(JP4500948-W)      Natural gas feed stock, fuel plus air is conventionally processed at the front end by reforming, CO shift, CO2 removal, methanation, etc. to obtain feed for the NH3 synthesis loop for NH3 prod. formation. A purge is fed to the anode as fuel for a cell. Anode exhaust is mixed with fuel for supply to the process front end. The stream from the front end CO2 removal unit is mixed with air and passed to cathode gas recycle loop as oxidant, cathode, exhaust gas is partially recycled and the rest vented. Heat generated in the cell is esp. utilised in a waste heat boiler for steam prodn. for compressors, etc. Cells are in stack form.    USE/ADVANTAGE -   Purge gas H2 and CO2 off gases are efficiently utilised leading to a better overall energy balance. Since CO2 waste is now utilised, greenhouse effect in atmos. is alleviated. Capital costs are reduced. Heat produced in cell is used in NH3 prodn.    (US5169717-A)      Ammonia is made in plant having a synthesis gas prepn. section and an ammonia synthesis loop (25) with an integrated molten carbonate fuel cell (29). A purge gas stream (28) is passed from the loop contg. components and is usable as fuel in the cell to the cell anode chamber (29A) and an exhaust gas is passed, which is usable as fuel in the prepn. section, from the anode chamber to the section.    A CO2-contg. stream (35) from the prepn. section is passed to a cathode gas loop (31-33) of the cell with this stream pref. obtd. as an off-gas stream from a CO2 removal unit in the prepn. section. The cell is pref. an internal reforming cell and part of the energy obtd. in it is as surplus heat which is used to generate high-pressure steam for use in the ammonia plant.    ADVANTAGE -   Improves the overall energy balance.    (JP2674850-B2)      Apparatus to produce ammonia includes a synthetic gas making part and an ammonia synthesis loop. Purge gas from an ammonia plant containing fuel components from a fuel cell is used. Waste gas is used from a gas making part, transferred from the anodised chamber of a fuel cell to the gas making part of an ammonia plant. The flow containing carbon dioxide obtained in the ammonia production is sent to the cathode gas loop of a fuel cell.    ADVANTAGE -   Balance of total energy is improved.