Store the greenhouse gas in the deep rocks


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Scientists from the Technical University of Berlin are looking for ways
storing the gas CO2 greenhouse in rocks. When fossil fuels have definitely disappeared from the earth, we can use the gas stores as a source of carbon dioxide.
From 2005 under the Kyoto Protocol and the protection
climate, emission of CO2 must be reduced by 25% over
1990.
About 10000 European facilities are concerned by these measures, among which 2500 in Germany. The first concerns are electricity suppliers, but also refineries, coking plants,
steel industries as well as major energy consumers.
Germany is by far the largest producer of CO2 in Europe. In order to
reduce emissions of CO2 in the atmosphere, it was thought to store
direct greenhouse gas underground.
The teacher. Dr. Wilhelm Dominik of the Institute of Earth Sciences at the Technical University (TU) in Berlin is studying appropriate storage techniques, including the traditional storage of natural gas. And unlike natural gas, carbon dioxide is neither flammable nor explosive and can be transported safely using pipelines or tank trucks. When stored at great depth - optimally between 700 and 1200 meters - the gas becomes liquid and in the appropriate geological structures, it does not escape.
Porous rocks, ideally the sandstone or limestone are most appropriate for the geological storage. The old cavities of gas or oil are another option for storing CO2 in the rock.
Disposal at sea, which is the only natural storage site for CO2, is still today denied due to environmental constraints.
Dr. Dominik's team analyzes the properties of rocks in the laboratory and
simulates the interaction with the liquid phase. The geometry of structures
of appropriate rocks is reconstructed on the basis of seismic data, and
representations in 3-D are created with the help of the mathematicians of the
TU to simulate and visualize the flow processes.

contacts:
- Teacher. Dr. Wilhelm Dominik - Fakultat VI Bauingenieurwesen und Angewandte
Geowissenschaften - tel: + 49 (0) 30 314 25903 - E-mail:
wilhelm.dominik@tu-berlin.de -
http://www.tu-berlin.de/presse/pi/2004/pi269.htm
Sources: Depeche IDW, Press release from TU Berlin, 25 / 10 / 2004
Editor: Nicolas Condette, nicolas.condette@diplomatie.gouv.fr

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