Decarbonisation Technology - November 2022

been defined in order to reach the targets described in the 3D project section. The operating time of the pilot unit is distributed in two different types of tests: • Eight months dedicated to a set of parametric studies • Six months invested in performing a long- term test to demonstrate the stability and robustness of the DMX Process over time under stabilised conditions Several operating conditions, such as the quality of the solvent regeneration, the solvent and raw gas temperatures, or the absorption and regeneration pressures, will be studied to optimise the energy consumption of the Process for different CO 2 capture applications. Solvent emissions in treated gas and extracted CO₂ will be measured, and specific tests will be performed to optimise the operating parameters to limit those solvent emissions. Several solvent samplings over time will be obtained to characterise solvent stability. The composition of the solvent and degradation compounds composition will be monitored. Several metal coupons will be installed and analysed to monitor corrosion over time of different material metallurgies. Similarly, different elastomer coupons installed in several sections of the process will be analysed to evaluate seal material stability. Conclusions DMX is an innovative CO₂ capture absorption process technology developed by IFPEN with significantly improved performance compared with existing solvent. Its energy requirements are typically 30% less than conventional MEA solvent. This technology is being demonstrated in an industrial pilot unit treating blast furnace gas from ArcelorMittal‘s steel mill plant in Dunkirk, France. As of today, the pilot is under start-up, and the first results will be available soon. More detailed results will be presented once available in the coming months. Acknowledgement This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 838031. The project also received support by “Le programme d’investissements d’avenir (PIA)” operated by ADEME.

Figure 4 View of the installed pilot (PAU 100 one the right and PAU 200 on the lower left) (PAU = Pre-Assembled Unit) Credit: IFPEN/Axens


Christian Streicher


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