Studies of Ca-based high temperature sorbents for CO₂ capture

The natural mineral dolomite has been calcined and impregnated with Ti-, Zr-, Al-nanoparticle suspensions with the aim of improving the cyclic stabilities in high temperature CO₂ sorption processes. After impregnation and subsequent calcination the materials were characterized by N2 adsorption (BET surface area and micropore volume) and powder X-Ray diffraction while the cyclic performance in CO₂ sorption processes was evaluated by breakthrough measurements: 30 cycles with sorption in 10% dry CO₂ at 600 °C and regeneration at 850 °C in N2 were run on each sample.