Calcium Carbonate Looping (CCL) is a highly
efficient post-combustion CO2 capture
technology utilizing limestone based sorbents
(see Fig.1). CCL is particularly suited for
retrofitting power plants as well as industrial plants (cement,
steel, etc.). For power plant applications, CCL combines
low net efficiency penalties of 5-7 %-points (incl. CO2
compression) with low CO2 avoidance costs below
30 €/tCO2. The feasibility of CCL has been proven by various
pilot plants.
The SCARLET project aims to bring CCL to the next level
of maturity by obtaining reliable information and tools for
scale-up of the technology, including the following activities:
- Pilot testing at 1 MWth scale
- Development of scale-up tools
- Engineering for a 20 MWth pilot plant
- Techno-economic/environmental assessment for power,cement, steel sector
A highly qualified consortium consisting of academic partners
(Technische Universität Darmstadt, University of Ulster, CERTH),
technology providers (GE Carbon Capture, Steinmüller
Babcock Environment, Lhoist, SWR Engineering) and end users
(Uniper, RWE, ArcelorMittal, CEMEX) provides the expertise
that is required for successful scale-up of the CCL technology.
Four long-term pilot tests (4 weeks each, 24/7) have been
performed at the 1 MWth pilot plant at TU Darmstadt (see
Fig. 2). CO2 was continuously captured for more than 1,200
hours from coal originated flue gas under a wide range of
conditions. Overall CO2 capture efficiencies up to 97% were
achieved proving the high potential of the process.
Scale-up tools have been developed and validated against
experimental data of the pilot tests. These include a steadystate
process model for heat and mass balance, a dynamic
process model for flexibility evaluation as well as various
Computational Fluid Dynamics (CFD) approaches for 3D
reactor simulation of fluidized bed reactors.
A 20 MWth pilot plant will most probably be next step
towards full-scale demonstration of CCL technology. The
basic design and engineering of such a pilot plant are
carried out considering UNIPER’s Emile Huchet (France)
hard coal power plant as the host site. Health and safety
analysis as well as technical risk assessment are conducted
for this pilot plant.
The full-scale integration of CCL into various power
(hard coal, lignite) and industrial (cement, steel) plants is
assessed for selected host sites of the industrial partners.
Heat and mass balances for various retrofit scenarios are
established to determine the energy requirements as well
as CO2 avoidance costs. The environmental impact of the
technology is assessed by life cycle analysis (LCA).
Save the Date! – The 2nd Public Workshop will take place
on 23rd March 2017 at Technische Universität Darmstadt
presenting the final results of the SCARLET project. There
will be the possibility to visit the CCL pilot plant. The
workshop will be free of charge. Registration can be made
via email.
This project is funded by the European Union's 7th Framework Programme under grant agreement no. 608578.
Contact details:
www.project-scarlet.eu
Email: info@project-scarlet.eu