The problem is that your proposal is not tapping into an unused source of power. In any case other than that, you end up putting more power into producing the solution than what comes out. For example, one guy proposed creating small cyclones and spinning the dissolved minerals out of sea water. One of the things spun out of the water was gold. So his (not practical) proposal was tapping into an unused source of value.
Your plasma gasses, if they could be stored in some way, will require more energy in, than out.
One practical proposal is to outfit the Sahara Desert with electrical solar panels and power the continent. As a side effect this might increase the updrafts and cause more rain in the desert and make it more habitable as well.
Morocco turns the Sahara desert into a solar energy oasis
Again, the advantage is tapping into unused energy that currently is wasted.