A combined generation system according to one embodiment of the present invention comprises: a natural gas synthesizing apparatus for receiving coal and oxygen, generating synthetic gas by a gasifier, and permitting the synthetic gas to pass through a meth...

A fuel processing system 10 is disclosed which supplies a hydrogen-rich gas to a fuel cell main unit 20. When supply of raw fuel is stopped, the fuel processing system 10 executes a purge treatment to cause steam to flow as a purge gas in a forward directi...