Synthesis of CO2 Adsorbent with Various Aminosilanes and its CO2 Adsorption Behavior

다양한 아미노실란을 이용한 이산화탄소 흡착제 합성 및 흡착 특성

  • Jeon, Jae Wan (Department of Chemical Engineering, Kongju National University) ;
  • Ko, Young Soo (Department of Chemical Engineering, Kongju National University)
  • Received : 2015.12.24
  • Accepted : 2015.12.30
  • Published : 2016.02.10


The carbon dioxide adsorption behavior of silica with a large specific surface area and pore volume functionalized with aminosilane compounds via in-situ polymerization and functionalization method were investigated. The organosilanes include amino functional group capable of adsorbing carbon dioxide. Elemental analyzer, in situ FT-IR and thermogravimetric analyzer were used to characterize the sorbents and to determine their $CO_2$ adsorption behavior. Comparison of different aminosilane loading in the support revealed that polyaminosilane functionalization of 70% of the pore volume in the support was better in terms of the adsorption capacity and amine efficiency than that of 100% of the pore volume of the support. Furthermore, the sorbents showed a higher adsorption capacity at an adsorption temperature of $75^{\circ}C$ than at $30^{\circ}C$ due to the thermal expansion of synthesized polyaminosilanes inside the pore of silica. The N-[3-(trimethoxysilyl)propyl]ethylenediamine (2NS) sorbent with 70% of the pore volume functionalized showed the highest adsorption capacity of 9.2 wt% at $75^{\circ}C$.


Supported by : 한국연구재단


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