Navigation Links
Ethanol-powered vehicles generate more ozone than gas-powered ones
Date:12/14/2009

get warm, a larger proportion of pollutants escapes from the tailpipe into the air.

There are other pollutants that would increase in the atmosphere from burning E85 instead of gasoline, some of which are irritants to eyes, throats and lungs, and can also damage crops, but the aldehydes are the biggest contributors to ozone production, as well as being carcinogenic.

Ginnebaugh worked with Mark Z. Jacobson, professor of civil and environmental engineering, using vehicle emissions data from some earlier studies and applying it to the Los Angeles area to model the likely output of pollutants from vehicles.

Because E85 is only now beginning to be used in mass-produced vehicles, the researchers projected for the year 2020, when more "flex fuel" vehicles, which can run on E85, will likely be in use. They estimated that vehicle emissions would be about 60 percent less than today, because automotive technology will likely continue to become cleaner over time. They investigated two scenarios, one that had all the vehicles running on E85 and another in which the vehicles all ran on gasoline.

Running a widely used, complex model involving over 13,000 chemical reactions, they did repeated simulations at different ambient temperatures for the two scenarios, each time simulating a 48-hour period. They used the average ozone concentrations during each of those periods for comparison.

They found that at warm temperatures, from freezing up to 41 degrees Celsius (give F conversion), in bright sunlight, E85 raised the concentration of ozone in the air by up to 7 parts per billion more than produced by gasoline. At cold temperatures, from freezing down to minus 37 degrees Celsius, they found E85 raised ozone concentrations by up to 39 parts per billion more than gasoline.

"What we are saying with these results is that you see an increase," Ginnebaugh said. "We are not saying that this is the exact magnitude you are going to
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert

0

GOOD

Page: 1 2 3

Related biology news :

