Sequestration of Carbon
Dioxide using "Higee"
In view of the current CO2
emission legislation many companies are becoming
interested in new technology which will allow
them to capture and the sequester CO2 which is
present in stack gases. As the Norwegian
government is taking this issue very seriously, Norsk Hydro has supported a 3-year experimental
programme at Newcastle to demonstrate the use of
Monoethanolamine solutions to absorb CO2 from
simulated flue gases. The equipment used is the
rotating packed bed (Higee) gas/liquid contactor
which was conceived and developed by Ramshaw in
the 1980's when he was at ICI.
The unit comprises a rotor
45cm OD with an axial packing thickness of
2.5cm. The effective radial packing depth is
12cm and the rotor speed is varied up to
1000 RPM. CO2 recoveries up to 99% were achieved.
This technology is particularly relevant to
offshore exploitation in view of the very
compact nature of the Higee configuration. A
further development under construction involves
an integral reboiler for steam generation.
Fig. 1 - New
facility to test
amines for CO2
Fig. 2 -