Why not go for the higher concentrations now? Why not target agricultural ethanol plants now? I grant that long term they are limited, but why not use them now?
Higher CO2 concentration seems like it ought to make your initial testing easier.
Likewise, if you are really more cost effective than distillation all the existing ethanol plants would love to replace their boilers with your system. It seems like a simple way to get a small cash infusion selling to them. They can convert their ethanol to gasoline as well, and have infrastructure in place.
What I'm saying is don't bite off more than you can chew. If any piece works now push it while getting the others working.
Higher CO2 concentration seems like it ought to make your initial testing easier.
Likewise, if you are really more cost effective than distillation all the existing ethanol plants would love to replace their boilers with your system. It seems like a simple way to get a small cash infusion selling to them. They can convert their ethanol to gasoline as well, and have infrastructure in place.
What I'm saying is don't bite off more than you can chew. If any piece works now push it while getting the others working.