271799 Oxidation & Degradation Studies of Aminosilica Adsorbents
The direct extraction of CO2 from the ambient atmosphere, or “air capture,” has the potential to reduce the global atmospheric CO2 concentration and has been gaining significant attention in the academic and industrial world as of late. It has been demonstrated by our group and others[1-11] that amine oxide materials are a good candidate for air capture applications. From initial studies it has been determined that primary amines are the most promising amine type for air capture as it has the highest adsorption capacity and amine efficiency at ultra-low CO2 partial pressures, as well as enhanced water uptake properties which can lead to cooperative adsorption and therefore even greater CO2 uptake. Additionally, previous work in our group has shown that class 2 primary aminosilicas possess oxidative stability under high temperature treatments. Therefore, in this work, the effect of different primary amine structures towards oxidative stability as well as CO2 adsorption capacity are being performed to further elucidate favorable structural properties for optimal air capture adsorbent design.
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