Regeneration performance of metal-organic frameworks TG-Vacuum tests

The increasing attractiveness of the adsorption methods of CO2 capturing from coal power plant flue gas, which can be observed in recent years, is linked directly with the appearance and development of new, efficient CO2 adsorbents. The success of an adsorbent depends on the development of the material that, under flue gas temperature conditions, will have high sorption capacity and selectivity for CO2. At the same time, the ease of regeneration and the usable lifetime of the adsorbent are of key importance. The paper presents the potential of metal-organic frameworks (MOFs) for VPSA method for flue gas CO2 capture. In this study, the thermogravimetric test has been used to screen two kind of MOFs [CuBTC, MIL-53(Al)] and identification of promising materials for CO2 capture. The examination of the sorption capacity, stability and regeneration performance of metal-organic frameworks was carried out using a Mettler TGA/SDTA 851e thermobalance and TG-Vacuum system. The studies of adsorption/desorption on the MOFs showed complete desorption of CO2, which confirmed the reversible nature of the process and the ability to use in multiple cycles in VPSA unit.