Featured Research

from universities, journals, and other organizations

Imagine No Restrictions On Fossil-Fuel Usage And No Global Warming

Date:
April 15, 2002
Source:
Los Alamos National Laboratory
Summary:
Researchers at the U.S. Department of Energy's Los Alamos National Laboratory are studying a simple, cost effective method for extracting carbon dioxide directly from the air - which could allow sustained use of fossil fuels while avoiding potential global climate change.

ORLANDO, Fla., April 9, 2002 - Researchers at the U.S. Department of Energy's Los Alamos National Laboratory are studying a simple, cost effective method for extracting carbon dioxide directly from the air - which could allow sustained use of fossil fuels while avoiding potential global climate change.

The method would allow researchers to harvest carbon dioxide from the air, reducing buildup of the so-called "greenhouse gas" in the atmosphere and allowing it to be converted into fuel. A Los Alamos-led research team today presented the topic at the 223rd annual meeting of the American Chemical Society in Orlando, Fla.

"Fossil fuel supplies are plentiful, and what will limit the usage of fossil fuels is the potential climatic and ecosystem changes you may see as a result of rising CO2 levels in the atmosphere," said Los Alamos researcher Manvendra Dubey. "If you can capture atmospheric carbon dioxide, then you limit the environmental impact of fossil fuels and you can continue to use them. We have come up with a way to capture and sequester the carbon dioxide that we are putting in the atmosphere. Our approach is particularly well suited to capturing CO2 from numerous small sources such as automobiles that are largely being ignored."

While many scientists are working on capturing or sequestering carbon, Dubey and his colleagues' method differs because it works on a dilute stream of CO2 in the atmosphere as opposed to capturing more concentrated forms found in power plant exhausts. The method uses ordinary air with its average carbon dioxide concentration of about 370 parts per million.

It utilizes the wind and natural atmospheric mixing to transport CO2 to a removal site, and it is the only means available to capture CO2 generated from transportation sources and small, dispersed sources that account for nearly half of all carbon dioxide emissions.

The air is passed over an extraction agent, for example a solution of quicklime, the active agent in some cement. As the air passes over the extraction structure, the carbon dioxide in the air reacts with the quicklime and becomes converted to calcium carbonate (limestone), a solid that forms and falls to the bottom of the extractor.

The calcium carbonate is then heated to yield pure carbon dioxide and quicklime, which is recycled back into the extractor. The purified and liberated carbon dioxide can then be sequestered as a gas by direct injection into the ground or it could be reacted with minerals to form a solid. Carbon dioxide gas also can be sold commercially to the petrochemical industry, which uses large quantities of it to extract fossil fuels. Of course, because the process uses existing air, it does not need to be located near any particular elevated source of carbon dioxide. It captures carbon dioxide from all sources by harnessing wind as a no-cost transportation vector.

"The carbon dioxide comes to the facility on its own," Dubey said. "And because treated air is discharged, the overall concentration of carbon dioxide in the atmosphere gradually decreases over time. Using this method on a large enough scale, it may be possible to return atmospheric carbon dioxide levels to pre-Industrial-Age concentrations. Given the possibility our climate system can change abruptly, this possibility is very exciting."

Cost of the entire process is equivalent to about 20 cents per gallon of gasoline - a nominal cost when one considers the recent price fluctuations at gasoline pumps across the nation, Dubey said. A typical extraction facility that could extract all current carbon dioxide emissions would require only an area of one square yard per person in the developed world. A facility of sufficient size could be located in arid regions, since discharged air that is deficient in carbon dioxide could have consequences on nearby plant life.

Large expanses of desert would not be affected by the CO2 deficit however, and could provide the wide-open spaces necessary both for the facility and to allow the discharged air to become well mixed with the atmosphere again.

The next step for Dubey and his colleagues is to use intense computer models to optimize the configuration of the extractor as well as design alternative chemicals for extraction. Dubey's research colleagues include Hans Ziock, Scott Elliott and William S. Smith of Los Alamos; Klaus Lackner, formerly of Los Alamos and now also at Columbia University; and Pat Grimes of Grimes Associates of Scotch Plains, N.J. Los Alamos National Laboratory is operated by the University of California for the National Nuclear Security Administration (NNSA) of the U.S. Department of Energy and works in partnership with NNSA's Sandia and Lawrence Livermore national laboratories to support NNSA in its mission.

Los Alamos enhances global security by ensuring the safety and reliability of the U.S. nuclear stockpile, developing technologies to reduce threats from weapons of mass destruction, and solving problems related to energy, environment, infrastructure, health and national security concerns.


Story Source:

The above story is based on materials provided by Los Alamos National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

Los Alamos National Laboratory. "Imagine No Restrictions On Fossil-Fuel Usage And No Global Warming." ScienceDaily. ScienceDaily, 15 April 2002. <www.sciencedaily.com/releases/2002/04/020412080812.htm>.
Los Alamos National Laboratory. (2002, April 15). Imagine No Restrictions On Fossil-Fuel Usage And No Global Warming. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2002/04/020412080812.htm
Los Alamos National Laboratory. "Imagine No Restrictions On Fossil-Fuel Usage And No Global Warming." ScienceDaily. www.sciencedaily.com/releases/2002/04/020412080812.htm (accessed September 19, 2014).

Share This



More Earth & Climate News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Wildfires in CA Burn Forest Asunder

Raw: Wildfires in CA Burn Forest Asunder

AP (Sep. 18, 2014) An out-of-control Northern California wildfire has nearly 2,800 people from their homes as it continues to grow, authorities said Thursday. Authorities said a man has been arrested on suspicion of arson for starting the fire on Saturday. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Man Floats for 31 Hours in Gulf Waters

Man Floats for 31 Hours in Gulf Waters

AP (Sep. 16, 2014) A Texas man is lucky to be alive after he and three others floated for more than a day in the Gulf of Mexico when their boat sank during a fishing trip. (Sept. 16) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins