Abstract: A method of operating a molten carbonate fuel cell having an anode and a cathode and in between a matrix comprising molten carbonate. Carbon dioxide is introduced into the matrix at a distance from the cathode. This greatly reduces the cathode's deterioration and in the system design increases the control potential of the fuel cell. A fuel cell or a fuel cell stack using said method. Method of generating electricity in a fuel cell, wherein water and carbonaceous material are heated at high temperature, yielding hydrogenous gas for the anode. The hydrogenous depleted gas from the anode is supplied with oxygenous gas and at least partially oxidized, producing heat for heat exchange with the water and carbonaceous material. Installation comprising a reform unit and a fuel cell using said method.