Influence of tobermorite texture and specific surface area on CO2 chemisorption

Tobermorite was hydrothermally synthesized at 175 °C and characterized by XRD, SEM and BET analysis. It was determined that tobermorite is a mesoporous material. Its specific surface area SBET = 88.17 m2/g, and the radius of dominant pores rp = 60–80 Å. The experimental measurements of CO2 chemisorption by tobermorite at 25–75 °C were carried out under stationary conditions. They show that the rate of CO2 chemisorption depends on water concentration in the adsorbable. In the absence of water vapour, no CO2 chemisorption was noted. The possible mechanism of CO2 chemisorption by tobermorite was proposed.