COMBUSTOR AND FUEL CELL SYSTEM

摘要

A combustor for a fuel cell provided herein is capable of effectively avoiding combustion instability and misfire due to the combustion instability while having a simple structure and capable of being reduced in size easily. To achieve such a combustor, a partially shielding member 22 is disposed in a gas channel 21 a for oxygen-containing gas passing. The partially shielding member 22 partially shields the gas channel 21 a, thereby introducing part of the oxygen-containing gas passing the gas channel 21a into a primary combustion zone 28 formed in the inside area of the partially shielding member 22 while allowing passing of residue of the oxygen-containing gas toward a combustion zone 29 on a downstream side of a gas passing direction relative to the primary combustion zone 28. A porous ceramic body 24 is held in the secondary combustion zone 29. The porous ceramic body 24 is a ceramic foam having excellent heat resistance and excellent gas permeability. The porous ceramic body 24 has an internal channel 24a formed in a central portion thereof and an external channel 24b formed on an outer peripheral side thereof.