![]() “Several factors for long-term storage are still unknown”Įxtraction technologies first bring ambient air into contact with a substance that absorbs the CO 2 from the air. They published the results of their study, “Understanding environmental trade-offs and resource demand of direct air capture technologies through comparative life-cycle assessment,” in the journal Nature Energy. The resulting net CO 2 extraction of 0.7-0.85 tons is comparable to the CO 2 savings from using the same amount of energy for electric cars instead of gasoline-powered cars. “The low-temperature process for CO 2 extraction proved to be surprisingly efficient,” says Kavya Madhu, “for one ton of CO 2 extraction, for example, 0.3 tons of CO 2 are currently emitted in the energy and heat supply required for this, and as little as 0.15 tons if low- CO 2 electricity is used. They also compared these values to key existing technologies and measures for CO 2 reduction, such as e-mobility and heat pumps. To do so, they determined for two common DAC processes-one at high and one at low temperature for capturing CO 2-how high their energy input, CO 2 emissions and other consumption factors are to extract one ton, one megaton and one gigaton of CO 2 from the atmosphere and inject it into deep soil layers. Stefan Pauliuk from the University of Freiburg (Faculty of Environment and Natural Resources) has now analyzed the carbon footprint of these technologies. ![]() A research team led by Kavya Madhu and Prof. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |