It gives me no pleasure in relaying this information. Biofuel technology is going to need a huge technological improvement to become a viable solution. At the moment, our "leaders" are wasting time with these distractions. What we need are increased fuel economy standards for automobiles.
http://www.sehn.org/tccpdf/Energy-biofuel%20outputs%20&inputs.pdfCONCLUSION
Several physical and chemical factors limit the
production of liquid fuels such as ethanol and
biodiesel using plant biomass materials.These include
the following:
(1) An extremely low fraction of the sunlight
reaching America is captured by plants. On
average the sunlight captured by plants is
only about 01.%, with corn providing 0.25%.
These low values are in contrast to photovoltaics
that capture from 10% or more sunlight,
or approximately 100-fold more sunlight
than plant biomass.
(2) In ethanol production the carbohydrates
are converted into ethanol by microbes,
that on average bring the concentration of
ethanol to 8% in the broth with 92% water.
Large amounts of fossil energy are required
to remove the 8% ethanol from the 92%
water.
(3) For biodiesel production, there are two problems:
the relatively low yields of oil crops
ranging from 1,500 kg/ha for sunflower to
about 2,700 kg/ha for soybeans; sunflower
averages 25.5% oil, whereas soybeans average
18% oil. In addition, the oil extraction
processes for all oil crops is highly energy
intensive as reported in this manuscript.
Therefore, these crops are poor producers of
biomass energy.