Quote:
Originally Posted by kato13
I spent A LOT of time on this in the past. Still weight seemed too high by nearly an order of magnitude for the production volumes. The exception to this is when the fermentation process is ongoing due to liquid weight (I suppose the large volume could be a factor in the "weight"). Therefore I see units needing to be static for the actual production (other reasons as well such as needing fires, having to preprocess the biomass, etc). I suppose reducing still weight by 90% reflects having perfect equipment and maybe 66% to 75% reduction due to ad hoc construction would fit the game better. With these numbers I can see more stills being in the field. The biggest issue in the field would be the refining of the alcohol to 100% as simple distillation only takes you to 95%.
When looking for realism related to alcohol production in game bumps up against a lot of real world problems (like not being able to make it from wood without genetically modified yeast or bacteria we are just now refining). Agricultural waste and things like sawgrass and switchgrass have tremendous potential to be used, but they require more preprocessing which makes the industrial production easier to explain. In the field you would probably need to use something you would much rather save for eating.
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Destructive distillation is the low-tech way to go with methanol production from wood. It's not horribly efficient, but it works, it's fast, and doesn't require yeast and fermentation for a couple of weeks, which is one of the fatal flaws with ethanol production. Likely doable for a character party on the move.
Another way apparently is to heat dry wood to generate wood gas, and use a catalytic process to generate methanol from the wood gas. Not very low tech, and probably not appropriate for a character party on the run.
On a the complex industrialization side of the fence, methanol to gasoline is a thing, and as I posted before, would be easier to get up and running than converting a bunch of 1996 manufactured cars to running on ethanol or methanol. Production wouldn't be enough to get us back to an urban commuter society, but might be enough for the military to keep some aircraft up in the area, generators running for critical activities, and some vehicles running, and given a large cantonment or organized area, accumulate reserves sufficient for things like the Summer 2000 offensive, except using gas instead of alcohol.