https://doi.org/10.1016/j.jiec.2017.05.018
“The influence of the TEPA loaded capacity of HPS on the CO2 adsorption performance has been investigated at 75 °C with a N2 stream containing 15 vol.% CO2. And the experiment was carried out at atmospheric pressure which is important to be considered that the flue gases on the commercial scale are released at this pressure.
The CO2 adsorption performance is shown in Fig. 7. For the TEPA modified MCM-41system, CO2 adsorption capacity was 2.17, 2.6, and 3.01 mmol/g, with an increase of TEPA load capacity to 30, 40, and 50 wt.%, respectively. When the TEPA load capacity was further increased to 60 wt.%, the amount of CO2 capture decreased to 2.49 mmol/g. It indicated that MCM-41-TEPA-50% had the maximum adsorption capacity.”
“Fig. 7. Comparison of CO2 sorption capacities with amine loading levels: (a) TEPA modified HPS; (b) TEPA modified MCM-41.”
“However, for the TEPA modified HPS system, it exhibited a maximum CO2 adsorption capacities of 5.01 mmol/g when 60 wt.% TEPA loaded inside pores without overflow. In comparison to TEPA modified adsorbent with a single pore structure, the TEPA modified HPS has a higher CO2 captured capacity (Table 3) [28], [49], [50], [51], [52], [53]. The higher CO2 adsorption capacity of TEPA modified HPS system is due to the large pore volume which can have a larger TEPA oaded capacity, and the different pore diameter which effectively reduce the mass transfer resistance and provide a more effective transportation for CO2 to the adsorption sites introduced in the adsorbent channel [34].”