of the engine, comprising providing a magnesium-aluminum fuel, providing an energy conversion device, feeding the fuel and air into said device and burning the fuel therein, providing a heat transfer means in heat transfer relation to said device, passing the working fluid of the engine in heat transfer relation to said heat transfer means so as to heat the working fluid by the burning fuel indirectly through said heat transfer means, separating the solid oxides resulting from the burning of the fuel while in said energy conversion device and collecting the same.