
262 Ecological Sustainability
trying to develop inexpensive CCS for atmospheric CO
2
. GRT is developing
atmospheric CCS using NaHCO
3
as the end product, a technology that uses
signicantly less energy (Van Noorden 2007). See more about GRT LLC and
its ACCESS air-capture technology product at PRWeb (2010).
Recently, scientists at the ETH Zurich and the PSI in Switzerland described
a prototype solar energy–powered means of atmospheric CO
2
CCS. They
used trapped solar energy to drive the following uidized reactions: CO
2
+
CaO → Ca(OH)
2
→ CaCO
3
. Five consecutive 1.3 s cycles were used to com-
pletely remove 500 ppmv CO
2
from a synthetic ...