The cyclic CO2 adsorption capacity of the HPS-TEPA-60% adsorbent

https://doi.org/10.1016/j.jiec.2017.05.018

“The large CO₂ capture capacity and better regenerability are necessary for adsorbents in the industrial applications. Ten CO₂ adsorption–desorption cycles were carried out in this study to assess the regenerability of prepared adsorbents by using the adsorbent with the 60 wt.% TEPA loadings as the assessment sample. The CO₂ was adsorbed from the simulated flue gas containing 15% CO₂ and 85% N₂ at 75 °C with the 60 ml/min feed flow rate. And the CO₂ was removed from adsorbent at 100 °C in a pure N₂ stream with 100 ml/min feed flow rate for 90 min. The CO₂ capture capacity of each adsorption–desorption cycles is listed in Fig. 10. After ten times CO₂ adsorption–desorption cycles, the CO₂ capture capacity reduces from 5.01 mmol/g to 4.7 mmol/g, only 6.1% reduction. The results indicated that the HPS-TEPA-60% had better stability and regenerability compared with TEPA impregnated MCM-41 in which CO₂ capture capacity reduced by 7.4% after ten adsorption–desorption cycles reported by Liu et al. [60]. When the MCM-41was modified by TEPA, some single ordered channel are easily blocked leading to a part of TEPA coat the support outer surface. However, for the HPS with different pore distributions, almost all of the TEPA molecules can be dispersed inside the different pore of support, the TEPA was more stably immobilized than that coated outside.”

“Fig. 10. The cyclic CO₂ adsorption capacity of the HPS-TEPA-60% adsorbent.”