${log.root}/lowem.log
Inflation, Investing and Everything


All | Energy | Java | Tech | Musings | Env | Biz

AddThis Feed Button
20060303 Friday March 03, 2006

How energy-positive is ethanol, really?

peakoil.com -> notes.sej.org :

The Bush administration is more pro-ethanol than ever. In his latest state of the union address, President Bush called on Congress to "fund additional research in cutting-edge methods of producing ethanol, not just from corn, but from wood chips and stalks, or switch grass. Our goal is to make this new kind of ethanol practical and competitive within six years."

But can ethanol really offer the energy gains promised by the President? In July 2005 scientists David Pimentel and Tad W. Patzek published a controversial paper challenging the energy economics of ethanol and biodiesel. According to their research, the process of converting plants such as corn, soybeans, and sunflowers into fuel consumes much more energy than the resulting ethanol or biodiesel generates. Specifically, they said that corn requires 29% more fossil energy than the ethanol produced, for switch grass it's 45% more, and wood biomass requires 57% more fossil energy than the fuel produced.

Understandably, this research has been controversial, especially with ethanol supporters. The most recent return volley by researchers from UC Berkeley's Energy and Resources Group claims to find net energy benefits that Pimentel and Patzek overlooked. There's no easy answer to the ethanol economics debate, but it does pay to ask questions about it. When considering local sources of ethanol or biodiesel, crunch the numbers. The energy and environmental impacts of ethanol, and how they compare to those of gasoline, can vary substantially by region, feedstock (or petroleum source), and manufacturing process.

See also :

1. Bush : 'America Addicted to Oil'
2. Addiction to oil isn't limited to U.S.
3. So much for biodiesel

(2006-03-03 16:57:43 SGT) [Energy] Permalink

Comments:

Post a Comment:

Comments are closed for this entry.




Most popular blog postings on lowem.log :

1. Singapore MRT rail network length to double by 2020
2. 2010 Nissan Leaf electric car specifications : 107hp, 24KWh lithium-ion batteries, 100-mile range
3. Live spot gold price quotes chart on COMEX
4. 2010 Toyota Prius specifications released : 50 mpg, 1.8L, 134hp, Ni-MH, solar roof option
5. AVG Anti-Virus Free Edition 2011 direct download link
6. Real-time live gold and silver price quotes chart on COMEX
7. Singapore electric vehicles : Government agencies EMA and LTA to study EV introduction
8. Book review : Shut Down by William Flynn

Featured articles on lowem.log :

1. Book review : Shut Down by William Flynn
2. Singapore electric cars testing starts with 9 electric vehicles
3. Honda, GS Yuasa JV to make lithium-ion batteries for 2010/2011 Honda Civic Hybrid
4. 2010 Honda Civic Hybrid preliminary specifications released
5. 2010 Honda CR-Z hybrid, 2010 Honda Fit/Jazz hybrid models confirmed
6. 2010 Toyota Prius specifications released : 50 mpg, 1.8L, 134hp, Ni-MH, solar roof option
7. NYMEX crude oil recovers from $32.40 low after 2.2 mbpd OPEC production cut announced
8. Singapore : Nuclear power not ruled out



search
sponsored links



bookmarks

about
my profile
contact me

blogroll
biow/ken/wenn
reviewem
afternote

sites
photo gallery
wiki

quotes
live oil prices
live gold prices

charts
live forex rates
live oil chart
live brent crude chart
live gold chart
live silver chart

historical
crude oil chart
gold chart
silver chart


navigation
decals

Click for Singapore, Singapore Forecast





rss feed for lowem.log

Get Firefox!

powered by
hosted by