A system for converting liquid fuel into gaseous fuel is provided. The system may have a supply of liquid fuel. The system may also have a combustor, and one or more pumps in fluid communication with the supply. The one or more pumps may be configured to pump liquid fuel from the supply into the combustor. The system may also have a compressor in fluid communication with an inlet of the combustor, and a turbine in fluid communication with an outlet of the combustor. The turbine may be connected to drive the compressor and the one or more pumps. The system may also have a heat exchanger in fluid communication with an outlet of the turbine and an outlet of the one or more pumps.