1. Chasing tiny vehicles
2. Healing wounds with lasers, vehicles that drive themselves, other cutting-edge optics
3. Unmanned aerial vehicles mark robotic first for British Antarctic Survey
4. RAND paper finds diesel, hybrid vehicles can provide more societal benefits than gas-powered autos
5. Supportive materials will help regenerate heart tissue
6. $2.4 million stimulus fuels effort to regenerate injured spinal cords
7. Stem cell success points to way to regenerate parathyroid glands
8. P[acman]-generated fruit fly gene library: A new research tool
9. Gene therapy appears safe to regenerate gum tissue
10. Cellulosic biofuel technology will generate low-cost green fuel, says major study
11. Researchers generate functional neurons from somatic cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/17/2013)... Federation of American Societies for Experimental Biology (FASEB) released ... Health (NIH) funding trends highlighting the devastating impact of ... The FASEB analysis follows a May 15th Senate Appropriations ... who testified that the $1.6 billion cut the agency ... a substantial impact on the scientific community." , ...
(Date:5/16/2013)... fast food restaurant had a higher body mass index ... food, according to researchers at The University of Texas ... strong among those with a lower income. , ... Journal of Public Health indicates higher BMI associates ... among lower-income African-Americans, the density, or number, of fast ...
(Date:5/16/2013)... 2013 The relationship between the heritable risk ... been clear. Schizophrenia is commonly associated with cognitive ... clues that reduced IQ may be linked to ... cognitive ability may precede the onset of schizophrenia ... healthy relatives of people diagnosed with schizophrenia. , ...
Breaking Biology News(10 mins):Body mass index of low income African-Americans linked to proximity of fast food restaurants 2Body mass index of low income African-Americans linked to proximity of fast food restaurants 3Genetic risk for schizophrenia is connected to reduced IQ 2
... Drop that doughnut. In a study called "Good ... from the National Cancer Institute, health researchers at Brown ... produce market within workplaces will motivate higher employee fruit ... studies like this," said Kim Gans, research professor of ...
... (Santa Barbara, Calif.) In the world of biology, having a ... honors for a scientist. Just ask Armand Kuris, professor of zoology ... Santa Barbara. A new species of worm the Carcinonemertes ... is named after you, that is forever," said Kuris. "It,s quite ...
... pertaining to science and technology, "talking it out" doesn,t seem ... shows that the more people discuss the risks and benefits ... their viewpoint and the less likely they are to ... the difficulty facing state and federal policy leaders when it ...
Cached Biology News:Would convenient access to affordable fresh produce improve eating habits? 2Would convenient access to affordable fresh produce improve eating habits? 3New ribbon worm named after UCSB scientist 2More talk, less agreement: Risk discussion can hurt consensus-building on science/technology 2
(Date:5/20/2013)... 20, 2013  (PSHR) Pacific Shore Holdings, Inc. ... across a broad range of product categories lines, ... relations firm, BlueWater Advisory Group, to provide strategic ... process, and to direct the company,s outreach and ... Matthew Mills , Pacific Shore ...
(Date:5/20/2013)... , May 20, 2013   BioHealth ... focusing on commercializing market-relevant biohealth innovations and increasing ... Maryland , today announced its selection of ... (EIR) for BHI at the National Institutes of ... Institute (NHLBI). Dr. Aiyar will help advance ...
(Date:5/20/2013)... 2013 Interventional cardiologist Tony Farah, MD, ... (AGH) Cardiovascular Institute have helped pioneer many breakthroughs ... (CAD) over the past three decades, from new ... and coronary artery stent implantation. , Today, AGH officials ... prominent role in the study of a novel, first-of-its ...
(Date:5/20/2013)... (PRWEB) May 20, 2013 Kitware, a ... visualization tool that enables the exploration of hospital ... created in response to the recent release of “Medicare ... the top 100 most-billed procedures from the Centers for ... costs for similar procedures at hospitals across the country ...
Breaking Biology Technology:Pacific Shore Holdings Retains Investor Relations Firm 2BioHealth Innovation, Inc. Names Ram Aiyar as Entrepreneur-in-Residence to NIH National Heart, Lung and Blood Institute 2BioHealth Innovation, Inc. Names Ram Aiyar as Entrepreneur-in-Residence to NIH National Heart, Lung and Blood Institute 3BioHealth Innovation, Inc. Names Ram Aiyar as Entrepreneur-in-Residence to NIH National Heart, Lung and Blood Institute 4Allegheny General Hospital Cardiovascular Institute Becomes Exclusive Pittsburgh Site for Study of Novel Coronary Artery Disease Device 2Allegheny General Hospital Cardiovascular Institute Becomes Exclusive Pittsburgh Site for Study of Novel Coronary Artery Disease Device 3Allegheny General Hospital Cardiovascular Institute Becomes Exclusive Pittsburgh Site for Study of Novel Coronary Artery Disease Device 4Kitware Enables Interactive Exploration of CMS Medicare Data 2
... even the resources of the world,s largest industrialized nations, scientists ... to find solutions. , Mark Shannon of the University of ... water resource research to address this crisis in a review ... "As dire as the growing problems are with a lack ...
... Blacksburg, Va. -- The ubiquity of mineral nanoparticles in ... intriguing properties provide Earth scientists with another dimension in ... team of scientists from seven universities in a review ... Nanominerals, Mineral Nanoparticles, and Earth Chemistry. , The way ...
... March 20 Scientists at the,Bio-Communications Research ... for,the Improvement of Human Functioning International (CIHFI), ... about its recent stem cell,discovery. The scientific ... stem cell population" received BioMed Central,s,Research Article ...
Cached Biology Technology:Countering an approaching water crisis 2Nanoscience will change the way we think about the world 2Nanoscience will change the way we think about the world 3Nanoscience will change the way we think about the world 4Nanoscience will change the way we think about the world 5Medical Research Award Goes to Adult Stem Cell Scientists at a Kansas Not-for-Profit Organization 2
...
... a-Amylase is an enzyme that catalyzes ... of maltose, maltotriose, and dextrins. The,level ... the human body is of,clinical significance ... including,pancreatitis and diabetes; plant and microbial ...
... Jouan MSC series of Class II ... conditions and certification to the world's ... ensures that the cabinets cannot be ... Natural lighting, low noise and arm ...
... Ascent FL is equipped ... luminometric measurement technologies that ... of advanced features of ... Ascent. Fluoroskan Ascent FL ...
Biology Products: