Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Can carbon sequestration solve global warming?

17.02.2003


The U.S. Government is spending millions of dollars to research the feasibility of stuffing carbon dioxide into coal seams and fields of briny water deep beneath the Earth. But, a scientist at the American Association for the Advancement of Science (AAAS) Annual Meeting argues that the government isn’t thinking big enough in its plans to remove carbon dioxide from the atmosphere.



Dissatisfied with the long-term potential of most current technologies for carbon sequestration, Klaus Lackner, Ewing-Worzel Professor of Geophysics at Columbia University, has designs for new power plants that would capture carbon dioxide before it leaves the facility, as well as for "synthetic trees" that would pluck carbon from the air, mix it with magnesium silicate, and store the carbon in the "rocks" that would result from the chemical interaction between the elements.

"Injecting carbon underground is a short-term solution," Lackner said. "The oil industry has done this with 20 million tons a year in West Texas, but that is not the scale we’re talking about here. We need to find a way to put away 20 billion tons." The Intergovernmental Panel on Climate Change has estimated that worldwide carbon dioxide emissions could more than triple over the next 100 years, from 7.4 billion tons of carbon per year in 1997 to approximately 20 billion tons per year by 2100. Lackner argued that large-scale carbon sequestration would allow the continued use of carbon-based fuels during the time needed to develop alternative sources of energy.


Encouraged by preliminary reports indicating the feasibility of carbon sequestration in coal seams and deep saline reservoirs, the U.S. Department of Energy recently announced it will fund public-private ventures to explore the capture of carbon, but researchers say there are considerable barriers to be overcome before the technology can be widely implemented. Injecting carbon into coal seams, for example, would force millions of gallons of salty water to the Earth’s surface, substantially greater amounts than the briny water produced during recovery of natural gas.

"This is not a trivial problem," said Curt White, Carbon Sequestration Science Focus Area Leader at the National Energy Technology Laboratory, Pittsburgh, PA, who will report on new findings regarding the physical and chemical phenomena that take place when carbon dioxide is injected into coal seams, and discuss the projected storage capacity of coal seams.

White will detail some of the technological obstacles to performing sequestration of carbon dioxide in deep unmineable coal beds, as well as parallel efforts to identify and recover the methane gas that is found in some of those sites. The valuable gas offers hope that the cost of capturing carbon can be covered.

Water disposal is a challenge because high concentrations of salts and other dissolved solids can be toxic to some organisms, White said. "Development of technologies to properly dispose of huge amounts of produced water is a problem area that needs further research." White and his colleagues are studying surveys conducted by the U.S. Bureau of Mines to determine which coal seams in the United States might contain the most methane. The researchers are also exploring the long-term impact of pumping carbon into coal seams and brine fields.

"We now have a much better understanding of what we think is going to happen," White said. "I think that with the proper research and the right resources, the problem areas can be overcome."

The capture of carbon will not become routine, however, until steps are taken to reduce greenhouse gas emissions, according to Howard Herzog, principal research engineer at Massachusetts Institute of Technology Laboratory for Energy and the Environment.

"Unless the economic incentives are in place, the technology is not going to go anywhere," said Herzog, who studies the economics of carbon sequestration. "Right now, the price of emitting carbons is almost free. If it goes up to about $100 per ton of carbon produced, you’d begin to see some significant scale of capture and storage."


Monica Amarelo | EurekAlert!
Further information:
http://www.aaas.org/

More articles from Ecology, The Environment and Conservation:

nachricht Dead trees are alive with fungi
10.01.2018 | Helmholtz Centre for Environmental Research (UFZ)

nachricht Management of mountain meadows influences resilience to climate extremes
10.01.2018 | Max-Planck-Institut für Biogeochemie

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

Im Focus: A thermometer for the oceans

Measurement of noble gases in Antarctic ice cores

The oceans are the largest global heat reservoir. As a result of man-made global warming, the temperature in the global climate system increases; around 90% of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

White graphene makes ceramics multifunctional

16.01.2018 | Materials Sciences

Breaking bad metals with neutrons

16.01.2018 | Materials Sciences

ISFH-CalTeC is “designated test centre” for the confirmation of solar cell world records

16.01.2018 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>