Fuel cells are an electricity generation method. They oxidize fuels (methane, hydrogen) at low temperature, electrochemically, without combustion—going directly from fuel to electrons.

This would have been simply a natural gas power plant, of a different type.

I'm really wondering about the air filtering needed for this to work. Gas turbines are already quite sensitive to bigger particles in the air but for the fuel cell membranes, this could be a much harder problem.