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Old 09-17-2013, 03:40 AM   #145 (permalink)
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Isobutanol does indeed have a higher energy density than ethanol, but it is also less volatile. Not sure if it can be used as is.
One factual untruth in the article:
The researchers can produce 1.88 grams of isobutanol per liter of fluid, the highest concentration recorded to date for transforming plant material into biofuel.
Yeast can produce up to 120 grams of ethanol per liter (15% volume).
Sunflower seeds, linseed etc. contain almost pure biodiesel.
I guess the original quote had more premisses, like "using gentech on previously unproductive organisms".

Imagine the cost of distilling purish isobutanol from a less than 0.2 % mixture.
It will need a lot of time and effort to become practical.
Nevertheless, this is a promising development.
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