TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Component: The fuel cell is a molten carbonate fuel cell, or a solid oxide fuel cell. It is operated at 600degreesC. The mechanism for recovering energy comprises a gas turbine, a heat exchanger, or Stirling engine.The hydrogen gas separation system or oxygen gas delivery system comprises a rotary pressure swing adsorption (PSA) module. The pump preferably comprises a vacuum pump.The PSA module can deliever a hydrogen-containing gas to the fuel cell, it preferably comprises a first adsorbent and a second material that is a second adsorbent, a steam reforming catalyst, or a water shift reaction catalyst. The first adsorbent preferentially adsorbs carbon dioxide compared to water vapor, and comprises a promoted material.The gas turbine system is preferably coupled to the gas systems. It is further coupled to a compressor, a pump, or an auxiliary device.(1) preferably comprises a first adsorption module and the first exhaust gas stream is enriched in carbon dioxideA combustor defines a first inlet for receiving the first exhaust gas stream and an outlet for discharging a combustion product gas stream.The first fluidly conduit couples the combustor outlet and a cathode inlet defined by the fuel cell. It also preferably couples to the gas turbine system. A second conduit couples a cathode outlet defined by the fuel cell and the gas turbine.Preferred System: The electrical current generator preferably comprises:(i) a fuel cell operating at 250degreesC;(ii) (1) or (2) coupled to the fuel cell, (1) can produce a first exhaust stream and (2) can produce a second exhaust gas stream; and(iii) a gas turbine system coupled to (1) or (2) which receives the first exhaust gas stream or the second exhaust gas stream.The gas turbine system is powered by energy recovered from the gas systems, or heat of the fuel cell.The system further comprises:(1) a combustor;(2) a first conduit fluidly coupler;(3) a second conduit fluidly coupler; and(4) a heat exchanger.The system more preferably comprises:(i) an inlet for receiving a fuel gas stream;(ii) an outlet for discharging a fuel cell exhaust gas stream;(iii) a fuel gas delivery system for delivering the fuel gas stream to the inlet;(iv) a gas turbine system coupled to the delivery system;(v) a first conduit fluidly communicating with the fuel cell outlet for carrying the fuel cell exhaust gas stream;(vi) a second conduit for carrying a heat recovery working fluid and fluidly coupled to the gas turbine system; and(vii) a first heat exchanger housing a first portion of the first conduit and a first portion of the second conduit.Even more preferably, the system comprises:(i) a molten carbonate fuel cell or a solid oxide fuel cell; and(ii) a PSA module coupled to the fuel cell that can produce a hydrogen-containing gas for delivery to the fuel cell.Preferred Process: The process for providing a fuel stream to a fuel cell most preferably comprises:(i) establishing a first PSA in a hydrogen-containing gas stream under conditions to separate the hydrogen-containing gas stream into a hydrogen-enriched gas stream and a carbon dioxide-depleted gas stream;(ii) introducing the hydrogen-enriched depleted gas stream into an apparatus for establishing PSA; and(iii) introducing the hydrogen-enriched gas stream into the fuel cell.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The catalyst comprises a copper (Cu)-zinc oxide (ZnO) catalyst, a transition metal carbonyl complex catalyst, or a catalyst comprising a transition group metal inserted into a zeolite cage.