No fuel cell is needed, this is already doable, and being done(over 4 million operating hours since 1998) with the Capstone Microturbines I linked to in my post #46.
A microturbine is a compact turbine generator that delivers electricity close to the point where it is needed. Operating on a variety of gaseous and liquid fuels, this form of distributed generation technology made its commercial debut in 1998.30 or 60KW in a refrigerator sized unit, scalable to 1.2 MW. A bank of these, or more, would power most any substation, mall, or neighborhood.Microturbines can serve as primary, emergency backup, or standby power; add capacity and reduce grid consumption bottlenecks simultaneously; and deliver energy cost savings while supplying clean, reliable power with low maintenance needs.
About the size of a refrigerator, each Capstone MicroTurbine unit generates 30 to 60 kilowatts of electricity, enough to power a small business. Maximum thermal efficiencies can be achieved when the exhaust is used in a combined heat and power, or cogeneration, application. With its flexible design, generation capacity is unlimited when running in parallel to the electric grid -- up to 1.2 megawatts of electricity, coupled independent of the grid.
Like a jet engine, the Capstone MicroTurbine mixes fuel with air to create combustion. This combustion turns a magnet generator, compressor and turbine wheels on a revolutionary single shaft, air bearing design at high speed with no need for additional lubricants, oils or coolants. The result is a highly efficient, reliable, clean combustion generator with very low NOx emissions that, unlike diesel generators, can operate around the clock without restrictions. And, unlike combined cycle gas turbines, these power systems use no water.
This watershed 21st century energy management solution is at work now, in a diverse range of industrial, commercial and government applications and geographic environments.