TY - JOUR AU - Viet Quang, Dang AU - Duong, Dao Van AU - Hong Ha, Vu Thi AU - Duc, Dao Sy AU - Ngoc Dung, Tran Thi AU - Abu-Zahra, Mohammad R.M. PY - 2020/03/13 TI - Evaluation on the Stability of Amine-Mesoporous Silica Adsorbents used for CO2 Capture JF - VNU Journal of Science: Earth and Environmental Sciences; Vol 36 No 1DO - 10.25073/2588-1094/vnuees.4549 KW - N2 - Amine-mesoporous silica has been considered as a promising CO 2 adsorbent with high potential for the reduction of energy consumption and CO 2 capture cost; however, its stability could greatly vary with synthetic method. In this study, adsorbents prepared by impregnating different amines including polyethylenimine (PEI) and 3-aminopropyltriethoxysilane (APTES) onto mesoporous silica were used to evaluate the effect of amines selection on the stability of adsorbents used in CO 2 capture process. Results revealed that APTES impregnated mesoporous silica (APTES-MPS) is more stable than PEI-impregnated mesoporous silica (PEI-MPS); APTES-MPS was thermally decomposed at ≈280 o C, while PEI-MPS was thermally decomposed at ≈180 o C only. PEI-MPS was particularly less stable when operating under dry condition; its CO 2 adsorption capacity reduced by 22.1% after 10 adsorption/regeneration cycles, however, the capacity can be significantly improved in humid condition. APTES-MPS showed a greater stability with no significant reduction in CO 2 capture capacity after 10 adsorption/regeneration cycles. In general, APTES-MPS adsorbent possesses a higher stability compared to PEI-MPS thanks to the formation of chemical bonds between amino-functional groups and mesoporous silica substrate. Keywords: Mesoporous silica; CO 2 capture; Adsorption; Regeneration; Emission. UR - https://js.vnu.edu.vn/EES/article/view/4549