
US corn-based ethanol receives a government subsidy of $.50 p/gallon, and is also protected by a $.50 p/gallon (anti-dumping) tariff against less expensive Brazilian sugar cane-based ethanol. Other problems with corn-based ethanol is a poor rate or return in terms of energy invested compared to energy produced. Another serious problems: cb ethanol corrodes pipelines (alcohol attacks water) and is usually shipped via land transport, trucks, trains, adding expense and restricting use to local and regional destinations. Finally, mass conversion of cropland to cb ethanol has proven to have major impact on global food prices.
Brazil is doing great things with sugar-based ethanol. The rule of thumb for synthetic fuels is that the natural resource from which it is derived accounts for most (up to 90%) of the cost of production. Sugar cane ethanol is much cheaper to produce because it is the sugar that is fermented to make alcohol, and obviously sugar cane has a higher sugar content than corn. My sources tell me many Brazilian drivers are using up to 50% mix of ethanol to gasoline. Problem: the product face the economic disadvantage of a tariff and domestic corn subsidies, equalling a $1 p/gallon on a $3 dollar p/ gallon product.
In otherwords, if it weren't for our government and the farm lobby, the Brazilian product could immediately drop our gasoline prices by $1 p/gallon.
You may know that the high flying companies in cb ethanol, like Pacific Ethanol, once the darling of Bill Gates and others, went bankrupt in the depth of the recession.
There are lots of exciting experiments with start up companies and universities developing new ethanol sources from waste wood products. Most are working on using microbes for fermentation, with one of the most promising private companies located in Emeryville. My guess is we've still got some years before a scalable product can be developed. The signal will be when many of these small start-ups go public.
I'm much higher, no pun intended, on bio-diesel products that can be produced from a variety of inexpensive vegetative sources that can be grown on marginal land. Hemp will be key to this delivery.
