Development of Amine-Modified Solid Sorbents for Postcombustion CO 2 Capture

Amine-modified solid sorbents are potentially good candidates for postcombustion CO2 capture. We synthesized a series of amine-modified mesoporous silica sorbents, and measured their CO2 adsorption capacities. Among them, mesoporous silica MSU-H modified with (3-trimethoxysilylpropyl)diethylenetriamine, denoted by TA/MSU-H(II), showed high CO2 adsorption capacity of 3.08 mmol/g-sorbent at 60°C with 15kPa of CO2, 12kPa of H2O vapor and 74kPa of N2 as similar as the postcombustion CO2 capture condition. Furthermore, we confirmed that the CO2 adsorption capacity of TA/MSU-H(II) after 30 cycles of the adsorption at 60°C and the desorption at 120°C was 2.98 mmol/g-sorbent.