First-generation biofuels are produced in two ways. One way is through the fermentation of either starch-based food products — such as corn kernels — or sugar-based food products — such as sugar cane — into ethanol. Another way is by processing vegetable oils, such as soy, rapeseed and palm, into biodiesel.
Second-generation biofuels are made from a wider variety of nonfood sources, such as cellulose, algae and recovered waste products. Still in the early development stages, second-generation biofuels could play an integral role in diversifying the world's energy sources by greatly expanding the pool of potential feedstocks while not using food-based products for fuel. These fuels have the potential to be created from renewable resources such as switchgrass, forest and agricultural residues, municipal solid waste, and new energy crops.
Third Generation: Algae biofuels
Notes on C02 and energy in and out for Biofuels
E3 Biofuels is about to fire up the most energy-efficient corn ethanol facility in the country: a $75 million state-of the-art biorefinery and feedlot capable of producing 25 million gallons of ethanol a year. What’s more, it will run on methane gas produced from cow manure. The super-efficient operation capitalizes on a closed loop of resources available here on the prairie – cattle (fed on corn), manure (from the cows), and corn (fed into the ethanol distiller). The output: a potential gusher of renewable, energy-efficient transportation fuel.
Wired article on ethanol
Biofuels is the Hamburger Helper of Energy.
Link to the Myth of Biofuels article
Rules for Effective Biofuels
Biofuels magazine link
Bio-diesel is a fuel produced from renewable resources such as vegetable oil rather than petroleum and can be directly used as a fuel or blended with conventional diesel fuel made from petroleum (petro diesel). The benefits of bio-diesel are long: Bio-diesel can run in almost any vehicle that can run on petro diesel with few or no modifications.
Diesel makes up 22% of the ground transportation fuel in the United States
The best biofuels