Effect of total pore volume, pore diameter and pore window size on the maximum CO2 uptake capacity of the SCF materials

https://doi.org/10.1039/C8TA06224B

“Fig. 7 shows the variation of CO₂ uptake capacity as a function of the surface textural properties of the SCF materials. It is evident that the CO₂ uptake capacity increased dramatically with the total pore volume, pore diameter and window size of the SCF substrates, particularly for the SCF materials synthesised at lower TMB concentrations and/or aging temperatures. In addition, close-to-linear relationships can also be observed between the CO₂ uptake and the total pore volume for the SCF substrates with pore volumes lower than 2.2 cm³ g⁻¹ and pore diameters/window sizes below 28 nm as shown in Fig. 7(a) and (c). For the SCFs with larger pore volumes or pore diameter/window sizes, the CO₂ uptake deviated from the linear relationship toward lower CO₂ uptakes, indicating the lower amine efficiencies or that the pores could not possibly be fully impregnated with PEI to give higher CO₂ capacity.”

“Fig. 7 Effect of total pore volume, pore diameter and pore window size on the maximum CO₂ uptake capacity of the SCF materials synthesised under different conditions.”