Patent ID: 7754161

Claim:
A reactor, comprising: a low temperature reaction unit which causes a reaction at a predetermined temperature, the low temperature reaction unit including a CO remover; a high temperature reaction unit which causes a reaction of a fuel at a higher temperature than the low temperature reaction unit, the high temperature reaction unit being provided separately from the low temperature reaction unit with a space therebetween, and the high temperature reaction unit including a reformer to reform the fuel into hydrogen; and a communicating tube via which the low temperature reaction i 0 unit and the high temperature reaction unit communicate with each other; wherein at least one of the low temperature reaction unit and the high temperature reaction unit has a first surface, and the other of the low temperature reaction unit and the high temperature reaction unit has a second surface which is opposed to the first surface with the space therebetween; wherein the first surface comprises a concave surface and a projecting surface which projects towards the second surface, and a length between the concave surface and the second surface is longer than a length between the projecting surface and the second surface; and wherein the communicating tube is provided between the concave surface and the second surface.