Catalytic fuel tank inerting systems

A fuel tank inerting system, the system comprising:

• a fuel tank;
• an inerting system flow path connected to the fuel tank;
• a first reactant source configured to supply a first reactant into the inerting system flow path;
• a second reactant source configured to supply a second reactant into the inerting system flow path;
• a catalytic reactor arranged along the inerting system flow path configured to receive a reactant mixture comprising a mixture of the first reactant and the second reactant to generate an inert gas to be supplied to the fuel tank through the inerting system flow path to fill an ullage space of the fuel tank;
• a condenser heat exchanger arranged along the inerting system flow path between the catalytic reactor and the fuel tank and configured to cool an output from the catalytic reactor;
• a first ejector arranged along the inerting system flow path and configured to receive the first reactant at a first ejector first inlet, the second reactant at a first ejector second inlet, and output the reactant mixture through a first ejector outlet;
• a second ejector arranged along the inerting system flow path and configured to receive an inert gas at a second ejector first inlet, the second reactant at a second ejector second inlet, and output a mixture of the second reactant and inert gas through a second ejector outlet;
• and
• a heating coil wrapped around the catalytic reactor, the heating coil configured to heat the first reactant upstream of the first ejector.

A fuel tank inerting system, the system comprising:

• a fuel tank;
• an inerting system flow path connected to the fuel tank;
• a first reactant source configured to supply a first reactant into the inerting system flow path;
• a second reactant source configured to supply a second reactant into the inerting system flow path;
• a catalytic reactor arranged along the inerting system flow path configured to receive a reactant mixture comprising a mixture of the first reactant and the second reactant to generate an inert gas to be supplied to the fuel tank through the inerting system flow path to fill an ullage space of the fuel tank;
• a condenser heat exchanger arranged along the inerting system flow path between the catalytic reactor and the fuel tank and configured to cool an output from the catalytic reactor;
• a first ejector arranged along the inerting system flow path and configured to receive the first reactant at a first ejector first inlet, the second reactant at a first ejector second inlet, and output the reactant mixture through a first ejector outlet;
• a second ejector arranged along the inerting system flow path and configured to receive an inert gas at a second ejector first inlet, the second reactant at a second ejector second inlet, and output a mixture of the second reactant and inert gas through a second ejector outlet;
• and
• a water collector arranged downstream from the condenser heat exchanger along the inerting system flow path.