It is emergent to reduce CO2 emissions from fossil fuel combustion and thereby limit climate destabilization. In order to accomplish CO2 adsorption, there is a need for discovery of better solid CO2 adsorbents that realize great improvement of selective capacity and stability to moisture as well as significant reductions in energy requirements and costs. We provide an overview of our recent works on nanofibrous sorbents for CO2 capture and separation. A series of polymer nanofibers containing plentiful amines are successfully fabricated; these amines provide a proper adsorbate-adsorbent interaction from the viewpoints of selective capture of CO2 and energy-efficient regeneration of adsorbents. Moreover, the materials possess well-defined micropores with the dimension close to the size of adsorbate molecules and subsequently exhibit the molecule sieving effect. As a result, materials are active in selective adsorption of CO2 and show high CO2/N2 selectivity. On the other hand, we summarize the main factors for CO2 capture performance of flexible doped carbon nanofibers (CNFs) hybrid membrane under different conditions via electrospinning and subsequent carbonization treatment. CNFs are featured with relative large specific surface area, high porosity and small diameter, which allows easy access and fast mass transfer of gas molecules from the interaction region, leading to better CO2 adsorption performance. In our recent study, doped CNFs are used as robust fibrous adsorption materials for CO2 capture, which achieve a superior CO2 uptake of 6.3 mmol/g at 1.0 bar and 298 K, as well as remarkable CO2/N2 selectivity and excellent cyclability.

Electrospun nanofibrous materials for CO2 capture

253rd National Meeting (2017)

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