reduction in carbon emissions
Epicam has calculated that a technology combination of Liquid Air Energy Storage (LAES) together with CO2 capture from atmospheric air such as the filtration proposed by Climeworks AG, when implemented at a global level sufficient to eliminate the intermittency resulting from reliance on renewable energy sources, would remove sufficient CO2 from the processed air to reduce the C02 content in the atmosphere from 415 to 350 ppm in 11.6 years.
This could be done in an economically attractive industrial process of energy storage and regeneration, also yielding economically useful bi-products from the CO2 harvested.
The CO2 can be combined with Mg(OH)2, which is abundantly available as gypsum, and can deliver new permanently stable building materials. It can also be processed to form carbon neutral aviation fuel, which is already being done in Canada.
Our calculations are based on the following steps:
a) The mass of atmospheric air is 5.126 X 10e15 tons
b) The present capacity of global grid power is 6.142 TW
c) Storage power required capacity (10%) is 614,200,000 MW (Capex is £ 240K / MW*).
d) Rate of air processed by Epicam's liquefaction process for energy storage = 13.2 tons/hr/MW
e) Rate of air processed when technology is implemented globally = 65,500,000,000,000 tons/yr . This airstream would then be available for Climeworks filtration.
f) This removes 26,900,000,000 tons CO2/y
Cost per ton = Climeworks cost - airstream cost
g) Mass of CO2 required to be extracted from atmosphere to reduce content from 415 ppm to 350 ppm. = 311,000,000,000 tons
h) Therefore, if the LAES+ CO2 filter system were to be operated at maximum capacity, it would be capable of reducing the atmospheric CO2 to a level almost half way (48%) to pre-industrial in 11.6 years. This would provide a significant level of operational control over climate change.
-Anthony O. Dye, MD, Epicam Ltd.
* Estimated value