The Adsorption of CO2 on Amine Modified Mesoporous Silica

• Main Authors: Fang-Yi, Chang, 張舫嫕
• Other Authors: Kuei-jung Chao
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/34545585920400655224

碩士 === 國立清華大學 === 化學系 === 96 === In this thesis, mesoporous silica of one-dimensional channel structure loaded with amine was used for CO2 adsorption. Cylindric mesoporous silica MCM-41, SBA-15 or pore-expanded SBA-15 silicas were used as supports for grafting 3-aminopropyl-triethoxysilane (mono-amine), N-[3-(trimethoxysilyl) propyl]ethylene diamine (di-amine), or N-[3-(trimethoxysilyl)propyl] diethylene triamine (tri-amine). The pore structure of amine-functionalized silicas was characterized by powder X-ray diffraction and N2 adsorption /desorption at 77 K, and their carbon dioxide adsorption capacity was also examined. Fuethermore, the nitrogen content and thermal stabilities of amine-functionalized SBA-15 were analyzed by elemental and thermal gravimetric methods. The reaction mechanism of CO2 adsorption on amine-grafted SBA-15 have been proposed in the presence and absence of water vapor, and confirmed by Infrared spectroscopy. The captured CO2 could be almost completely removed from amine-SBA-15 at 120 oC detected by TGA-MS.