Nessi, E., Lamprou, E., Stergioudi, F., Michailidis, N., Seferlis, P., Hall, J., & Papadopoulos, A. (2024). Combined Physical Property and Corrosion Assessment of Advanced Solvents for CO2 Capture Systems. 17th International Conference on Greenhouse Gas Control Technologies (GHGT-17), Calgary, Canada.
Haslam, A., Galindo, A., Adjiman, C., & Jackson, G. (2024, June). Modelling the phase behaviour of fluid systems relevant for carbon capture processes: the importance of SOx and NOx. 33rd European Symposium on Applied Thermodynamics (ESAT 2024), Edinburgh UK.
EQUILIBRIUM, KINETIC AND CORROSION TESTING WITH THE ADVANCED APBS - CDRMAX SOLVENT
Activities
Experimental measurements of the CO2 solubility in APBS-CDRMax®, under the influence of flue gas compositions that have high concentrations of sulphur and nitrogen oxides.
Characterisation of the solvent after it was subjected to aging for up to 30 days and at temperatures up to 120oC, under the influence of oxides and air and in the presence of stainless steel specimens. Properties that were measured included amine loss, viscosity, density and metal ions in the liquid.
Inspection of the metal specimens under electron microscopy and energy dispersive X-ray spectroscopy (SEM – EDS) for evidence of corrosion and deposition of degradation products. The study also employed a range of electrochemical techniques, including Open Circuit Potential measurements (OCP), Potentiodynamic and Cyclic Polarisation curves, and Electrochemical Impedance Spectroscopy (EIS), to provide insights into the corrosion behaviour.
A model has been developed based on the SAFT-γ Mie equation of state regarding the inclusion of sulphur and nitrogen oxides in mixtures of CO2 amine and water.
Key results
The APBS-CDRMax® solvent exhibited much higher capture capacity and 20 times better corrosion performance than reference solvent monoethanolamine (MEA).
It also exhibited high resilience in the presence of a large concentration of contaminants such as sulphur and nitrogen oxides.
APBS-CDRMax® solvent enables protection to corrosion of SS316L and SS304L even after intense oxidative conditions.
A corrosion inhibitor has been identified that enables further corrosion reduction.
Parameters have been developed for the prediction of phase and chemical equilibria in CO2 capture systems that may account for the presence of sulphur and nitrogen oxide species. The following interactions have been derived:
N2–CO2; NO2–CO2; NO–CO2; NH2–CO2; N2–H2O; O2–H2O; SO2–N2; SO2–CH2; SO2–CH3; SO2–CH2OH; SO2–NH2; SO2–NO; N2–NO; NO–NO2; NO–CH2; NO–CH3; NO–NH2; NO2–O2; NO2–N2; NO2–CH2; NO2–CH3; NO2–NH2; C–NH2; C–CO2.
This has enormous practical value, as it is possible to derive predictions for realistic flue gas compositions. The model is based on SAFT-γ Mie equation of state that may be applied to a wide range of settings, including CO2 capture from industrial effluents, but also in the context of direct air capture or capture from natural streams. The model is transferable to other industries, e.g. pharmaceuticals or agrochemicals. The parameters can be used through both commercial (gPROMS) and open source (Clapeyron.jl) software.
DESIGN AND CONSTRUCTION OF PILOT PLANT
Activities
Significant preparatory work has been undertaken with respect to the design and construction of the capture plant.
HAZOP, HAZID and ATEX analysis took place to determine any necessary improvements that ensure the delivery of a safe plant that is acceptable for use.
The work included the development of 3D layouts of the plant and its virtual placement and connection to the host sites.
Key results
The 10t/d CO2 capture pilot plant of HiRECORD has been constructed.
- The plant has unique design features, such as the dual absorber and the advanced RPB desorber with integrated stripper and reboiler
DEMONSTRATION OF ADVANCED RPB CAPTURE PLANT AT 3 INDUSTRIAL SITES IN EUROPE (QUICKLIME, POWER GENERATION, REFINERY)
The capture plant will be installed and tested in a quicklime production plant, a natural gas-fired power plant and an industrial gas boiler.
The sites have performed preparatory work pertaining to positioning, connecting and permitting of the capture plant.
[1] Robinson Medici, A., Kantouros, B., Prousalis, T., de Vries, W., Seferlis, P., Papadopoulos, A., & Papadokonstantakis, S. (2025). Life-Cycle Assessment of Solvent-based Post-Combustion Carbon Capture, Storage and Utilization (CCS/CCU) using Rotating Packed Bed (RPB) reactors. Trondheim CCS Conference (TCCS-13), Trondheim, Norway.
https://doi.org/10.5281/zenodo.16406855
[2] Kantouros, B., Kazepidis, P., Papadopoulos, A.I., Seferlis, P., Rotating packed beds for post-combustion CO2 capture: Holistic process modeling and plant design, Chemical Engineering Science.
https://doi.org/10.1016/j.ces.2025.122466
[3] Kazepidis, P., Seferlis, P., & Papadopoulos, A. (2024). Energy Recovery Strategies in CO2 Compression Using an Integrated Supercritical Rankine Cycle. Chemical Engineering Transactions, 114, 559–564.
https://doi.org/10.3303/CET24114094PERFORM SCALE-UP, UTILIZATION AND SEQUESTRATION STUDIES CONSIDERING AN INDUSTRIAL CLUSTER
A framework for the LCA has been developed, considering data regarding solvent degradation products and models for solvent reclaiming [1].
A process model considering integrated RPB-based absorption/desorption has been developed and validated [2].
The developed RPB-based process model has exhibited an excellent match with experimental data, as it showed a 2.2-4% average deviation in indicators like lean loading, reboiler duty, absorber CO2 gas fraction and liquid temperature. [2]
By using waste heat from the compression system after the CO2 capture plant it would be possible to enable 60% reduction in capture plant energy requirements due to the use of a heat pump.
The supercritical CO2 compression system integrates a Rankine cycle with the CO2 as the working fluid.
For a low flue gas flowrate in the emission plant the OPEX gains compared to having a conventional compression system are 4.4%.
For the case of a high CO2 flowrate with very low CO2 concentration 5.6% reduction in cooling requirements were observed. [3]
PERFORM SOCIETAL STUDIES AND POLICY ASSESSMENT TO INVESTIGATE THE EFFECTS OF THE DEVELOPED TECHNOLOGIES ON SOCIETY
An e-module has been developed and is available in the HiRECORD web-site to educate societal stakeholders regarding CCUS (Link).
This has resulted after successfully engaging a range of stakeholders, including industry representatives, governmental, regional and local authorities, media representatives who inform the broader public, as well as laypeople and individuals living near industrial areas.
We familiarized these stakeholders with CCUS and raised awareness through seminars.
Positive feedback from focus group participants and the scientific findings from our quantitative study demonstrated the effectiveness of our intervention in increasing social acceptance and perceived benefits of CCUS technologies, while reducing risk perceptions.
