Where you have such alkaline wastes, clearly they can (and IMHO should)
be used to mineralise CO2, and great if you can generate power at the
same time. But the main question surely is: how great is that resource?
Use 100% of it for CO2 fixation, and how much does it add up to? Oliver.
On 07/03/2015 09:17, Andrew Lockley wrote:
http://link.springer.com/article/10.1007%2Fs11431-014-5727-6
China Technological Sciences
December 2014, Volume 57, Issue 12, pp 2335-2343
Date: 11 Dec 2014
Generation of electricity from CO2 mineralization: Principle and
realization
HePing Xie et al
Abstract
Current CO2 reduction and utilization technologies suffer from high
energy consuming. Thus, an energy favourable route is in urgent
demanding. CO2 mineralization is theoretically an energy releasing
process for CO2 reduction and utilization, but an approach to recovery
this energy has so far remained elusive. For the first time, here we
proposed the principle of harvesting electrical energy directly from
CO2 mineralization, and realized an energy output strategy for CO2
utilization and reduction via a CO2-mineralization fuel cell (CMFC)
system. In this system CO2 and industrial alkaline wastes were used as
feedstock, and industrial valuable NaHCO3 was produced concomitantly
during the electricity generation. The highest power density of this
system reached 5.5 W/m2, higher than many microbial fuel cells. The
maximum open circuit voltage reached 0.452 V. Moreover, this system
was demonstrated viable to low concentration CO2 (10%) and other
carbonation process. Thus, the existing of an energy-generating and
environmentally friendly strategy to utilize CO2 as a supplement to
the current scenario of CO2 emission control has been demonstrated.
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