Dynamic separation of ultradilute CO2 with a nanoporous amine-based sorbent

Development of monolithic adsorbent via polymeric sol–gel process for low-concentration CO2 capture

“…It can be seen form Fig. 8(b) that the total CO 2 adsorption capacities of AH-RFSA at different adsorption temperatures accord with that predicted by thermodynamic theories [56]. However, the useful CO 2 adsorption capacities are at the same level, as presented in Fig.…”

“…It is known that amine plays an important role in the CO 2 adsorption for amine functionalized solid adsorbents and higher amine contents generally leads to higher CO 2 adsorption capacity [44,56]. Obviously, high APTES ratio is preferred in order to achieve higher amine content in this reaction system.…”

Amine-modified ordered mesoporous silica: The effect of pore size on CO2 capture performance

“…A lot of researchers, [39,40] have reported that the moisture can enhance the CO 2 capture performance of solid amine sorbents by promoting the Page 15 of 28 A c c e p t e d M a n u s c r i p t formation of bicarbonate ions rather than carbamate ions. Hence, the improvement of CO 2 capture capacity in the presence of moisture could be explained by the generally accepted reaction mechanisms of CO 2 with amines [41,42] with which two moles of -NH 2 react with one mole CO 2 to form carbamate when H 2 O is absent from the reaction, whereas only one mole of NH 2 is needed for removal of 1 mol CO 2 to form bicarbonate in the presence of moisture.…”

New directions: Potential climate and productivity benefits from CO 2 capture in commercial buildings

“…Zhang et al (2014) have demonstrated a polyethyleneimine-silica adsorbent that removes CO 2 with nearly 100% capture at relatively short (7.5 s) media-air contact times. He et al (2012) have shown that removal of 80 mg CO 2 per gram of sorbent is possible at 400 ppm CO 2 and that the media can be regenerated at low temperatures with little effect on sorbent capacity. However, even assuming regeneration as frequent as weekly, substantial masses of sorbent media would be required to capture CO 2 from offices and schools.…”