TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Process: In operating a molten carbonate fuel cell, the hydrogen-containing stream comprises 0.6 or at least 0.95 mole fraction molecular hydrogen. At least some of the hydrocarbons of the hydrocarbon stream comprise one or more vaporizable hydrocarbons having a carbon number of at least 4. The process further comprises feeding carbon dioxide to a cathode portion of the molten carbonate fuel cell in an amount so that partial pressure of carbon dioxide in a majority of the cathode portion of the molten carbonate fuel cell is higher than a partial pressure of carbon dioxide in a majority of an anode portion of the molten carbonate fuel cell. A difference between the partial pressure of carbon dioxide at the inlet or exhaust outlet of the cathode portion of the molten carbonate fuel cell and a partial pressure of carbon dioxide at the exhaust outlet of the anode portion of the molten carbonate fuel cell is 0.05-0.15 bara. A portion of the carbon dioxide provided to the cathode portion of the molten carbonate fuel cell is provided by the high temperature hydrogen-separation device. The process further comprises separating a portion of a hydrogen-depleted gas stream comprising at least one of the carbon oxides and at least one of the gaseous hydrocarbons from the steam reforming feed, contacting a portion of the separated hydrogen-depleted stream with an oxidant to produce a heated stream, and providing a portion of the heat from the heated stream to the anode exhaust and/or to the hydrocarbon stream comprising hydrocarbons. It further comprises providing air and carbon dioxide to a cathode of the molten carbonate fuel cell, where the air comprises molecular oxygen, and controlling a flow rate of the air and/or carbon dioxide so that a molar ratio of carbon dioxide to molecular oxygen is at least 2. The process further comprises mixing a portion of the molecular hydrogen provided to the molten carbonate anode with an oxidant at one or more anode electrodes in an anode of the molten carbonate fuel cell, and generating electricity from the molten carbonate fuel cell at an electrical power density of 0.1 W/cm2.