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A dual stack fuel cell system comprising a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side, a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from the

A dual stack fuel cell system comprising a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side, a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from the first anode exhaust and to output a second anode exhaust, and a second cathode side, adapted to receive oxidant gas and to output a first cathode exhaust, wherein the first cathode side receives at least the first cathode exhaust outputted from the second cathode side; and wherein the first fuel cell stack includes indirect internal reforming and the second fuel cell stack may not include any indirect internal reforming.

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What is claimed is: 1. A dual stack fuel cell system comprising:a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side;a second fuel cell stack comprising a second anode side, adapted to receive processed anode exh

What is claimed is: 1. A dual stack fuel cell system comprising:a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side;a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from said first anode exhaust and to output a second anode exhaust, and a second cathode side, adapted to receive oxidant gas and to output a first cathode exhaust;wherein said first cathode side receives at least said cathode exhaust outputted from said second cathode side; andwherein said first fuel cell stack includes a first indirect internal reformer and said second fuel cell stack includes a second indirect internal reformer, said fuel cell system further comprising a reformer bypass line for bypassing a portion or all of said processed anode exhaust around said second indirect internal reformer to an anode compartment of said second anode side.